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• Improve ffmpeg CPU usage by compromising quality

  29 septembre 2016, par Hardik Juneja

  I am using FFMpeg for screen capturing.
  I am looking for a screen capturing tool that will run on 1000 of VMs (windows and mac).The VMs have limited CPU (1 core) and 2GB ram and No GPU.

  Currently I invoke ffmpeg with

  ffmpeg  -y -framerate 8 -f dshow -f gdigrab -i "desktop"  -c:v libx264  -crf 0 -preset ultrafast -threads 0 temp.mkv

  I am using gdigrab to capture screen ? Is there any better options that might reduce cpu usage ? or changing the encoder or format ?

  I am aiming for 4-5% reduction in CPU usage.

  Thanks in advance

• How to get .mp4 videos from motion on a Raspberry Pi ?

  9 octobre 2016, par Maarti

  I use motion on my laptop and it works perfectly in any format. But when I use it on my Raspberry Pi 3 (Raspbian Jessie) with the Raspberry Camera V2, the only formats that work are : .avi and .swf.

  When I choose any other format, the output video is a "0 sec video" that is played and closed instantly.

  I would like to have .mp4 or .ogg output so I can read it easily with HTML5.

  Here is the motion codec documentation.

  Here is my config file :

  ############################################################
  
  # Daemon
  
  ############################################################
  
  
  
  # Start in daemon (background) mode and release terminal (default: off)
  
  daemon on
  
  
  
  # File to store the process ID, also called pid file. (default: not defined)
  
  process_id_file /var/run/motion/motion.pid
  
  
  
  ############################################################
  
  # Basic Setup Mode
  
  ############################################################
  
  
  
  # Start in Setup-Mode, daemon disabled. (default: off)
  
  setup_mode off
  
  
  
  
  
  # Use a file to save logs messages, if not defined stderr and syslog is used. (default: not defined)
  
  #logfile /mnt/camshare/Cam1/motion.log
  
  logfile /tmp/motion.log
  
  
  
  # Level of log messages [1..9] (EMR, ALR, CRT, ERR, WRN, NTC, INF, DBG, ALL). (default: 6 / NTC)
  
  log_level 2
  
  
  
  # Filter to log messages by type (COR, STR, ENC, NET, DBL, EVT, TRK, VID, ALL). (default: ALL)
  
  log_type all
  
  
  
  ###########################################################
  
  # Capture device options
  
  ############################################################
  
  
  
  # Videodevice to be used for capturing  (default /dev/video0)
  
  # for FreeBSD default is /dev/bktr0
  
  #videodevice /dev/video0
  
  
  
  # v4l2_palette allows to choose preferable palette to be use by motion
  
  # to capture from those supported by your videodevice. (default: 17)
  
  # E.g. if your videodevice supports both V4L2_PIX_FMT_SBGGR8 and
  
  # V4L2_PIX_FMT_MJPEG then motion will by default use V4L2_PIX_FMT_MJPEG.
  
  # Setting v4l2_palette to 2 forces motion to use V4L2_PIX_FMT_SBGGR8
  
  # instead.
  
  #
  
  # Values :
  
  # V4L2_PIX_FMT_SN9C10X : 0  'S910'
  
  # V4L2_PIX_FMT_SBGGR16 : 1  'BYR2'
  
  # V4L2_PIX_FMT_SBGGR8  : 2  'BA81'
  
  # V4L2_PIX_FMT_SPCA561 : 3  'S561'
  
  # V4L2_PIX_FMT_SGBRG8  : 4  'GBRG'
  
  # V4L2_PIX_FMT_SGRBG8  : 5  'GRBG'
  
  # V4L2_PIX_FMT_PAC207  : 6  'P207'
  
  # V4L2_PIX_FMT_PJPG    : 7  'PJPG'
  
  # V4L2_PIX_FMT_MJPEG   : 8  'MJPEG'
  
  # V4L2_PIX_FMT_JPEG    : 9  'JPEG'
  
  # V4L2_PIX_FMT_RGB24   : 10 'RGB3'
  
  # V4L2_PIX_FMT_SPCA501 : 11 'S501'
  
  # V4L2_PIX_FMT_SPCA505 : 12 'S505'
  
  # V4L2_PIX_FMT_SPCA508 : 13 'S508'
  
  # V4L2_PIX_FMT_UYVY    : 14 'UYVY'
  
  # V4L2_PIX_FMT_YUYV    : 15 'YUYV'
  
  # V4L2_PIX_FMT_YUV422P : 16 '422P'
  
  # V4L2_PIX_FMT_YUV420  : 17 'YU12'
  
  #
  
  v4l2_palette 7
  
  
  
  # Tuner device to be used for capturing using tuner as source (default /dev/tuner0)
  
  # This is ONLY used for FreeBSD. Leave it commented out for Linux
  
  ; tunerdevice /dev/tuner0
  
  
  
  # The video input to be used (default: -1)
  
  # Should normally be set to 0 or 1 for video/TV cards, and -1 for USB cameras
  
  input -1
  
  
  
  # The video norm to use (only for video capture and TV tuner cards)
  
  # Values: 0 (PAL), 1 (NTSC), 2 (SECAM), 3 (PAL NC no colour). Default: 0 (PAL)
  
  norm 0
  
  
  
  # The frequency to set the tuner to (kHz) (only for TV tuner cards) (default: 0)
  
  frequency 0
  
  
  
  # Rotate image this number of degrees. The rotation affects all saved images as
  
  # well as movies. Valid values: 0 (default = no rotation), 90, 180 and 270.
  
  rotate 0
  
  
  
  # Image width (pixels). Valid range: Camera dependent, default: 352
  
  #width 1024
  
  width 640
  
  
  
  # Image height (pixels). Valid range: Camera dependent, default: 288
  
  #height 576
  
  height 480
  
  
  
  # Maximum number of frames to be captured per second.
  
  # Valid range: 2-100. Default: 100 (almost no limit).
  
  framerate 15
  
  
  
  # Minimum time in seconds between capturing picture frames from the camera.
  
  # Default: 0 = disabled - the capture rate is given by the camera framerate.
  
  # This option is used when you want to capture images at a rate lower than 2 per second.
  
  minimum_frame_time 0
  
  
  
  # URL to use if you are using a network camera, size will be autodetected (incl http:// ftp:// mjpg:// or file:///)
  
  # Must be a URL that returns single jpeg pictures or a raw mjpeg stream. Default: Not defined
  
  ;netcam_url http://127.0.0.1/cgi-bin/raspicam.sh
  
  
  
  # Username and password for network camera (only if required). Default: not defined
  
  # Syntax is user:password
  
  ; netcam_userpass value
  
  
  
  # The setting for keep-alive of network socket, should improve performance on compatible net cameras.
  
  # off:   The historical implementation using HTTP/1.0, closing the socket after each http request.
  
  # force: Use HTTP/1.0 requests with keep alive header to reuse the same connection.
  
  # on:    Use HTTP/1.1 requests that support keep alive as default.
  
  # Default: off
  
  netcam_keepalive off
  
  
  
  # URL to use for a netcam proxy server, if required, e.g. "http://myproxy".
  
  # If a port number other than 80 is needed, use "http://myproxy:1234".
  
  # Default: not defined
  
  ; netcam_proxy value
  
  
  
  # Set less strict jpeg checks for network cameras with a poor/buggy firmware.
  
  # Default: off
  
  netcam_tolerant_check off
  
  
  
