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• php ming flash slideshow to mp4/avi

  19 août 2013, par Stefan

  After hours of searching and trying i finally got a nice script together that generates a good looking Flash .swf file with a nice transaction in between de images.
  It works great if you access the swf file directly in a browser, depending on the amount of images the flash created takes anywhere between 10 and 60 seconds.
  But when uploading to Youtube the movie created flashed by in one second.
  Because swf isnt really a accepted fileformat for Youtube we decided to convert the flash file to mp4 or avi using ffmpeg.
  Unfortunally that didnt work, it had the same effect as the youtube movie.
  We had a old version of ffmpeg and updated that to a recent version and tried to convert again with the same result.
  The main thing i see is that ffmpeg cant see the swf file duration and bitrate, they are both 'N/A' while were do set them in the php script.

  Now i have to admit i havent really tested with the new version because the commandline options are a little different but ill work on that after i post this.
  In the previous version we tried setting the framerate of the source swf file, but that didnt work either.

  Anyone here that can has a idea ? it would be greatly appriciated.

  PHP Ming Script :

        $fps = 30;
  
           foreach($objects as $objectId => $images){
  
                  // START FLASH MOVIE
  
                  $m = new SWFMovie();
  
                  $m->setDimension($width, $height);
  
                  $m->setBackground(0, 0, 0);
  
                  $m->setRate($fps);
  
                  $m->setFrames(count($images)*202); //count(images)* 2 breaks *($fps*$breakTime)+22(fadeOut))
  
  
  
                  $i = 0;
  
                  foreach($images as $image){
  
  
  
                      // REMOVE THE BACKGROUND IMAGE
  
                      if($behind){
  
                          $m->remove($behind);
  
                      }
  
                      // # REMOVE
  
  
  
                      // LOAD NEW IMAGE
  
                      $img = new SWFBitmap(fopen($image,"rb"));
  
                      $pic = $m->add($img);
  
                      $pic->setdepth(3);
  
                      // # LOAD
  
  
  
                      // BREAK TIME
  
                      for($j=1;$j<=($fps*$breakTime);$j++){
  
                          $m->nextFrame();
  
                      }
  
                      $m->remove($pic);
  
                      // # BREAK
  
  
  
                      // LOAD THE NEXT IMAGE AS BACKGROUND, IF LAST IMAGE, LOAD FIRST
  
                      $nextBackgrondImage =($images[$i+1]) ? $images[$i+1] : $images[0] ;
  
                      $img = new SWFBitmap(fopen($nextBackgrondImage,"rb"));
  
                      $behind = $m->add($img);
  
                      $behind->setdepth(2);
  
                      // # LOAD
  
  
  
                      // AND FADE OUT AGAIN
  
                      $img = fadeOut($image, $width, $height);
  
                      $pic = $m->add($img);
  
                      $pic->setdepth(3);
  
                      // # FADE OUT
  
  
  
                      // BREAK TIME
  
                      for($j=1;$j<=($fps*$breakTime);$j++){
  
                          $m->nextFrame();
  
                      }
  
                      $m->remove($pic);
  
                      # BREAK
  
                      $i++;
  
                  }       
  
                  $m->save('./flash/'.$nvmId.'_'.$objectId.'.swf');   
  
              unset($m); 
  
              }
  
  }

  FFMPEG version :

  root@server:~# ffmpeg -version
  
  \FFmpeg version SVN-r26402, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on Aug 15 2013 20:43:21 with gcc 4.4.5
  
    configuration: --enable-libmp3lame --enable-libtheora --enable-libx264 
  
    --enable-libgsm --enable-postproc --enable-libxvid --enable-libfaac --enable-pthreads 
  
    --enable-libvorbis --enable-gpl --enable-x11grab --enable-nonfree
  
    libavutil     50.36. 0 / 50.36. 0
  
    libavcore      0.16. 1 /  0.16. 1
  
    libavcodec    52.108. 0 / 52.108. 0
  
    libavformat   52.93. 0 / 52.93. 0
  
    libavdevice   52. 2. 3 / 52. 2. 3
  
    libavfilter    1.74. 0 /  1.74. 0
  
    libswscale     0.12. 0 /  0.12. 0
  
    libpostproc   51. 2. 0 / 51. 2. 0
  
  FFmpeg SVN-r26402
  
  libavutil     50.36. 0 / 50.36. 0
  
  libavcore      0.16. 1 /  0.16. 1
  
  libavcodec    52.108. 0 / 52.108. 0
  
  libavformat   52.93. 0 / 52.93. 0
  
  libavdevice   52. 2. 3 / 52. 2. 3
  
  libavfilter    1.74. 0 /  1.74. 0
  
  libswscale     0.12. 0 /  0.12. 0
  
  libpostproc   51. 2. 0 / 51. 2. 0

  FFMPEG command

  root@server:~# ffmpeg -r 30  -i '/pathTo/public_html/flash/73003_8962011.swf' -vcodec libx264 /pathTo/public_html/flash/out.mp4
  
  
  
  [swf @ 0x16c2510] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, swf, from '/pathTo/public_html/flash/73003_8962011.swf':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0.0: Video: mjpeg, yuvj420p, 360x480, 30 fps, 30 tbr, 30 tbn, 30 tbc
  
  [buffer @ 0x16d5850] w:360 h:480 pixfmt:yuvj420p
  
  [libx264 @ 0x16d4d80] broken ffmpeg default settings detected
  
  [libx264 @ 0x16d4d80] use an encoding preset (e.g. -vpre medium)
  
  [libx264 @ 0x16d4d80] preset usage: -vpre <speed> -vpre <profile>
  
  [libx264 @ 0x16d4d80] speed presets are listed in x264 --help
  
  [libx264 @ 0x16d4d80] profile is optional; x264 defaults to high
  
  Output #0, mp4, to &#39;/pathTo/public_html/out.mp4&#39;:
  
      Stream #0.0: Video: libx264, yuvj420p, 360x480, q=2-31, 200 kb/s, 90k tbn, 30 tbc
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
  Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  </profile></speed>

• FFMpeg : Webcam capture not fast enough. Ffmpeg dies half way (Linux)

  19 août 2013, par user763410

  I am trying to capture webcam output in liux/ubuntu. I have a chico webcam (lenovo laptop). I am running inside a VMWARE virtual machine. The capture is not proceeding beyond 10 seconds. can you please help.

