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• FFmpeg Fade Out Audio Filter (afade) not being Applied to Track Clipped Iteratively

  4 juin 2016, par Juan Carlos Farah

  I am trying to split a track into multiple fixed-sized (30-second) clips, each with a (5-second) fade-in / fade-out at the beginning and end, respectively. I’m using node-fluent-ffmpeg to interface with ffmpeg and saving each of the ffmpeg commands in an array of ES6 Promises that I later execute using Promise.all().

  I am able to clip the tracks and add the fade-in filter successfully, but for some reason the fade-out filter is only applied to the first clip of the track. I have looked around for answers both in the ffmpeg and node-fluent-ffmpeg documentation (here and here), but there is no mention of issues arising from applying fade-out filters to a track that is being clipped multiple times.

  My code is very similar to the snippet below, with the audio filters being applied in sequence using the audioFilters method. Note that I have tried leaving only the fade-out filter, but the problem persists. Any pointers would be greatly appreciated.

  var promises = [];
  
  const duration = track.duration;
  
  const interval = 30;
  
  const fade = 5;             
  
  const bitrate = 128;        
  
  
  
  for (var i = 0; i <= Math.floor(duration) - interval; ++i) {
  
      const start = i;            // Start second.      
  
      const end = start + interval;
  
      const mp3 = `${new ObjectId().toHexString()}.mp3`;
  
  
  
      var command = new Promise((resolve, reject) => {
  
          ffmpeg(path).setStartTime(start)
  
                      .audioBitrate(bitrate)
  
                      .audioFilters([
  
                          {
  
                              filter: 'afade',
  
                              options: `t=in:ss=${start}:d=${fade}`
  
                          },
  
                          {
  
                              filter: 'afade',
  
                              options: `t=out:st=${end - fade}:d=${fade}`
  
                          }
  
                      ])
  
                      .duration(interval)
  
                      .on('error', (err) => {
  
                          reject("An error occurred while clipping.");
  
                      })
  
                      .on('end', () => {
  
                          resolve(`Finished processing ${output}.`);
  
                      })
  
                      .save(mp3);
  
      });
  
      promises.push(command);     
  
  }

  And here is my ffmpeg version information :

  ffmpeg version 2.8.6 Copyright (c) 2000-2016 the FFmpeg developers
  
  built with Apple LLVM version 7.0.2 (clang-700.1.81)
  
  configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.6 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
  
  libavutil      54. 31.100 / 54. 31.100
  
  libavcodec     56. 60.100 / 56. 60.100
  
  libavformat    56. 40.101 / 56. 40.101
  
  libavdevice    56.  4.100 / 56.  4.100
  
  libavfilter     5. 40.101 /  5. 40.101
  
  libavresample   2.  1.  0 /  2.  1.  0
  
  libswscale      3.  1.101 /  3.  1.101
  
  libswresample   1.  2.101 /  1.  2.101
  
  libpostproc    53.  3.100 / 53.  3.100

• PHP memory issue when executing FFMPEG in CGI module but works from shell in CentOs

  28 mai 2016, par sam rolfe

  I am trying to execute FFMPEG on my VPS server however it is failing due to memory problems. The PHP calls an shell_exec($cmd) on FFMPEG and this throws the memory allocation error. However if I call the exact same FFMPEG command from shell it works.

  Even STRANGER is if I call the php script with the shell_exec($cmd) from shell - then it works.

  I am sorry if I have not phrased this correctly. But I really feel as though this is a memory issue from the PHP being executed in the browser window via the CGI exe - as when it is run from within the shell it is obviously able to maintain the memory level. I am desperate to get this to work and have been researching all week.

  I looked at system("ulimit -a") ;

  core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 1546994 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 16384 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 400 virtual memory (kbytes, -v) 1048576 file locks (-x) unlimited file locks (-x) unlimited

  The PHP is running as a suphp CGI I have set the php.ini memory to 2G, here are the details of things.

  The basic command insude PHP

  $cmd="ffmpeg -hwaccel auto  -i finn.mp4 -y  -pix_fmt yuv410p -s 320x240  -codec:v h264 -c:a copy  -crf 20 -preset slow  0001_finn_test_2.mp4   null >/dev/null 2> ffmpeg_2.log &";