  # Let motion regulate the brightness of a video device (default: off).
  
  # The auto_brightness feature uses the brightness option as its target value.
  
  # If brightness is zero auto_brightness will adjust to average brightness value 128.
  
  # Only recommended for cameras without auto brightness
  
  auto_brightness off
  
  
  
  # Set the initial brightness of a video device.
  
  # If auto_brightness is enabled, this value defines the average brightness level
  
  # which Motion will try and adjust to.
  
  # Valid range 0-255, default 0 = disabled
  
  brightness 0
  
  
  
  # Set the contrast of a video device.
  
  # Valid range 0-255, default 0 = disabled
  
  contrast 0
  
  
  
  # Set the saturation of a video device.
  
  # Valid range 0-255, default 0 = disabled
  
  saturation 0
  
  
  
  # Set the hue of a video device (NTSC feature).
  
  # Valid range 0-255, default 0 = disabled
  
  hue 0
  
  
  
  ############################################################
  
  # File "camera" support - read raw YUV data from a file
  
  ############################################################
  
  #filecam_path /home/pi/test-cap/motion-mmal.capture
  
  
  
  ############################################################
  
  # OpenMax/MMAL camera support for Raspberry Pi
  
  ############################################################
  
  mmalcam_name vc.ril.camera
  
  #mmalcam_control_params
  
  #mmalcam_raw_capture_file /home/pi/motion-mmal.capture
  
  
  
  # Switch this setting to "on" to use the still image mode of the Pi's camera
  
  # instead of video. This gives a wider field of view, but requires
  
  # a much slower frame-rate to achieve exposure stability
  
  # (e.g. 0.25 fps or slower). You can use the minimum_frame_time
  
  # parameter above to achieve this
  
  
  
  mmalcam_use_still off
  
  
  
  
  
  ############################################################
  
  # Round Robin (multiple inputs on same video device name)
  
  ############################################################
  
  
  
  # Number of frames to capture in each roundrobin step (default: 1)
  
  roundrobin_frames 1
  
  
  
  # Number of frames to skip before each roundrobin step (default: 1)
  
  roundrobin_skip 1
  
  
  
  # Try to filter out noise generated by roundrobin (default: off)
  
  switchfilter off
  
  
  
  
  
  ############################################################
  
  # Motion Detection Settings:
  
  ############################################################
  
  
  
  # Threshold for number of changed pixels in an image that
  
  # triggers motion detection (default: 1500)
  
  threshold 1500
  
  
  
  # Automatically tune the threshold down if possible (default: off)
  
  threshold_tune off
  
  
  
  # Noise threshold for the motion detection (default: 32)
  
  noise_level 32
  
  
  
  # Automatically tune the noise threshold (default: on)
  
  noise_tune on
  
  
  
  # Despeckle motion image using (e)rode or (d)ilate or (l)abel (Default: not defined)
  
  # Recommended value is EedDl. Any combination (and number of) of E, e, d, and D is valid.
  
  # (l)abeling must only be used once and the 'l' must be the last letter.
  
  # Comment out to disable
  
  despeckle_filter EedDl
  
  
  
  # Detect motion in predefined areas (1 - 9). Areas are numbered like that:  1 2 3
  
  # A script (on_area_detected) is started immediately when motion is         4 5 6
  
  # detected in one of the given areas, but only once during an event.        7 8 9
  
  # One or more areas can be specified with this option. Take care: This option
  
  # does NOT restrict detection to these areas! (Default: not defined)
  
  ; area_detect value
  
  
  
  # PGM file to use as a sensitivity mask.
  
  # Full path name to. (Default: not defined)
  
  ; mask_file value
  
  
  
  # Dynamically create a mask file during operation (default: 0)
  
  # Adjust speed of mask changes from 0 (off) to 10 (fast)
  
  smart_mask_speed 0
  
  
  
  # Ignore sudden massive light intensity changes given as a percentage of the picture
  
  # area that changed intensity. Valid range: 0 - 100 , default: 0 = disabled
  
  lightswitch 0
  
  
  
  # Picture frames must contain motion at least the specified number of frames
  
  # in a row before they are detected as true motion. At the default of 1, all
  
  # motion is detected. Valid range: 1 to thousands, recommended 1-5
  
  minimum_motion_frames 1
  
  
  
  # Specifies the number of pre-captured (buffered) pictures from before motion
  
  # was detected that will be output at motion detection.
  
  # Recommended range: 0 to 5 (default: 0)
  
  # Do not use large values! Large values will cause Motion to skip video frames and
  
  # cause unsmooth movies. To smooth movies use larger values of post_capture instead.
  
  pre_capture 2
  
  
  
  # Number of frames to capture after motion is no longer detected (default: 0)
  
  post_capture 2
  
  
  
  # Event Gap is the seconds of no motion detection that triggers the end of an event.
  
  # An event is defined as a series of motion images taken within a short timeframe.
  
  # Recommended value is 60 seconds (Default). The value -1 is allowed and disables
  
  # events causing all Motion to be written to one single movie file and no pre_capture.
  
  # If set to 0, motion is running in gapless mode. Movies don't have gaps anymore. An
  
  # event ends right after no more motion is detected and post_capture is over.
  
  event_gap 60
  
  
  
  # Maximum length in seconds of an mpeg movie
  
  # When value is exceeded a new movie file is created. (Default: 0 = infinite)
  
  # ATTENTION: when you're not using the motion build from the tutorial, it might fail with error 'Unknown config option "max_mpeg_time"'
  
  # the use this line instead:
  
  # max_movie_time 60
  
  max_movie_time 60
  
  
  
  # Always save images even if there was no motion (default: off)
  
  emulate_motion off
  
  
  
  
  
  ############################################################
  
  # Image File Output
  
  ############################################################
  
  
  
  # Output 'normal' pictures when motion is detected (default: on)
  
  # Valid values: on, off, first, best, center
  
  # When set to 'first', only the first picture of an event is saved.
  
  # Picture with most motion of an event is saved when set to 'best'.
  
  # Picture with motion nearest center of picture is saved when set to 'center'.
  
  # Can be used as preview shot for the corresponding movie.
  
  output_pictures best
  
  
  
  # Output pictures with only the pixels moving object (ghost images) (default: off)
  
  output_debug_pictures off
  
  
  
  # The quality (in percent) to be used by the jpeg compression (default: 75)
  
  quality 75
  
  
  
  # Type of output images
  
  # Valid values: jpeg, ppm (default: jpeg)
  
  picture_type jpeg
  
  
  
  ############################################################
  
  # FFMPEG related options
  
  # Film (movies) file output, and deinterlacing of the video input
  
  # The options movie_filename and timelapse_filename are also used
  
  # by the ffmpeg feature
  
  ############################################################
  
  
  
  # Use ffmpeg to encode movies in realtime (default: off)
  
  ffmpeg_output_movies on
  
  
  
  # Use ffmpeg to make movies with only the pixels moving
  
  # object (ghost images) (default: off)
  
  ffmpeg_output_debug_movies off
  
  
  
  # Use ffmpeg to encode a timelapse movie
  
  # Default value 0 = off - else save frame every Nth second
  
  ffmpeg_timelapse 0
  
  
  
  # The file rollover mode of the timelapse video
  
  # Valid values: hourly, daily (default), weekly-sunday, weekly-monday, monthly, manual
  
  ffmpeg_timelapse_mode daily
  
  
  
  # Bitrate to be used by the ffmpeg encoder (default: 400000)
  
  # This option is ignored if ffmpeg_variable_bitrate is not 0 (disabled)
  
  ffmpeg_bps 500000
  
  
  
