Recherche avancée

Sur d’autres sites (3877)

• How to increase my sever ability to run ffmpeg command faster and then execute my php code

  9 janvier 2018, par Femzy

  Hello I have a problem with the ffmpeg command, when i tried to use a text file that has plenty of words like more than 300 words, it generate the video but also the rest of my code did not executed, i wanted to save the path of the generated video to the database after it is created and then move to the next page but the server stop after it execute the command and not run the rest of the code.
  Also i tried to use "text" only and pass the string to the Text intead of "textfile" but I Got the Below error

  Error reinitializing filters!
  
  Failed to inject frame into filter network: Invalid argument
  
  Error while processing the decoded data for stream #0:0
  
  [AVIOContext @ 0x329ca80] Statistics: 0 seeks, 0 writeouts
  
  [AVIOContext @ 0x3293680] Statistics: 32768 bytes read, 0 seeks
  
  Conversion failed!

  Please i want to know which one is the best practice either to use "text" or "textfile" and how i can use them to not having any error.. Thanks For helping me in advance
  This is my PHP codes that includes the ffmpeg commands

  $cmds ='ffmpeg -loop 1 -i '.$image_file.' -vf scale=-2:1080,drawtext="text='.$directory.':expansion=normal:fontfile=FreeSerif.otf: y=h-line_h-20:x=-100*t: fontcolor=white: fontsize=50" -pix_fmt yuv420p -t '.$words_count.' -movflags +faststart '.$file_dir.' -report';
  
                                  echo shell_exec($cmds);
  
                                  $video_files = array(
  
                                          'user_id' => $_SESSION['user_id'],
  
                                          'text_file_id' => $user_id,
  
                                          'video_file' => $file_name,
  
                                          'created' => time()
  
                                  );
  
                                  if($user->insert('db_table', $video_files)){
  
                                          if (file_exists($file_dir)) {
  
                                              $_SESSION['d_file'] = $file_dir;
  
                                              $msg['success'] = "Success";
  
                                          } else {
  
                                              $msg['error'] = "Sorry the file was not created";
  
                                          }                                                
  
                                  }else{
  
                                          $msg['error'] = "Sorry there was database error";
  
                                  }

• How to record a webcam to a file outside of X11 ?

  13 décembre 2017, par Dav Clark

  I’m working with teachers to automatically record their classes, so we can review them and improve the quality of teaching. We have computers running Ubuntu 17.10 with multiple webcams in a couple of classrooms - but I could run other software if it makes this task easier.

  I can successfully record a stream from the webcam to an h264 encoded file using gstreamer. The following should work for most people with gstreamer installed, but I’ve got fancier pipelines using vaapi that can simultaneously encode multiple 4k streams on a NUC with room to spare ! My point is that Gstreamer works great when I’m typing at a terminal in the GUI. The example :

  .\gst-launch-1.0.exe -e autovideosrc ! videoconvert ! \
  
    openh264enc max-bitrate=256000 ! h264parse ! \
  
    mp4mux ! filesink location=somefile.mp4

  I imagine I could also do this with ffmpeg, or OpenCV, or maybe even VLC (I can record a webcam via the GUI, so I guess I could use that to generate a command line ?).

  But when I tried any of the above, for example, via SSH, I get errors from GStreamer and OpenCV, and blank videos from ffmpeg (I haven’t tried VLC because I don’t currently have access to these machines). I need to automate - but I could potentially leave a user logged in. I just need to have some way to capture webcam to disk with some amount of reasonable compression.

  I naively thought I could throw something like the above into a cron job and I’d be good to go (intending to send a SIGINT to end recording). But anything that can be automatically scheduled somehow would be great.

  EDIT : Below is an approach I’m trying using ffmpeg. You can see from the output that I can’t figure out how to specify pixel_format in a way that ffmpeg pays attention to ! First, the command (using mkv because that seems to be a "low-stress" format, but have also tried mov and mp4) :

  ffmpeg -hwaccel vaapi -vaapi_device /dev/dri/renderD128 \
  
    -f v4l2 -framerate 30 -video_size hd720 -pixel_format yuv420p -i /dev/video1 output.mkv

  Like I said, I’m trying to get hardware acceleration, and you can see below that VAAPI is working (but I think just for decoding). You can easily remove the options from the first line, and I get similar results either way. I didn’t include the header with compile options and library versions, as it’s standard Ubuntu 17.10.

