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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>

• Invalid and inefficient vfw-avi packed B frames detected

  16 août 2015, par seyong

  I got message Invalid and inefficient vfw-avi packed B frames detected while video was converted.

  After converting the video, I checked pixel values in video. Values are different from original video. Why values change after converting ?

  and I use lossless intra-frame video codec ’ffv1’

  command :
  ffmpeg
  -i input_video -vcodec ffv1 -acodec pcm_s16le output_video

  ffmpeg version 1.1.1 Copyright (c) 2000-2013 the FFmpeg developers  
  
  built on Jan 20 2013 23:05:28 with gcc 4.7.2 (GCC)   configuration:
  
  --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib   libavutil      52. 13.100 / 52. 13.100   libavcodec     54. 86.100 / 54. 86.100   libavformat    54. 59.106 / 54. 59.106   libavdevice    54.  3.102 / 54.  3.102   libavfilter     3. 32.100 /  3. 32.100   libswscale      2.  1.103 / 
  
  2.  1.103   libswresample   0. 17.102 /  0. 17.102   libpostproc    52.  2.100 / 52.  2.100 [mpeg4 @ 02e218c0] Invalid and inefficient vfw-avi packed B frames detected Input #0, avi, from
  
  'D:\video_output\avi\1.avi':   Metadata:
  
      encoder         : Lavf54.59.106   Duration: 00:04:25.52, start: 0.000000, bitrate: 2744 kb/s
  
      Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (DX50 / 0x30355844), yuv420p, 720x544 [SAR 1:1 DAR 45:34], 25 tbr, 25 tbn, 25
  
  tbc
  
      Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp, 192 kb/s Output #0, matroska, to 'D:\video_output\avi\1_2.mkv': 
  
  Metadata:
  
      encoder         : Lavf54.59.106
  
      Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv420p, 720x544 [SAR 1:1 DAR 45:34], q=2-31, 200 kb/s, 1k tbn, 25 tbc
  
      Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Stream mapping:   Stream #0:0 -> #0:0 (mpeg4 -> ffv1)   Stream #0:1 ->
  
  #0:1 (ac3 -> pcm_s16le) Press [q] to stop, [?] for help [mpeg4 @ 02e27920] Invalid and inefficient vfw-avi packed B frames detected
  
  frame=   36 fps=0.0 q=0.0 size=    1916kB time=00:00:01.56
  
  bitrate=10008.5kbits/s
  
  ...
  
  frame= 6565 fps= 46 q=0.0 size=  862611kB time=00:04:22.72
  
  bitrate=26897.5kbits/s     frame= 6594 fps= 46 q=0.0 size=  864799kB
  
  time=00:04:23.87 bitrate=26848.0kbits/s     frame CRC mismatch frame=
  
  6629 fps= 46 q=0.0 size=  866407kB time=00:04:25.20
  
  bitrate=26763.2kbits/s     frame= 6638 fps= 46 q=0.0 Lsize=  866521kB
  
  time=00:04:25.56 bitrate=26730.5kbits/s    
  
  
  
  video:816725kB audio:49668kB subtitle:0 global headers:0kB muxing
  
  overhead 0.014713%

  c++ code

  void ProcessVideo::processFrame1(string fileName1, string fileName2) {
  
  this->capture.open(fileName1);
  
  if (!this->capture.isOpened())
  
      cout<<"video1 error";
  
  
  
  get_videoInfo();
  
  
  
  set_videoInfo();
  
  
  
  this->capture1.open(fileName2);
  
  if (!this->capture1.isOpened())
  
      cout<<"video2 error";
  
  
  
  cv::Mat frame; // current video frame
  
  cv::Mat frame1; // current video frame
  
  
  
  cv::namedWindow("image1");
  
  cv::namedWindow("image2");
  
  
  
  int count = 0;
  
  int count1 = 0;
  
  
  
  while (1) {
  
      capture >> frame;
  
      capture1 >> frame1;
  