  # Enables and defines variable bitrate for the ffmpeg encoder.
  
  # ffmpeg_bps is ignored if variable bitrate is enabled.
  
  # Valid values: 0 (default) = fixed bitrate defined by ffmpeg_bps,
  
  # or the range 2 - 31 where 2 means best quality and 31 is worst.
  
  ffmpeg_variable_bitrate 5
  
  
  
  # Codec to used by ffmpeg for the video compression.
  
  # Timelapse mpegs are always made in mpeg1 format independent from this option.
  
  # Supported formats are: mpeg1 (ffmpeg-0.4.8 only), mpeg4 (default), and msmpeg4.
  
  # mpeg1 - gives you files with extension .mpg
  
  # mpeg4 or msmpeg4 - gives you files with extension .avi
  
  # msmpeg4 is recommended for use with Windows Media Player because
  
  # it requires no installation of codec on the Windows client.
  
  # swf - gives you a flash film with extension .swf
  
  # flv - gives you a flash video with extension .flv
  
  # ffv1 - FF video codec 1 for Lossless Encoding ( experimental )
  
  # mov - QuickTime ( testing )
  
  # ogg - Ogg/Theora ( testing )
  
  #ffmpeg_video_codec msmpeg4
  
  ffmpeg_video_codec mp4
  
  
  
  # Use ffmpeg to deinterlace video. Necessary if you use an analog camera
  
  # and see horizontal combing on moving objects in video or pictures.
  
  # (default: off)
  
  ffmpeg_deinterlace off
  
  
  
  ############################################################
  
  # SDL Window
  
  ############################################################
  
  
  
  # Number of motion thread to show in SDL Window (default: 0 = disabled)
  
  #sdl_threadnr 0
  
  
  
  ############################################################
  
  # External pipe to video encoder
  
  # Replacement for FFMPEG builtin encoder for ffmpeg_output_movies only.
  
  # The options movie_filename and timelapse_filename are also used
  
  # by the ffmpeg feature
  
  #############################################################
  
  
  
  # Bool to enable or disable extpipe (default: off)
  
  use_extpipe off
  
  
  
  # External program (full path and opts) to pipe raw video to
  
  # Generally, use '-' for STDIN...
  
  ;extpipe mencoder -demuxer rawvideo -rawvideo w=320:h=240:i420 -ovc x264 -x264encopts bframes=4:frameref=1:subq=1:scenecut=-1:nob_adapt:threads=1:keyint=1000:8x8dct:vbv_bufsize=4000:crf=24:partitions=i8x8,i4x4:vbv_maxrate=800:no-chroma-me -vf denoise3d=16:12:48:4,pp=lb -of   avi -o %f.avi - -fps %fps
  
  
  
  
  
  
  
  ############################################################
  
  # Snapshots (Traditional Periodic Webcam File Output)
  
  ############################################################
  
  
  
  # Make automated snapshot every N seconds (default: 0 = disabled)
  
  snapshot_interval 0
  
  
  
  
  
  ############################################################
  
  # Text Display
  
  # %Y = year, %m = month, %d = date,
  
  # %H = hour, %M = minute, %S = second, %T = HH:MM:SS,
  
  # %v = event, %q = frame number, %t = thread (camera) number,
  
  # %D = changed pixels, %N = noise level, \n = new line,
  
  # %i and %J = width and height of motion area,
  
  # %K and %L = X and Y coordinates of motion center
  
  # %C = value defined by text_event - do not use with text_event!
  
  # You can put quotation marks around the text to allow
  
  # leading spaces
  
  ############################################################
  
  
  
  # Locate and draw a box around the moving object.
  
  # Valid values: on, off, preview (default: off)
  
  # Set to 'preview' will only draw a box in preview_shot pictures.
  
  locate_motion_mode off
  
  
  
  # Set the look and style of the locate box if enabled.
  
  # Valid values: box, redbox, cross, redcross (default: box)
  
  # Set to 'box' will draw the traditional box.
  
  # Set to 'redbox' will draw a red box.
  
  # Set to 'cross' will draw a little cross to mark center.
  
  # Set to 'redcross' will draw a little red cross to mark center.
  
  locate_motion_style box
  
  
  
  # Draws the timestamp using same options as C function strftime(3)
  
  # Default: %Y-%m-%d\n%T = date in ISO format and time in 24 hour clock
  
  # Text is placed in lower right corner
  
  text_right %d.%m.%Y\n%T
  
  
  
  # Draw a user defined text on the images using same options as C function strftime(3)
  
  # Default: Not defined = no text
  
  # Text is placed in lower left corner
  
  ; text_left CAMERA %t
  
  text_left HofCam
  
  
  
  # Draw the number of changed pixed on the images (default: off)
  
  # Will normally be set to off except when you setup and adjust the motion settings
  
  # Text is placed in upper right corner
  
  text_changes off
  
  
  
  # This option defines the value of the special event conversion specifier %C
  
  # You can use any conversion specifier in this option except %C. Date and time
  
  # values are from the timestamp of the first image in the current event.
  
  # Default: %Y%m%d%H%M%S
  
  # The idea is that %C can be used filenames and text_left/right for creating
  
  # a unique identifier for each event.
  
  text_event %Y%m%d%H%M%S
  
  
  
  # Draw characters at twice normal size on images. (default: off)
  
  text_double on
  
  
  
  
  
  # Text to include in a JPEG EXIF comment
  
  # May be any text, including conversion specifiers.
  
  # The EXIF timestamp is included independent of this text.
  
  ;exif_text %i%J/%K%L
  
  
  
  ############################################################
  
  # Target Directories and filenames For Images And Films
  
  # For the options snapshot_, picture_, movie_ and timelapse_filename
  
  # you can use conversion specifiers
  
  # %Y = year, %m = month, %d = date,
  
  # %H = hour, %M = minute, %S = second,
  
  # %v = event, %q = frame number, %t = thread (camera) number,
  
  # %D = changed pixels, %N = noise level,
  
  # %i and %J = width and height of motion area,
  
  # %K and %L = X and Y coordinates of motion center
  
  # %C = value defined by text_event
  
  # Quotation marks round string are allowed.
  
  ############################################################
  
  
  
  # Target base directory for pictures and films
  
  # Recommended to use absolute path. (Default: current working directory)
  
  target_dir /home/pi
  
  
  
  # File path for snapshots (jpeg or ppm) relative to target_dir
  
  # Default: %v-%Y%m%d%H%M%S-snapshot
  
  # Default value is equivalent to legacy oldlayout option
  
  # For Motion 3.0 compatible mode choose: %Y/%m/%d/%H/%M/%S-snapshot
  
  # File extension .jpg or .ppm is automatically added so do not include this.
  
  # Note: A symbolic link called lastsnap.jpg created in the target_dir will always
  
  # point to the latest snapshot, unless snapshot_filename is exactly 'lastsnap'
  
  snapshot_filename %v-%Y%m%d%H%M%S-snapshot
  
  
  
  # File path for motion triggered images (jpeg or ppm) relative to target_dir
  
  # Default: %v-%Y%m%d%H%M%S-%q
  
  # Default value is equivalent to legacy oldlayout option
  
  # For Motion 3.0 compatible mode choose: %Y/%m/%d/%H/%M/%S-%q
  
  # File extension .jpg or .ppm is automatically added so do not include this
  
  # Set to 'preview' together with best-preview feature enables special naming
  
  # convention for preview shots. See motion guide for details
  
  picture_filename %v-%Y%m%d%H%M%S-%q
  
  
  