  libva info: VA-API version 0.40.0
  
  libva info: va_getDriverName() returns 0
  
  libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
  
  libva info: Found init function __vaDriverInit_0_40
  
  libva info: va_openDriver() returns 0
  
  Input #0, video4linux2,v4l2, from '/dev/video1':
  
    Duration: N/A, start: 42437.238243, bitrate: 442368 kb/s
  
      Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1280x720, 442368 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
  
  File 'output.mkv' already exists. Overwrite ? [y/N] y
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  No pixel format specified, yuv422p for H.264 encoding chosen.
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  [libx264 @ 0x55d1a26a71a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x55d1a26a71a0] profile High 4:2:2, level 3.1, 4:2:2 8-bit
  
  [libx264 @ 0x55d1a26a71a0] 264 - core 148 r2795 aaa9aa8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, matroska, to 'output.mkv':
  
    Metadata:
  
      encoder         : Lavf57.71.100
  
      Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv422p, 1280x720, q=-1--1, 30 fps, 1k tbn, 30 tbc
  
      Metadata:
  
        encoder         : Lavc57.89.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  Past duration 0.717049 too large
  
  Past duration 0.879128 too large
  
  frame=  567 fps= 16 q=27.0 size=    2156kB time=00:00:34.16 bitrate= 516.9kbits/s speed=0.938x

  I exit with ctrl-C. Which results in what appears to be an orderly exit :

  [libx264 @ 0x55d1a26a71a0] frame I:11    Avg QP:15.75  size: 18573
  
  [libx264 @ 0x55d1a26a71a0] frame P:2176  Avg QP:19.91  size:  4435
  
  [libx264 @ 0x55d1a26a71a0] frame B:173   Avg QP:20.00  size:  3232
  
  [libx264 @ 0x55d1a26a71a0] consecutive B-frames: 90.1%  0.1%  0.6%  9.2%
  
  [libx264 @ 0x55d1a26a71a0] mb I  I16..4: 34.0% 56.1%  9.8%
  
  [libx264 @ 0x55d1a26a71a0] mb P  I16..4:  0.1%  1.2%  0.0%  P16..4: 32.7%  3.1%  6.1%  0.0%  0.0%    skip:56.8%
  
  [libx264 @ 0x55d1a26a71a0] mb B  I16..4:  0.0%  0.3%  0.0%  B16..8: 31.9%  0.7%  0.1%  direct: 1.4%  skip:65.6%  L0:41.8% L1:57.9% BI: 0.3%
  
  [libx264 @ 0x55d1a26a71a0] 8x8 transform intra:81.2% inter:92.4%
  
  [libx264 @ 0x55d1a26a71a0] coded y,uvDC,uvAC intra: 25.4% 20.1% 2.1% inter: 10.2% 7.4% 0.0%
  
  [libx264 @ 0x55d1a26a71a0] i16 v,h,dc,p: 78% 10%  7%  5%
  
  [libx264 @ 0x55d1a26a71a0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  7%  6% 72%  2%  3%  3%  2%  2%  3%
  
  [libx264 @ 0x55d1a26a71a0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 34% 21% 25%  4%  5%  3%  4%  1%  3%
  
  [libx264 @ 0x55d1a26a71a0] i8c dc,h,v,p: 69% 14% 15%  2%
  
  [libx264 @ 0x55d1a26a71a0] Weighted P-Frames: Y:1.7% UV:0.1%
  
  [libx264 @ 0x55d1a26a71a0] ref P L0: 49.3%  2.7% 29.6% 18.1%  0.3%
  
  [libx264 @ 0x55d1a26a71a0] ref B L0: 69.3% 24.1%  6.6%
  
  [libx264 @ 0x55d1a26a71a0] ref B L1: 86.6% 13.4%
  
  [libx264 @ 0x55d1a26a71a0] kb/s:529.95
  
  Exiting normally, received signal 2.

• FFmpeg, MPEG4 video rotate and Windows

  25 décembre 2017, par user3768884

  I have this kind of video recorded in some Samsung Galaxy phone (info from : "ffprobe -v error -show_format -show_streams filename.mp4")