  
  
      if (frame.empty()) {
  
          //break;
  
          cout<<"Frame1 Empty"<::iterator it=frame.begin();
  
      cv::Mat_::iterator itend=frame.end();
  
  
  
      if (frame1.empty()) {
  
          //break;
  
          cout<<"Frame2 Empty"<::iterator it1=frame1.begin();
  
      cv::Mat_::iterator itend1=frame1.end();
  
  
  
      if(frame.empty() && frame1.empty()) {
  
          break;
  
      }
  
  
  
      count1++;
  
  
  
      int i=0,j=0,k=0;
  
  
  
      while(it!=itend && it1!=itend1) {
  
          ++it;
  
          ++it1;
  
  
  
          count++;
  
  
  
          if((*it)[0] != (*it1)[0]){
  
              i++;
  
          }
  
          else if((*it)[1] != (*it1)[1]){
  
              j++;
  
          }
  
          else if((*it)[2] != (*it1)[2]){
  
              k++;
  
          }
  
      }
  
      cout<<"count diffrent pixel : "<capture.release();
  
  this->capture1.release();

  }

• OUTPUT webcam video over rtp

  20 août 2013, par Manjinder Singh Sekhon

  I'm currently trying to stream webcam video from beagleboard black to my laptop and am using this line of code :

  avconv -f video4linux2 -i /dev/video0 -debug -vcodec mpeg2video -r 25 -pix_fmt yuv420p -me_method epzs -b 2600k -bt 256k -f rtp rtp ://192.168.1.12:5004

  the program starts working, but after a while it doesn't really do anything.
  debug log :

  avconv version v0.8.4, Copyright (c) 2000-2012 the Libav developers
  
    built on May 20 2013 13:00:42 with gcc 4.7.3 20130205 (prerelease)
  
    configuration: --enable-shared --enable-pthreads --enable-gpl --enable-postproc --enable-avfilter --cross-prefix=arm-angstrom-linux-gnueabi- --prefix=/usr --enable-avserver --enable-avplay --enable-x11grab --enable-libtheora --enable-libvorbis --enable-libx264 --arch=arm --target-os=linux --enable-cross-compile --extra-cflags=' -fexpensive-optimizations -fomit-frame-pointer -O4 -ffast-math -march=armv7-a -mthumb-interwork -mfloat-abi=softfp -mfpu=neon -mtune=cortex-a8 --sysroot=/build/v2012.12/build/tmp-angstrom_v2012_12-eglibc/sysroots/beaglebone' --extra-ldflags='-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed' --sysroot=/build/v2012.12/build/tmp-angstrom_v2012_12-eglibc/sysroots/beaglebone --enable-hardcoded-tables --cpu=cortex-a8
  
    libavutil    51. 22. 1 / 51. 22. 1
  
    libavcodec   53. 35. 0 / 53. 35. 0
  
    libavformat  53. 21. 0 / 53. 21. 0
  
    libavdevice  53.  2. 0 / 53.  2. 0
  
    libavfilter   2. 15. 0 /  2. 15. 0
  
    libswscale    2.  1. 0 /  2.  1. 0
  
    libpostproc  52.  0. 0 / 52.  0. 0
  
  [video4linux2 @ 0x2dae0] [3]Capabilities: 84000001
  
  [video4linux2 @ 0x2dae0] Querying the device for the current frame size
  
  [video4linux2 @ 0x2dae0] Setting frame size to 640x480
  
  [video4linux2 @ 0x2dae0] The V4L2 driver changed the pixel format from 0x32315559 to 0x56595559
  
      Last message repeated 1 times
  
  [video4linux2 @ 0x2dae0] The V4L2 driver changed the pixel format from 0x50323234 to 0x56595559
  
  [video4linux2 @ 0x2dae0] The V4L2 driver set input_id: 0, input: Camera 1

  from what I can see, the program stops because it can't get any input from webcam. The webcam works when I use a opencv program.(so /dev/video0 definitly works.) Any ideas. I've also tried using ffmpeg, but i get message that I should use avconv.