  # File path for motion triggered ffmpeg films (movies) relative to target_dir
  
  # Default: %v-%Y%m%d%H%M%S
  
  # Default value is equivalent to legacy oldlayout option
  
  # For Motion 3.0 compatible mode choose: %Y/%m/%d/%H%M%S
  
  # File extension .mpg or .avi is automatically added so do not include this
  
  # This option was previously called ffmpeg_filename
  
  movie_filename %v-%Y%m%d%H%M%S
  
  
  
  # File path for timelapse movies relative to target_dir
  
  # Default: %Y%m%d-timelapse
  
  # Default value is near equivalent to legacy oldlayout option
  
  # For Motion 3.0 compatible mode choose: %Y/%m/%d-timelapse
  
  # File extension .mpg is automatically added so do not include this
  
  timelapse_filename %Y%m%d-timelapse
  
  
  
  ############################################################
  
  # Global Network Options
  
  ############################################################
  
  # Enable or disable IPV6 for http control and stream (default: off )
  
  ipv6_enabled off
  
  
  
  ############################################################
  
  # Live Stream Server
  
  ############################################################
  
  
  
  # The mini-http server listens to this port for requests (default: 0 = disabled)
  
  stream_port 8080
  
  
  
  # Quality of the jpeg (in percent) images produced (default: 50)
  
  stream_quality 50
  
  
  
  # Output frames at 1 fps when no motion is detected and increase to the
  
  # rate given by stream_maxrate when motion is detected (default: off)
  
  stream_motion on
  
  
  
  # Maximum framerate for stream streams (default: 1)
  
  stream_maxrate 4
  
  
  
  # Restrict stream connections to localhost only (default: on)
  
  stream_localhost off
  
  
  
  # Limits the number of images per connection (default: 0 = unlimited)
  
  # Number can be defined by multiplying actual stream rate by desired number of seconds
  
  # Actual stream rate is the smallest of the numbers framerate and stream_maxrate
  
  stream_limit 0
  
  
  
  # Set the authentication method (default: 0)
  
  # 0 = disabled
  
  # 1 = Basic authentication
  
  # 2 = MD5 digest (the safer authentication)
  
  stream_auth_method 0
  
  
  
  # Authentication for the stream. Syntax username:password
  
  # Default: not defined (Disabled)
  
  ; stream_authentication username:password
  
  
  
  
  
  ############################################################
  
  # HTTP Based Control
  
  ############################################################
  
  
  
  # TCP/IP port for the http server to listen on (default: 0 = disabled)
  
  webcontrol_port 8081
  
  
  
  # Restrict control connections to localhost only (default: on)
  
  webcontrol_localhost off
  
  
  
  # Output for http server, select off to choose raw text plain (default: on)
  
  webcontrol_html_output on
  
  
  
  # Authentication for the http based control. Syntax username:password
  
  # Default: not defined (Disabled)
  
  ; webcontrol_authentication username:password
  
  
  
  
  
  ############################################################
  
  # Tracking (Pan/Tilt)
  
  #############################################################
  
  
  
  # Type of tracker (0=none (default), 1=stepper, 2=iomojo, 3=pwc, 4=generic, 5=uvcvideo, 6=servo)
  
  # The generic type enables the definition of motion center and motion size to
  
  # be used with the conversion specifiers for options like on_motion_detected
  
  track_type 0
  
  
  
  # Enable auto tracking (default: off)
  
  track_auto off
  
  
  
  # Serial port of motor (default: none)
  
  ;track_port /dev/ttyS0
  
  
  
  # Motor number for x-axis (default: 0)
  
  ;track_motorx 0
  
  
  
  # Set motorx reverse (default: 0)
  
  ;track_motorx_reverse 0
  
  
  
  # Motor number for y-axis (default: 0)
  
  ;track_motory 1
  
  
  
  # Set motory reverse (default: 0)
  
  ;track_motory_reverse 0
  
  
  
  # Maximum value on x-axis (default: 0)
  
  ;track_maxx 200
  
  
  
  # Minimum value on x-axis (default: 0)
  
  ;track_minx 50
  
  
  
  # Maximum value on y-axis (default: 0)
  
  ;track_maxy 200
  
  
  
  # Minimum value on y-axis (default: 0)
  
  ;track_miny 50
  
  
  
  # Center value on x-axis (default: 0)
  
  ;track_homex 128
  
  
  
  # Center value on y-axis (default: 0)
  
  ;track_homey 128
  
  
  
  # ID of an iomojo camera if used (default: 0)
  
  track_iomojo_id 0
  
  
  
  # Angle in degrees the camera moves per step on the X-axis
  
  # with auto-track (default: 10)
  
  # Currently only used with pwc type cameras
  
  track_step_angle_x 10
  
  
  
  [...]

• How to Crop the visible portion of landscape video in android ?

  30 août 2016, par Deepak
  1. I am working on Panning and cropping the landscape video using Texture View.I am in a half way that I can pan the landscape video from left to right vice versa by using this example
     https://github.com/crust87/Android-VideoCropView.

  

  

  2. FFMPEG can crop the particular portion of the video by using this command
     ffmpeg -i /sdcard/videokit/in.mp4 -filter:v crop=720:1088:0:0 -c:a
copy /sdcard/videokit/out.mp4

  How can I crop only the video which is visible in Texture View and save it local storage in Android.

  crop=720:1088:0:0 is a hard coded width and height of the video and it is cropping fine.But how can I get the width and height of the visible video in Texture View to crop the visible video and Save it to the local storage in android.

  public class MainActivity extends Activity {
  
  
  
      // Layout Components
  
      private FrameLayout top_frame;
  
  
  
      // Attributes
  
      private String originalPath;
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.check);
  
          top_frame = (FrameLayout)findViewById(R.id.top_frame);
  
      }
  
  
  
      @Override
  
      protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  
          if (requestCode == 1000 && resultCode == RESULT_OK) {
  
              final VideoCropView mVideoCropView = new VideoCropView(this);
  
              mVideoCropView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
  
  
  
                  @Override
  
                  public void onPrepared(MediaPlayer mp) {
  
                      mVideoCropView.start();
  
                  }
  
              });
  
              top_frame.addView(mVideoCropView);
  
              Uri selectedVideoUri = data.getData();
  
  
  
              originalPath = getRealPathFromURI(selectedVideoUri);
  
  
  
              mVideoCropView.setVideoURI(selectedVideoUri);
  
  
  
              mVideoCropView.seekTo(1);
  
          }
  
      }
  
  
  
      public void onButtonLoadClick(View v) {
  
          top_frame.removeAllViews();
  
          Intent lIntent = new Intent(Intent.ACTION_PICK);
  
          lIntent.setType("video/*");
  
          lIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
  
          startActivityForResult(lIntent, 1000);
  
      }
  
  
  
      public String getRealPathFromURI(Uri contentUri) {    // getting image path from gallery.
  