  [STREAM]
  
  index=0
  
  codec_name=h264
  
  codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
  
  profile=High
  
  codec_type=video
  
  codec_time_base=7048499/423000000
  
  codec_tag_string=avc1
  
  codec_tag=0x31637661
  
  width=1920
  
  height=1080
  
  coded_width=1920
  
  coded_height=1080
  
  has_b_frames=0
  
  sample_aspect_ratio=0:1
  
  display_aspect_ratio=0:1
  
  pix_fmt=yuv420p
  
  level=40
  
  color_range=unknown
  
  color_space=unknown
  
  color_transfer=unknown
  
  color_primaries=unknown
  
  chroma_location=left
  
  field_order=unknown
  
  timecode=N/A
  
  refs=1
  
  is_avc=true
  
  nal_length_size=4
  
  id=N/A
  
  r_frame_rate=30/1
  
  avg_frame_rate=211500000/7048499
  
  time_base=1/90000
  
  start_pts=0
  
  start_time=0.000000
  
  duration_ts=7048499
  
  duration=78.316656
  
  bit_rate=17010472
  
  max_bit_rate=N/A
  
  bits_per_raw_sample=8
  
  nb_frames=2350
  
  nb_read_frames=N/A
  
  nb_read_packets=N/A
  
  DISPOSITION:default=1
  
  DISPOSITION:dub=0
  
  DISPOSITION:original=0
  
  DISPOSITION:comment=0
  
  DISPOSITION:lyrics=0
  
  DISPOSITION:karaoke=0
  
  DISPOSITION:forced=0
  
  DISPOSITION:hearing_impaired=0
  
  DISPOSITION:visual_impaired=0
  
  DISPOSITION:clean_effects=0
  
  DISPOSITION:attached_pic=0
  
  DISPOSITION:timed_thumbnails=0
  
  TAG:rotate=90
  
  TAG:creation_time=2017-12-17T13:42:14.000000Z
  
  TAG:language=eng
  
  TAG:handler_name=VideoHandle
  
  [SIDE_DATA]
  
  side_data_type=Display Matrix
  
  displaymatrix=
  
  00000000:            0       65536           0
  
  00000001:       -65536           0           0
  
  00000002:            0           0  1073741824
  
  
  
  rotation=-90
  
  [/SIDE_DATA]
  
  [/STREAM]
  
  [STREAM]
  
  index=1
  
  codec_name=aac
  
  codec_long_name=AAC (Advanced Audio Coding)
  
  profile=LC
  
  codec_type=audio
  
  codec_time_base=1/48000
  
  codec_tag_string=mp4a
  
  codec_tag=0x6134706d
  
  sample_fmt=fltp
  
  sample_rate=48000
  
  channels=2
  
  channel_layout=stereo
  
  bits_per_sample=0
  
  id=N/A
  
  r_frame_rate=0/0
  
  avg_frame_rate=0/0
  
  time_base=1/48000
  
  start_pts=0
  
  start_time=0.000000
  
  duration_ts=3772416
  
  duration=78.592000
  
  bit_rate=126154
  
  max_bit_rate=128000
  
  bits_per_raw_sample=N/A
  
  nb_frames=3684
  
  nb_read_frames=N/A
  
  nb_read_packets=N/A
  
  DISPOSITION:default=1
  
  DISPOSITION:dub=0
  
  DISPOSITION:original=0
  
  DISPOSITION:comment=0
  
  DISPOSITION:lyrics=0
  
  DISPOSITION:karaoke=0
  
  DISPOSITION:forced=0
  
  DISPOSITION:hearing_impaired=0
  
  DISPOSITION:visual_impaired=0
  
  DISPOSITION:clean_effects=0
  
  DISPOSITION:attached_pic=0
  
  DISPOSITION:timed_thumbnails=0
  
  TAG:creation_time=2017-12-17T13:42:14.000000Z
  
  TAG:language=eng
  
  TAG:handler_name=SoundHandle
  
  [/STREAM]
  
  [FORMAT]
  
  filename=original_galaxy.mp4
  
  nb_streams=2
  
  nb_programs=0
  
  format_name=mov,mp4,m4a,3gp,3g2,mj2
  
  format_long_name=QuickTime / MOV
  
  start_time=0.000000
  
  duration=78.592000
  
  size=167808936
  
  bit_rate=17081528
  
  probe_score=100
  
  TAG:major_brand=isom
  
  TAG:minor_version=0
  
  TAG:compatible_brands=isom3gp4
  
  TAG:creation_time=2017-12-17T13:42:14.000000Z
  
  [/FORMAT]

  Since all my media players does not support rotate-knowledge, I have turned the video over again, and at the same time slightly decreased the resolution of command "ffmpeg -i "input.mp4" -vf "scale=720:1280,transpose=0,transpose=0" -c:a copy "output.mp4""