  Output from error log - I can not post the full log as the formatting will not work :

  ffmpeg version N-80079-g4c82cca-vps15452_20160524 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16)
  
    configuration: --prefix=/usr --extra-version=vps15452_20160524 --enable-shared --enable-static --enable-libx264 --enable-libass --enable-fontconfig --enable-libfreetype --enable-gpl --enable-nonfree --enable-version3 --enable-libmp3lame --enable-libvpx --enable-libspeex --enable-libwebp --enable-libfaac --enable-libtheora --enable-libvorbis
  
    libavutil      55. 24.100 / 55. 24.100
  
    libavcodec     57. 43.100 / 57. 43.100
  
    libavformat    57. 37.100 / 57. 37.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 46.100 /  6. 46.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'finn.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2016-01-28 09:16:38
  
    Duration: 00:00:29.93, start: 0.000000, bitrate: 17060 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 16991 kb/s, 30.01 fps, 30 tbr, 90k tbn (default)
  
      Metadata:
  
        creation_time   : 2016-01-28 09:16:38
  
        handler_name    : VideoHandle
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 256 kb/s (default)
  
      Metadata:
  
        creation_time   : 2016-01-28 09:16:38
  
        handler_name    : SoundHandle
  
  Incompatible pixel format 'yuv410p' for codec 'libx264', auto-selecting format 'yuv420p'
  
  [libx264 @ 0x2560c60] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  
  [libx264 @ 0x2560c60] profile High, level 1.3
  
  [libx264 @ 0x2560c60] 264 - core 148 r2694 3b70645 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=1 ref=5 deblock=1:0:0 analyse=0x3:0x113 me=umh subme=8 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=7 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=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=crf mbtree=1 crf=20.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [mp4 @ 0x255ed00] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
      Last message repeated 1 times
  
  Output #0, mp4, to '0001_finn_test_2.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      encoder         : Lavf57.37.100
  
      Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 320x240, q=2-31, 30 fps, 15360 tbn (default)
  
      Metadata:
  
        creation_time   : 2016-01-28 09:16:38
  
        handler_name    : VideoHandle
  
        encoder         : Lavc57.43.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1(eng): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, 256 kb/s (default)
  
      Metadata:
  
        creation_time   : 2016-01-28 09:16:38
  
        handler_name    : SoundHandle
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [h264 @ 0x29478c0] decode_slice_header error
  
  [h264 @ 0x29478c0] no frame!
  
  [h264 @ 0x298eb60] Cannot allocate memory.
  
  [h264 @ 0x298eb60] Could not allocate memory
  
  [h264 @ 0x298eb60] h264_slice_header_init() failedError while decoding stream #0:0: Cannot allocate memory
  
  [h264 @ 0x298eb60] Cannot allocate memory.
  
  [h264 @ 0x298eb60] Could not allocate memory
  
  [h264 @ 0x298eb60] h264_slice_header_init() failedError while decoding stream 
  
  [h264 @ 0x298eb60] h264_slice_header_init() failedError while decoding stream #0:0: Cannot allocate memory
  
  Error writing trailer of 0001_finn_test_2.mp4: Cannot allocate memoryframe=    0 fps=0.0 q=0.0 Lsize=       1kB time=00:00:09.07 bitrate=   0.8kbits/s speed= 103x    
  
  video:0kB audio:284kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Conversion failed!

• Conversion of .iva to .mp4 using ffmpeg

  9 juin 2016, par Rupesh Parab

  The video which I am trying to convert is uploaded at http://www.filedropper.com/video_17

  I am using the following command to convert the file :

  ffmpeg -i archive.iva -c copy -map 0 output.mp4 -vsync 2 -y;

  The file should be around 1 min in length but after conversion is of only 7 secs

  What am I doing wrong ?

  ---

  Edit

  Console Output :

  rupesh@rupesh-Lenovo-IdeaPad-Y510P:~/video$ ffmpeg -i archive.iva -c copy -map 0 output.mp4 -vsync 2 -y; 
  
  ffmpeg version N-80026-g936751b Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab
  
    libavutil      55. 24.100 / 55. 24.100
  
    libavcodec     57. 42.100 / 57. 42.100
  
    libavformat    57. 36.100 / 57. 36.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 45.100 /  6. 45.100
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  [mjpeg @ 0x3a2eda0] Format mjpeg detected only with low score of 25, misdetection possible!
  
  Input #0, mjpeg, from 'archive.iva':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown), 640x480, 25 fps, 25 tbr, 1200k tbn
  
  [mp4 @ 0x3a309c0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf57.36.100
  
      Stream #0:0: Video: mjpeg (l[0][0][0] / 0x006C), yuvj422p(pc, bt470bg/unknown/unknown), 640x480, q=2-31, 25 fps, 25 tbr, 1200k tbn
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=  190 fps=0.0 q=-1.0 Lsize=    5909kB time=00:00:07.56 bitrate=6403.2kbits/s speed= 127x    
  
  video:5908kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.026134%