          Cursor cursor = null;
  
          try {
  
              String[] proj = { MediaStore.Images.Media.DATA };
  
              cursor = getApplicationContext().getContentResolver().query(contentUri, proj, null, null, null);
  
              int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
  
              cursor.moveToFirst();
  
              return cursor.getString(column_index);
  
          } finally {
  
              if (cursor != null) {
  
                  cursor.close();
  
              }
  
          }
  
      }
  
  
  
  }

  CropVideoView

  public class VideoCropView extends TextureView implements MediaPlayerControl {
  
      // Constants
  
      private static final String LOG_TAG = "VideoCropView";
  
      private static final int STATE_ERROR = -1;
  
      private static final int STATE_IDLE = 0;
  
      private static final int STATE_PREPARING = 1;
  
      private static final int STATE_PREPARED = 2;
  
      private static final int STATE_PLAYING = 3;
  
      private static final int STATE_PAUSED = 4;
  
      private static final int STATE_PLAYBACK_COMPLETED = 5;
  
  
  
      // MediaPlayer Components
  
      protected Context mContext;
  
      private MediaPlayer mMediaPlayer;
  
      private Surface mSurface;
  
      private OnInfoListener mOnInfoListener;
  
      private OnCompletionListener mOCompletionListener;
  
      private OnErrorListener mOnErrorListener;
  
      private OnPreparedListener mOnPreparedListener;
  
      private OnTranslatePositionListener mOnTranslatePositionListener;
  
  
  
      // CropView Components
  
      private Matrix mMatrix;
  
  
  
      // MediaPlayer Attributes
  
      protected Uri mUri;
  
      private int mCurrentBufferPercentage;
  
      private int mSeekWhenPrepared;
  
      protected int mVideoWidth;
  
      protected int mVideoHeight;
  
  
  
      // CropView Attributes
  
      private float mRatioWidth;
  
      private float mRatioHeight;
  
      private float mPositionX;
  
      private float mPositionY;
  
      private float mBoundX;
  
      private float mBoundY;
  
      private int mRotate;
  
      private float mScaleX;
  
      private float mScaleY;
  
      private float mScale;
  
  
  
      // Working Variables
  
      private int mCurrentState = STATE_IDLE;
  
      private int mTargetState = STATE_IDLE;
  
  
  
      // Touch Event
  
      // past position x, y and move point
  
      float mPastX;
  
      float mPastY;
  
      float mTouchDistance;
  
      private Context context;
  
  
  
      // Constructors
  
      public VideoCropView(final Context context) {
  
          super(context);
  
          mContext = context;
  
  
  
          initAttributes();
  
          initVideoView();
  
      }
  
  
  
      public VideoCropView(final Context context, final AttributeSet attrs) {
  
          super(context, attrs);
  
          mContext = context;
  
  
  
          initAttributes(context, attrs, 0);
  
          initVideoView();
  
      }
  
  
  
      public VideoCropView(Context context, AttributeSet attrs, int defStyleAttr) {
  
          super(context, attrs, defStyleAttr);
  
          mContext = context;
  
  
  
          initAttributes(context, attrs, defStyleAttr);
  
          initVideoView();
  
      }
  
  
  
      private void initAttributes() {
  
          mRatioWidth = 1;
  
          mRatioHeight = 1;
  
      }
  
  
  
      private void initAttributes(Context context, AttributeSet attrs, int defStyleAttr) {
  
          TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.VideoCropView, defStyleAttr, 0);
  
  
  
          mRatioWidth = typedArray.getInteger(R.styleable.VideoCropView_ratio_width, 3);
  
          mRatioHeight = typedArray.getInteger(R.styleable.VideoCropView_ratio_height, 4);
  
      }
  
  
  
      @Override
  
      protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
  
          int heightLayout;
  
          int widthLayout;
  
          widthLayout = MeasureSpec.getSize(widthMeasureSpec);
  
          heightLayout = MeasureSpec.getSize(heightMeasureSpec);
  
          setMeasuredDimension(widthLayout, heightLayout);
  
  
  
          /*if(widthMeasureSpec < heightMeasureSpec){
  
  
  
              int width = MeasureSpec.getSize(widthMeasureSpec);
  
              int height = (int) ((width / mRatioWidth) * mRatioHeight);
  
  
  
  
  
              setMeasuredDimension(width, height);
  
  
  
          }else{
  
  
  
              int width = MeasureSpec.getSize(widthMeasureSpec);
  
              int height =MeasureSpec.getSize(heightMeasureSpec);
  
              setMeasuredDimension(width, height);
  
  
  
          }
  
  */
  
      }
  
  
  
      @Override
  
      public boolean onTouchEvent(MotionEvent event) {
  
          if(mCurrentState == STATE_ERROR || mCurrentState == STATE_IDLE || mCurrentState == STATE_PREPARING) {
  
              return false;
  
          }
  
  
  
          switch (event.getAction()) {
  
              case MotionEvent.ACTION_DOWN:
  
                  mPastX = event.getX();
  
                  mPastY = event.getY();
  
                  mTouchDistance = 0;
  
              case MotionEvent.ACTION_MOVE:
  
                  if(mBoundX!=0 || mBoundY!=0) {
  
                      float dx = event.getX() - mPastX;
  
                      float dy = event.getY() - mPastY;
  
                      updateViewPosition(dx, dy);
  
                      mPastX = event.getX();
  
                      mPastY = event.getY();
  
                      mTouchDistance += (Math.abs(dx) + Math.abs(dy));
  
                  }
  
                  break;
  
              case MotionEvent.ACTION_UP:
  
                  if (mTouchDistance < 25) {
  
                      if (isPlaying()) {
  
                          pause();
  
                      } else {
  
                          start();
  
                      }
  
                  }
  
  
  
                  mTouchDistance = 0;
  
                  break;
  
          }
  
  
  
          return true;
  
      }
  
  
  
      @Override
  
      public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
  
          super.onInitializeAccessibilityEvent(event);
  
          event.setClassName(VideoView.class.getName());
  
      }
  
  
  
      @Override
  
      public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
  
          super.onInitializeAccessibilityNodeInfo(info);
  
          info.setClassName(VideoView.class.getName());
  
      }
  
  
  
      public int resolveAdjustedSize(int desiredSize, int measureSpec) {
  
          Log.d(LOG_TAG, "Resolve called.");
  
          int result = desiredSize;
  
          int specMode = MeasureSpec.getMode(measureSpec);
  
          int specSize = MeasureSpec.getSize(measureSpec);
  
  
  
          switch (specMode) {
  
              case MeasureSpec.UNSPECIFIED:
  
              /*
  
               * Parent says we can be as big as we want. Just don't be larger
  
               * than max size imposed on ourselves.
  
               */
  
                  result = desiredSize;
  
                  break;
  
  
  
              case MeasureSpec.AT_MOST:
  
              /*
  
               * Parent says we can be as big as we want, up to specSize. Don't be
  
               * larger than specSize, and don't be larger than the max size
  
               * imposed on ourselves.
  