  [STREAM]
  
  index=0
  
  codec_name=h264
  
  codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
  
  profile=High
  
  codec_type=video
  
  codec_time_base=1/60
  
  codec_tag_string=avc1
  
  codec_tag=0x31637661
  
  width=720
  
  height=1280
  
  coded_width=720
  
  coded_height=1280
  
  has_b_frames=2
  
  sample_aspect_ratio=0:1
  
  display_aspect_ratio=0:1
  
  pix_fmt=yuv420p
  
  level=31
  
  color_range=unknown
  
  color_space=unknown
  
  color_transfer=unknown
  
  color_primaries=unknown
  
  chroma_location=left
  
  field_order=unknown
  
  timecode=N/A
  
  refs=1
  
  is_avc=true
  
  nal_length_size=4
  
  id=N/A
  
  r_frame_rate=30/1
  
  avg_frame_rate=30/1
  
  time_base=1/15360
  
  start_pts=0
  
  start_time=0.000000
  
  duration_ts=1203717
  
  duration=78.366992
  
  bit_rate=2570692
  
  max_bit_rate=N/A
  
  bits_per_raw_sample=8
  
  nb_frames=2351
  
  nb_read_frames=N/A
  
  nb_read_packets=N/A
  
  DISPOSITION:default=1
  
  DISPOSITION:dub=0
  
  DISPOSITION:original=0
  
  DISPOSITION:comment=0
  
  DISPOSITION:lyrics=0
  
  DISPOSITION:karaoke=0
  
  DISPOSITION:forced=0
  
  DISPOSITION:hearing_impaired=0
  
  DISPOSITION:visual_impaired=0
  
  DISPOSITION:clean_effects=0
  
  DISPOSITION:attached_pic=0
  
  DISPOSITION:timed_thumbnails=0
  
  TAG:language=eng
  
  TAG:handler_name=VideoHandler
  
  [/STREAM]
  
  [STREAM]
  
  index=1
  
  codec_name=aac
  
  codec_long_name=AAC (Advanced Audio Coding)
  
  profile=LC
  
  codec_type=audio
  
  codec_time_base=1/48000
  
  codec_tag_string=mp4a
  
  codec_tag=0x6134706d
  
  sample_fmt=fltp
  
  sample_rate=48000
  
  channels=2
  
  channel_layout=stereo
  
  bits_per_sample=0
  
  id=N/A
  
  r_frame_rate=0/0
  
  avg_frame_rate=0/0
  
  time_base=1/48000
  
  start_pts=0
  
  start_time=0.000000
  
  duration_ts=3772416
  
  duration=78.592000
  
  bit_rate=126154
  
  max_bit_rate=126154
  
  bits_per_raw_sample=N/A
  
  nb_frames=3684
  
  nb_read_frames=N/A
  
  nb_read_packets=N/A
  
  DISPOSITION:default=1
  
  DISPOSITION:dub=0
  
  DISPOSITION:original=0
  
  DISPOSITION:comment=0
  
  DISPOSITION:lyrics=0
  
  DISPOSITION:karaoke=0
  
  DISPOSITION:forced=0
  
  DISPOSITION:hearing_impaired=0
  
  DISPOSITION:visual_impaired=0
  
  DISPOSITION:clean_effects=0
  
  DISPOSITION:attached_pic=0
  
  DISPOSITION:timed_thumbnails=0
  
  TAG:language=eng
  
  TAG:handler_name=SoundHandler
  
  [/STREAM]
  
  [FORMAT]
  
  filename=from_ffmpeg.mp4
  
  nb_streams=2
  
  nb_programs=0
  
  format_name=mov,mp4,m4a,3gp,3g2,mj2
  
  format_long_name=QuickTime / MOV
  
  start_time=0.000000
  
  duration=78.592000
  
  size=26503544
  
  bit_rate=2697836
  
  probe_score=100
  
  TAG:major_brand=isom
  
  TAG:minor_version=512
  
  TAG:compatible_brands=isomiso2avc1mp41
  
  TAG:encoder=Lavf57.41.100
  
  [/FORMAT]

  This works very well in VLC, for example. However, Windows Media Player or Samsung TV does not play it. Windows Explorer does not even show a video thumbnail, so the video file is broken by Windows.

  Is not FFmpeg able to produce a standard MPEG4 file, or what the hell is this about ? I’ve tried all the alternatives presented, such as "-fflags +genpts", "-fflags genpts", "-movflags faststart", "-movflags +faststart", "pix_fmt=yuv420p" etc. but nothing worked.

  The sound I copied directly.