  The command I used is :

  $ ffmpeg -y  -f video4linux2 -r 20 -s 160x120 -i /dev/video0 -acodec libfaac -ab 128k  /tmp/web.avi

  The most important message I am getting is :

  [video4linux2,v4l2 @ 0x9e43fa0] The v4l2 frame is 46448 bytes, but 153600 bytes are expected

  Complete message from ffmpeg :

  ffmpeg version N-55159-gf118b41 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Aug 18 2013 09:09:13 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
    configuration: --enable-libass --prefix=/opt/ffmpeg --enable-debug --enable-libfreetype
  
    libavutil      52. 40.100 / 52. 40.100
  
    libavcodec     55. 19.100 / 55. 19.100
  
    libavformat    55. 12.102 / 55. 12.102
  
    libavdevice    55.  3.100 / 55.  3.100
  
    libavfilter     3. 82.100 /  3. 82.100
  
    libswscale      2.  4.100 /  2.  4.100
  
    libswresample   0. 17.103 /  0. 17.103
  
  [video4linux2,v4l2 @ 0x9e43fa0] The V4L2 driver changed the video from 160x120 to 320x240
  
  [video4linux2,v4l2 @ 0x9e43fa0] The driver changed the time per frame from 1/20 to 1/15
  
  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 6424.338678, bitrate: 18432 kb/s
  
      Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 320x240, 18432 kb/s, 15 fps, 15 tbr, 1000k tbn, 1000k tbc
  
  Codec AVOption ab (set bitrate (in bits/s)) specified for output file #0 (/tmp/web.avi) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
  
  Output #0, avi, to '/tmp/web.avi':
  
    Metadata:
  
      ISFT            : Lavf55.12.102
  
      Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x240, q=2-31, 200 kb/s, 20 tbn, 20 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo -> mpeg4)
  
  Press [q] to stop, [?] for help
  
  [video4linux2,v4l2 @ 0x9e43fa0] The v4l2 frame is 46448 bytes, but 153600 bytes are expected
  
  /dev/video0: Invalid data found when processing input
  
  frame=   29 fps= 14 q=3.5 Lsize=      87kB time=00:00:01.45 bitrate= 490.0kbits/s    
  
  video:80kB audio:0kB subtitle:0 global headers:0kB muxing overhead 7.760075%
  
  [video4linux2,v4l2 @ 0x9e43fa0] Some buffers are still owned by the caller on close.

• Linux : Webcam capture not fast enough. Ffmpeg dies half way

  19 août 2013, par user763410

  I am trying to capture webcam output in liux/ubuntu. I have a chico webcam (lenovo laptop). I am running inside a VMWARE virtual machine. The capture is not proceeding beyond 10 seconds. can you please help.

  The command I used is :

  $ ffmpeg -y -f video4linux2 -r 20 -s 160x120 -i /dev/video0 -acodec libfaac -ab 128k /tmp/web.avi

  The most important message I am getting is :

  [video4linux2,v4l2 @ 0x9e43fa0] The v4l2 frame is 46448 bytes, but 153600 bytes are expected

  Complete message from ffmpeg :

  ffmpeg version N-55159-gf118b41 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Aug 18 2013 09:09:13 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
    configuration: --enable-libass --prefix=/opt/ffmpeg --enable-debug --enable-libfreetype
  
    libavutil      52. 40.100 / 52. 40.100
  
    libavcodec     55. 19.100 / 55. 19.100
  
    libavformat    55. 12.102 / 55. 12.102
  
    libavdevice    55.  3.100 / 55.  3.100
  
    libavfilter     3. 82.100 /  3. 82.100
  
    libswscale      2.  4.100 /  2.  4.100
  
    libswresample   0. 17.103 /  0. 17.103
  
  [video4linux2,v4l2 @ 0x9e43fa0] The V4L2 driver changed the video from 160x120 to 320x240
  
  [video4linux2,v4l2 @ 0x9e43fa0] The driver changed the time per frame from 1/20 to 1/15
  
  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 6424.338678, bitrate: 18432 kb/s
  
      Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 320x240, 18432 kb/s, 15 fps, 15 tbr, 1000k tbn, 1000k tbc
  
  Codec AVOption ab (set bitrate (in bits/s)) specified for output file #0 (/tmp/web.avi) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
  
  Output #0, avi, to '/tmp/web.avi':
  
    Metadata:
  
      ISFT            : Lavf55.12.102
  
      Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x240, q=2-31, 200 kb/s, 20 tbn, 20 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo -> mpeg4)
  
  Press [q] to stop, [?] for help
  
  [video4linux2,v4l2 @ 0x9e43fa0] The v4l2 frame is 46448 bytes, but 153600 bytes are expected
  
  /dev/video0: Invalid data found when processing input
  
  frame=   29 fps= 14 q=3.5 Lsize=      87kB time=00:00:01.45 bitrate= 490.0kbits/s    
  
  video:80kB audio:0kB subtitle:0 global headers:0kB muxing overhead 7.760075%
  
  [video4linux2,v4l2 @ 0x9e43fa0] Some buffers are still owned by the caller on close.