               */
  
                  result = Math.min(desiredSize, specSize);
  
                  break;
  
  
  
              case MeasureSpec.EXACTLY:
  
                  // No choice. Do what we are told.
  
                  result = specSize;
  
                  break;
  
          }
  
          return result;
  
      }
  
  
  
      public void initVideoView() {
  
  
  
          mVideoHeight = 0;
  
          mVideoWidth = 0;
  
          setFocusable(false);
  
          setSurfaceTextureListener(mSurfaceTextureListener);
  
          mCurrentState = STATE_IDLE;
  
          mTargetState = STATE_IDLE;
  
  
  
      }
  
  
  
      public void setVideoPath(String path) {
  
          if (path != null) {
  
              setVideoURI(Uri.parse(path));
  
          }
  
      }
  
  
  
      public void setVideoURI(Uri pVideoURI) {
  
          mUri = pVideoURI;
  
          mSeekWhenPrepared = 0;
  
  
  
          MediaMetadataRetriever retriever = new MediaMetadataRetriever();
  
          retriever.setDataSource(mContext, pVideoURI);
  
  
  
          // create thumbnail bitmap
  
          if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
  
              String rotation = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
  
  
  
              try {
  
                  mRotate = Integer.parseInt(rotation);
  
              } catch(NumberFormatException e) {
  
                  mRotate = 0;
  
              }
  
          }
  
  
  
          retriever.release();
  
  
  
          openVideo();
  
          requestLayout();
  
          invalidate();
  
      }
  
  
  
      public void stopPlayback() {
  
          if (mMediaPlayer != null) {
  
              mMediaPlayer.stop();
  
              mMediaPlayer.release();
  
              mMediaPlayer = null;
  
              mCurrentState = STATE_IDLE;
  
              mTargetState = STATE_IDLE;
  
          }
  
      }
  
  
  
      public void openVideo() {
  
          if ((mUri == null) || (mSurface == null)) {
  
              // not ready for playback just yet, will try again later
  
              return;
  
          }
  
          // Tell the music playback service to pause
  
          // TODO: these constants need to be published somewhere in the
  
          // framework.
  
          Intent intent = new Intent("com.android.music.musicservicecommand");
  
          intent.putExtra("command", "pause");
  
          mContext.sendBroadcast(intent);
  
  
  
          // we shouldn't clear the target state, because somebody might have
  
          // called start() previously
  
          release(false);
  
          try {
  
              mMediaPlayer = new MediaPlayer();
  
              // TODO: create SubtitleController in MediaPlayer, but we need
  
              // a context for the subtitle renderers
  
  
  
              mMediaPlayer.setOnPreparedListener(mPreparedListener);
  
              mMediaPlayer.setOnVideoSizeChangedListener(mSizeChangedListener);
  
              mMediaPlayer.setOnCompletionListener(mCompletionListener);
  
              mMediaPlayer.setOnErrorListener(mErrorListener);
  
              mMediaPlayer.setOnInfoListener(mInfoListener);
  
              mMediaPlayer.setOnBufferingUpdateListener(mBufferingUpdateListener);
  
              mCurrentBufferPercentage = 0;
  
              mMediaPlayer.setDataSource(mContext, mUri);
  
              mMediaPlayer.setSurface(mSurface);
  
              mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
  
  
  
              mMediaPlayer.setScreenOnWhilePlaying(true);
  
              mMediaPlayer.prepareAsync();
  
              mMediaPlayer.setLooping(true);
  
              mCurrentState = STATE_PREPARING;
  
          } catch (IllegalStateException e) {
  
              mCurrentState = STATE_ERROR;
  
              mTargetState = STATE_ERROR;
  
              e.printStackTrace();
  
          } catch (IOException e) {
  
              mCurrentState = STATE_ERROR;
  
              mTargetState = STATE_ERROR;
  
              e.printStackTrace();
  
          }
  
      }
  
  
  
      private OnVideoSizeChangedListener mSizeChangedListener = new OnVideoSizeChangedListener() {
  
          @Override
  
          public void onVideoSizeChanged(final MediaPlayer mp, final int width,
  
                                         final int height) {
  
              mVideoWidth = mp.getVideoWidth();
  
              mVideoHeight = mp.getVideoHeight();
  
  
  
              if (mVideoWidth != 0 && mVideoHeight != 0) {
  
                  requestLayout();
  
                  if(mVideoWidth >= mVideoHeight)
  
                  initVideo();
  
              }
  
          }
  
      };
  
  
  
      private OnPreparedListener mPreparedListener = new OnPreparedListener() {
  
          @Override
  
          public void onPrepared(final MediaPlayer mp) {
  
              mCurrentState = STATE_PREPARED;
  
  
  
              if (mOnPreparedListener != null) {
  
                  mOnPreparedListener.onPrepared(mp);
  
              }
  
  
  
              mVideoWidth = mp.getVideoWidth();
  
              mVideoHeight = mp.getVideoHeight();
  
  
  
              int seekToPosition = mSeekWhenPrepared; // mSeekWhenPrepared may be
  
              // changed after seekTo()
  
              if (seekToPosition != 0) {
  
                  seekTo(seekToPosition);
  
              }
  
  
  
              if ((mVideoWidth != 0) && (mVideoHeight != 0)) {
  
                  if(mVideoWidth >= mVideoHeight) initVideo();
  
  
  
                  if (mTargetState == STATE_PLAYING) {
  
                      start();
  
                  }
  
              } else {
  
                  // We don't know the video size yet, but should start anyway.
  
                  // The video size might be reported to us later.
  
                  if (mTargetState == STATE_PLAYING) {
  
                      start();
  
                  }
  
              }
  
          }
  
      };
  
  
  
      private OnCompletionListener mCompletionListener = new OnCompletionListener() {
  
          @Override
  
          public void onCompletion(final MediaPlayer mp) {
  
              mCurrentState = STATE_PLAYBACK_COMPLETED;
  
              mTargetState = STATE_PLAYBACK_COMPLETED;
  
  
  
              if (mOCompletionListener != null) {
  
                  mOCompletionListener.onCompletion(mMediaPlayer);
  
              }
  
          }
  
      };
  
  
  
      private OnInfoListener mInfoListener = new OnInfoListener() {
  
          public boolean onInfo(MediaPlayer mp, int arg1, int arg2) {
  
              if (mOnInfoListener != null) {
  
                  mOnInfoListener.onInfo(mp, arg1, arg2);
  
              }
  
              return true;
  
          }
  
      };
  
  
  
      private OnErrorListener mErrorListener = new OnErrorListener() {
  
          @Override
  
          public boolean onError(MediaPlayer mp, int framework_err, int impl_err) {
  
              Log.d(LOG_TAG, "Error: " + framework_err + "," + impl_err);
  
              mCurrentState = STATE_ERROR;
  
              mTargetState = STATE_ERROR;
  
  
  
              /* If an error handler has been supplied, use it and finish. */
  
              if (mOnErrorListener != null) {
  
                  if (mOnErrorListener.onError(mMediaPlayer, framework_err,
  
                          impl_err)) {
  
                      return true;
  
                  }
  
              }
  
              return true;
  
          }
  
      };
  
  
  
      private OnBufferingUpdateListener mBufferingUpdateListener = new OnBufferingUpdateListener() {
  
          @Override
  
          public void onBufferingUpdate(final MediaPlayer mp, final int percent) {
  
              mCurrentBufferPercentage = percent;
  
          }
  
      };
  
  
  
      public void setOnPreparedListener(OnPreparedListener listener) {
  
          mOnPreparedListener = listener;
  
      }
  
  
  
      public void setOnCompletionListener(OnCompletionListener listener) {
  
          mOCompletionListener = listener;
  
      }
  
  
  
      public void setOnErrorListener(OnErrorListener listener) {
  
          mOnErrorListener = listener;
  
      }
  
  
  
      public void setOnInfoListener(OnInfoListener listener) {
  
          mOnInfoListener = listener;
  
      }
  
  
  
      private void release(boolean cleartargetstate) {
  
          if (mMediaPlayer != null) {
  
              mMediaPlayer.reset();
  
              mMediaPlayer.release();
  
              mMediaPlayer = null;
  
              mCurrentState = STATE_IDLE;
  
              if (cleartargetstate) {
  
                  mTargetState = STATE_IDLE;
  
              }
  
          }
  
      }
  
  
  
