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• ffmpeg convert images to mp4 error

  31 mai 2013, par Ryan Saxe

  So I have a script that grabs a bunch of images from the web and then converts them into a movie. Yet I get a whole bunch of errors when I run it.

  First let me show what I am running and then I will post the error because it's huge :

  #for gif
  
  #call('convert -set delay 5 -loop 0 ' + folder + '*.jpg ' + name + '.gif', shell=True)
  
  #for mov
  
  #call('convert -quality 100 ' + folder + '*.jpg ' + name + '.mov', shell=True)
  
  #for organized movie
  
  call('ffmpeg -r 10 -b 1800 -i ' + folder + '%0' + str(size) + 'd.jpg ' + name + '.mp4', shell=True)

  So the commented out versions work fine, but I need to use the 3rd version ! Here is the response I get from ffmpeg :

  ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Mar 31 2013 21:55:33 with Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
  
    configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libspeex --enable-libfreetype --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid
  
    libavutil      52. 18.100 / 52. 18.100
  
    libavcodec     54. 92.100 / 54. 92.100
  
    libavformat    54. 63.104 / 54. 63.104
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 42.103 /  3. 42.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  Please use -b:a or -b:v, -b is ambiguous
  
  [mjpeg @ 0x7f8cc402a800] [IMGUTILS @ 0x7fff5a680ae0] Picture size 10835x53928 is invalid
  
      Last message repeated 26 times
  
  [mjpeg @ 0x7f8cc402a800] Found EOI before any SOF, ignoring
  
  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (cf)
  
  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (c8)
  
  [mjpeg @ 0x7f8cc402a800] [IMGUTILS @ 0x7fff5a680ae0] Picture size 54310x53928 is invalid
  
  [mjpeg @ 0x7f8cc402a800] only 8 bits/component accepted
  
      Last message repeated 8 times
  
  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (c5)
  
  [mjpeg @ 0x7f8cc402a800] [IMGUTILS @ 0x7fff5a680ae0] Picture size 10835x53928 is invalid
  
      Last message repeated 12 times
  
  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (cf)
  
  [mjpeg @ 0x7f8cc402a800] only 8 bits/component accepted
  
  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (cf)
  
  [mjpeg @ 0x7f8cc402a800] only 8 bits/component accepted
  
  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (cf)
  
  [mjpeg @ 0x7f8cc402a800] only 8 bits/component accepted
  
  [image2 @ 0x7f8cc4029c00] decoding for stream 0 failed
  
  [image2 @ 0x7f8cc4029c00] Could not find codec parameters for stream 0 (Video: mjpeg): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  /Users/ryansaxe/Desktop/kaggle_parkinsons/MOVIES/%03d.jpg: could not find codec parameters

  Note :

  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (cf)
[mjpeg @ 0x7f8cc402a800] only 8 bits/component accepted

  repeated about 30 times, but i cut it out of the traceback because it was overwhelming.

  Question : What did I do wrong and how do I fix it ?

  Edit :

  I download the jpeg files using the urllib python library's urlretrieve. This is how I save them :

  for src,name in zip(urls,range(len(urls))):
  
      file_name = folder + str(name) + '.jpg'
  
      urlretrieve(src, file_name)

• PHP script to close the ffmpeg session

  14 octobre 2016, par Kiran Kumar S

  We’ve made a PHP script to run the ffmpeg on a Windows 7 machine in background as below :

  <?php
  
  date_default_timezone_set('Asia/Kolkata');
  
  $date = date('dmY_His', time());
  
  $outputdst = ("C:/Users/test/Desktop/$date");
  
  $cmd = "ffmpeg -f dshow -i video=screen-capture-recorder -r 15 -t 360 $outputdst.avi ";
  
  
  
  $WshShell = new COM("WScript.Shell");
  
  $WshShell->Run($cmd, 0, false);
  
  ?>

  The script is able to start the screen recording. Now the issue is if I kill the process, then the recorded file is not playing. How to stop ffmpeg without corrupting the recorded file ?

• ffmpeg video recording hangs in Emacs

  3 mars, par Nutritioustim

  A. Using ffmpeg, both of these audio and video captures work correctly in a shell.

  


  # Audio
ffmpeg -y -f avfoundation -t 5 -i :0 -c:a aac audio-recording.m4a

# Video
# i. video only
# ii. audio & video
ffmpeg -y -f avfoundation -framerate 30 -i 0 -t 10 -c:v libx264 -preset fast -pix_fmt yuv420p video-recording.mp4
ffmpeg -y -f avfoundation -framerate 30 -pixel_format "uyvy422" -i 0:0 -t 10 -c:v libx264 -preset fast -pix_fmt yuv420p audio-video-recording.mp4


  


  B. In Emacs (29.4, "Emacs For Mac OS X"), this audio code block completes, and prints the successful callback message ffmpeg-audio , finished.

  


  # Audio, completes successfully
(setq ffmpeg-record--process
      (apply 'start-process "ffmpeg-audio" "*ffmpeg-recording*"
             (list "ffmpeg" "-y" "-f" "avfoundation" "-i" ":0" "-t" "10" "-c:a" "aac" "audio-recording.m4a")))

(set-process-sentinel
 ffmpeg-record--process
 (lambda (process event)
   (message "%s , %s" process event)))


  


  But the video code block hangs, and does not complete with any output message.

  


  # Video, hangs after an initial message
(setq ffmpeg-record--process
      (apply 'start-process "ffmpeg-video" "*ffmpeg-recording*"
             (list "ffmpeg" "-y" "-f" "avfoundation" "-framerate" "30" "-pixel_format" "uyvy422" "-i" "0:none" "-t" "10" "-c:v"
                   "libx264" "-preset" "fast" "-pix_fmt" "yuv420p" "video-recording.mp4")))
(set-process-sentinel
 ffmpeg-record--process
 (lambda (process event)
   (message "%s , %s" process event)))


  


  C. Running diagnostics on the ffmpeg-record--process variable shows the process is still running even after the 10 second duration (-t 10) is long over.

  


  (message "Process: %s, PID: %s, Status: %s"
         (process-name ffmpeg-record--process)
         (process-id ffmpeg-record--process)
         (process-status ffmpeg-record--process))


  


  D. Presumably, it is start-process that is not properly handling the invocation.

  


  But why then is the ffmpeg video invocation hanging, only in Emacs (not in the shell)... when the (Emacs) audio invocation completes fine ?