      @Override
  
      public void start() {
  
          if (isInPlaybackState()) {
  
              mMediaPlayer.start();
  
              mCurrentState = STATE_PLAYING;
  
  
  
          }
  
          mTargetState = STATE_PLAYING;
  
      }
  
  
  
      @Override
  
      public void pause() {
  
          if (isInPlaybackState()) {
  
              if (mMediaPlayer.isPlaying()) {
  
                  mMediaPlayer.pause();
  
                  mCurrentState = STATE_PAUSED;
  
              }
  
          }
  
  
  
          mTargetState = STATE_PAUSED;
  
      }
  
  
  
      @Override
  
      public int getDuration() {
  
          if (isInPlaybackState()) {
  
              return mMediaPlayer.getDuration();
  
          }
  
  
  
          return -1;
  
      }
  
  
  
      @Override
  
      public int getCurrentPosition() {
  
          if (isInPlaybackState()) {
  
              return mMediaPlayer.getCurrentPosition();
  
          }
  
          return 0;
  
      }
  
  
  
      @Override
  
      public void seekTo(int msec) {
  
          if (isInPlaybackState()) {
  
              mMediaPlayer.seekTo(msec);
  
              mSeekWhenPrepared = 0;
  
          } else {
  
              mSeekWhenPrepared = msec;
  
          }
  
      }
  
  
  
      @Override
  
      public boolean isPlaying() {
  
          return isInPlaybackState() && mMediaPlayer.isPlaying();
  
      }
  
  
  
      @Override
  
      public int getBufferPercentage() {
  
          if (mMediaPlayer != null) {
  
              return mCurrentBufferPercentage;
  
          }
  
          return 0;
  
      }
  
  
  
      private boolean isInPlaybackState() {
  
          return (mMediaPlayer != null && mCurrentState != STATE_ERROR
  
                  && mCurrentState != STATE_IDLE && mCurrentState != STATE_PREPARING);
  
      }
  
  
  
      @Override
  
      public boolean canPause() {
  
          return false;
  
      }
  
  
  
      @Override
  
      public boolean canSeekBackward() {
  
          return false;
  
      }
  
  
  
      @Override
  
      public boolean canSeekForward() {
  
          return false;
  
      }
  
  
  
      @Override
  
      public int getAudioSessionId() {
  
          return -1;
  
      }
  
  
  
      SurfaceTextureListener mSurfaceTextureListener = new SurfaceTextureListener() {
  
          @Override
  
          public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
  
              mSurface = new Surface(surface);
  
              openVideo();
  
          }
  
  
  
          @Override
  
          public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
  
              boolean isValidState = (mTargetState == STATE_PLAYING);
  
              boolean hasValidSize = (mVideoWidth == width && mVideoHeight == height);
  
              if (mMediaPlayer != null && isValidState && hasValidSize) {
  
                  start();
  
              }
  
          }
  
  
  
          @Override
  
          public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
  
              if (mMediaPlayer != null) {
  
                  mMediaPlayer.reset();
  
                  mMediaPlayer.release();
  
                  mMediaPlayer = null;
  
              }
  
  
  
              if (mSurface != null) {
  
                  mSurface.release();
  
                  mSurface = null;
  
              }
  
  
  
              return true;
  
          }
  
  
  
          @Override
  
          public void onSurfaceTextureUpdated(final SurfaceTexture surface) {
  
  
  
          }
  
      };
  
  
  
      @Override
  
      protected void onVisibilityChanged(View changedView, int visibility) {
  
          super.onVisibilityChanged(changedView, visibility);
  
  
  
          if (visibility == View.INVISIBLE || visibility == View.GONE) {
  
              if (isPlaying()) {
  
                  stopPlayback();
  
              }
  
          }
  
      }
  
  
  
      public float getScale() {
  
          return mScale;
  
      }
  
  
  
      private void initVideo() {
  
          try {
  
                  int width = getWidth();
  
                  int height = getHeight();
  
                  mScaleX = 1.0f;
  
                  mScaleY = 1.0f;
  
                  mPositionX = 0;
  
                  mPositionY = 0;
  
                  mBoundX = 0;
  
                  mBoundY = 0;
  
                  mMatrix = new Matrix();
  
  
  
                  mScaleX = (float) mVideoWidth / width;
  
                  mScaleY = (float) mVideoHeight / height;
  
  
  
                  mBoundX = width - mVideoWidth / mScaleY;
  
                  mBoundY = height - mVideoHeight / mScaleX;
  
  
  
                  if (mScaleX < mScaleY) {
  
                      mScale = mScaleX;
  
                      mScaleY = mScaleY * (1.0f / mScaleX);
  
                      mScaleX = 1.0f;
  
                      mBoundX = 0;
  
                  } else {
  
                      mScale = mScaleY;
  
                      mScaleX = mScaleX * (1.0f / mScaleY);
  
                      mScaleY = 1.0f;
  
                      mBoundY = 0;
  
                  }
  
  
  
                  mMatrix = new Matrix();
  
                  mMatrix.setScale(mScaleX, mScaleY);
  
                  setTransform(mMatrix);
  
          } catch (NumberFormatException e) {
  
              e.printStackTrace();
  
          }
  
      }
  
  
  
      public void updateViewPosition(float x, float y) {
  
  
  
          float nextX = mPositionX + x;
  
          float nextY = mPositionY + y;
  
  
  
          if(mScaleX == 1.0f) {
  
              x = 0;
  
          } else {
  
              if(nextX > 0) {
  
                  x = -mPositionX;
  
                  mPositionX = mPositionX + x;
  
              } else if(nextX < mBoundX) {
  
                  x = mBoundX - mPositionX;
  
                  mPositionX = mPositionX + x;
  
              } else {
  
                  mPositionX = nextX;
  
              }
  
          }
  
  
  
          if(mScaleY == 1.0f) {
  
              y = 0;
  
          } else {
  
              if(nextY > 0) {
  
                  y = -mPositionY;
  
                  mPositionY = mPositionY + y;
  
              } else if(nextY < mBoundY) {
  
                  y = mBoundY - mPositionY;
  
                  mPositionY = mPositionY + y;
  
              } else {
  
                  mPositionY = nextY;
  
              }
  
          }
  
  
  
          if(mOnTranslatePositionListener != null) {
  
              mOnTranslatePositionListener.onTranslatePosition(mPositionX, mPositionY, mPositionX * -mScale, mPositionY * -mScale);
  
          }
  
  
  
          mMatrix.postTranslate(x, y);
  
          setTransform(mMatrix);
  
          invalidate();
  
      }
  
  
  
  //  public void setOriginalRatio() {
  
  //      if(mVideoWidth != 0 && mVideoHeight != 0) {
  
  //          int gcd = gcd(mVideoWidth, mVideoHeight);
  
  //          setRatio(mVideoWidth / gcd, mVideoHeight / gcd);
  
  //      }
  
  //  }
  
  
  
      public int gcd(int n, int m) {
  
          while (m != 0) {
  
              int t = n % m;
  
              n = m;
  
              m = t;
  
          }
  
  
  
          return Math.abs(n);
  
      }
  
  
  
  //  public void setRatio(float ratioWidth, float ratioHeight) {
  
  //      mRatioWidth = ratioWidth;
  
  //      mRatioHeight = ratioHeight;
  
  //
  
  //      int seek = getCurrentPosition();
  
  //
  
  //      requestLayout();
  
  //      invalidate();
  
  //      openVideo();
  
  //
  
  //      seekTo(seek);
  
  //  }
  
  
  
  
  
      public float getRatioWidth() {
  
          return mRatioWidth;
  
      }
  
  
  
      public float getRatioHeight() {
  
          return mRatioHeight;
  
      }
  
  
  
      public float getRealPositionX() {
  
          return mPositionX * -mScale;
  
      }
  
  
  
      public float getRealPositionY() {
  
          return mPositionY * -mScale;
  
      }
  
  
  
      public int getVideoWidth() {
  
          return mVideoWidth;
  
      }
  
  
  
      public int getVideoHeight() {
  
          return mVideoHeight;
  
      }
  
  
  
      public int getRotate() {
  
          return mRotate;
  
      }
  
  
  
      public void setOnTranslatePositionListener(OnTranslatePositionListener pOnTranslatePositionListener) {
  
          mOnTranslatePositionListener = pOnTranslatePositionListener;
  
      }
  
  
  
      public void setContext(Context context) {
  
          this.context = context;
  
      }
  
  
  
      public interface OnTranslatePositionListener {
  
          public abstract void onTranslatePosition(float x, float y, float rx, float ry);
  
      }
  
  }

  FFMPEG for cropping particular portion

  ffmpeg -i /sdcard/videokit/in.mp4 -filter:v crop=720:1088:0:0 -c:a copy /sdcard/videokit/out.mp4

  public class SimpleExample extends Activity {
  
  
  
      String workFolder = null;
  
      String demoVideoFolder = null;
  
      String demoVideoPath = null;
  
      String vkLogPath = null;
  
      private boolean commandValidationFailedFlag = false;
  
  
  
  
  
      @Override
  
      public void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.ffmpeg_demo_client_1);
  
  
  
          demoVideoFolder = Environment.getExternalStorageDirectory().getAbsolutePath() + "/videokit/";
  
          demoVideoPath = demoVideoFolder + "in.mp4";
  
  
  
          Log.i(Prefs.TAG, getString(R.string.app_name) + " version: " + GeneralUtils.getVersionName(getApplicationContext()) );
  
          workFolder = getApplicationContext().getFilesDir().getAbsolutePath() + "/";
  
          //Log.i(Prefs.TAG, "workFolder: " + workFolder);
  
          vkLogPath = workFolder + "vk.log";
  
  
  
          GeneralUtils.copyLicenseFromAssetsToSDIfNeeded(this, workFolder);
  
          GeneralUtils.copyDemoVideoFromAssetsToSDIfNeeded(this, demoVideoFolder);
  
  
  
          Button invoke =  (Button)findViewById(R.id.invokeButton);
  
          invoke.setOnClickListener(new OnClickListener() {
  
              public void onClick(View v){
  
                  Log.i(Prefs.TAG, "run clicked.");
  
                  if (GeneralUtils.checkIfFileExistAndNotEmpty(demoVideoPath)) {
  
                      new TranscdingBackground(SimpleExample.this).execute();
  
                  }
  
                  else {
  
                      Toast.makeText(getApplicationContext(), demoVideoPath + " not found", Toast.LENGTH_LONG).show();
  
                  }
  
              }
  
          });
  
  
  
          int rc = GeneralUtils.isLicenseValid(getApplicationContext(), workFolder);
  
          Log.i(Prefs.TAG, "License check RC: " + rc);
  
      }
  
  
  
      public class TranscdingBackground extends AsyncTask
  
      {
  
  
  
          ProgressDialog progressDialog;
  
          Activity _act;
  
          String commandStr;
  
  
  
          public TranscdingBackground (Activity act) {
  
              _act = act;
  
          }
  
  
  
  
  
  
  
          @Override
  
          protected void onPreExecute() {
  
              EditText commandText = (EditText)findViewById(R.id.CommandText);
  
              commandStr = commandText.getText().toString();
  
  
  
              progressDialog = new ProgressDialog(_act);
  
              progressDialog.setMessage("FFmpeg4Android Transcoding in progress...");
  
              progressDialog.show();
  
  
  
          }
  
  
  
          protected Integer doInBackground(String... paths) {
  
              Log.i(Prefs.TAG, "doInBackground started...");
  
  
  
              // delete previous log
  
              boolean isDeleted = GeneralUtils.deleteFileUtil(workFolder + "/vk.log");
  
              Log.i(Prefs.TAG, "vk deleted: " + isDeleted);
  
  
  
              PowerManager powerManager = (PowerManager)_act.getSystemService(Activity.POWER_SERVICE);
  
              WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "VK_LOCK");
  
              Log.d(Prefs.TAG, "Acquire wake lock");
  
              wakeLock.acquire();
  
  
  
              ///////////// Set Command using code (overriding the UI EditText) /////
  
              //commandStr = "ffmpeg -y -i /sdcard/videokit/in.mp4 -strict experimental -s 320x240 -r 30 -aspect 3:4 -ab 48000 -ac 2 -ar 22050 -vcodec mpeg4 -b 2097152 /sdcard/videokit/out.mp4";
  
              //String[] complexCommand = {"ffmpeg", "-y" ,"-i", "/sdcard/videokit/in.mp4","-strict","experimental","-s", "160x120","-r","25", "-vcodec", "mpeg4", "-b", "150k", "-ab","48000", "-ac", "2", "-ar", "22050", "/sdcard/videokit/out.mp4"};
  
              ///////////////////////////////////////////////////////////////////////
  
  
  
  
  
              LoadJNI vk = new LoadJNI();
  
              try {
  
  
  
  
  
                  vk.run(GeneralUtils.utilConvertToComplex(commandStr), workFolder, getApplicationContext());
  
  
  
  
  
  
  
  
  
                  GeneralUtils.copyFileToFolder(vkLogPath, demoVideoFolder);
  
  
  
  
  
              } catch (Throwable e) {
  
                  Log.e(Prefs.TAG, "vk run exeption.", e);
  
              }
  
              finally {
  
                  if (wakeLock.isHeld())
  
                      wakeLock.release();
  
                  else{
  
                      Log.i(Prefs.TAG, "Wake lock is already released, doing nothing");
  
                  }
  
              }
  
              Log.i(Prefs.TAG, "doInBackground finished");
  
              return Integer.valueOf(0);
  
          }
  
  
  
          protected void onProgressUpdate(Integer... progress) {
  
          }
  
  
  
          @Override
  
          protected void onCancelled() {
  
              Log.i(Prefs.TAG, "onCancelled");
  
              //progressDialog.dismiss();
  
              super.onCancelled();
  
          }
  
  
  
  
  
          @Override
  
          protected void onPostExecute(Integer result) {
  
              Log.i(Prefs.TAG, "onPostExecute");
  
              progressDialog.dismiss();
  
              super.onPostExecute(result);
  
  
  
              // finished Toast
  
              String rc = null;
  
              if (commandValidationFailedFlag) {
  
                  rc = "Command Vaidation Failed";
  
              }
  
              else {
  
                  rc = GeneralUtils.getReturnCodeFromLog(vkLogPath);
  
              }
  
              final String status = rc;
  
              SimpleExample.this.runOnUiThread(new Runnable() {
  
                  public void run() {
  
                      Toast.makeText(SimpleExample.this, status, Toast.LENGTH_LONG).show();
  
                      if (status.equals("Transcoding Status: Failed")) {
  
                          Toast.makeText(SimpleExample.this, "Check: " + vkLogPath + " for more information.", Toast.LENGTH_LONG).show();
  
                      }
  
                  }
  
              });
  
          }
  
  
  
      }
  
  
  
  
  
  }