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• FFMPEG - Converting all images that are uploaded to MP4s

  10 juin 2016, par programmer12

  I have created some FFMPEG codes to execute once an video has been loaded. I am still fairly new at this, so please give as much information as possible.

  // ffmpeg Location
  
  $ffmpeg = 'c:\ffmpeg\bin\ffmpeg.exe';
  
  $ffprobe = 'c:\ffmpeg\bin\ffprobe.exe';
  
  
  
  // Video Filename Dir
  
  $video0 = $caption->row()->vidFile;
  
  // ex. output: upload/user/vid23.mov 
  
  
  
  // Video Filename only
  
  $video1 = explode('/',$video0);
  
  $video2 = $video1[2];
  
  // ex. output = vid23.mov;
  
  
  
  // Remove Extensions
  
  function extensions ($video2) 
  
  { 
  
       $filename = strtolower($video2); 
  
       $exts = explode(".", $video2); 
  
       $n = count($exts)-2; 
  
       $exts = $exts[$n]; 
  
       return $exts; 
  
   } 
  
  
  
       $ext2 = extensions($video2);
  
  // ex. output = vid23;
  
  
  
       //Convert all files to Mp4s
  
       //exec("$ffmpeg -i $video0 -vcodec copy -acodec copy $ext2.mp4");
  
       exec("$ffmpeg -i $video0 -vcodec libx264 -vf scale=-1:360 -qscale 7 -acodec libfdk_aac -ab 32 -ar 24000 $ext2.mp4");

  Am I doing something incorrect ? It works when I test it on my test location, but once I moved it into production useing Codeigniter Framework. It’s not working (Well, correction, just this part is not working - My image thumbnail does what is needed)

  Please help in anyway possible. Thanks !

  EDIT

  The main issue with the code is it will totally skip over the section and not execute at all. I didn’t receive any error messages. Another issue is the file tends to codec error because of the moov data (bytes 0-32/33). I did do some reading, but since I’m not familiar with FFMPEG it is hard to read or understand.

  Example site : http://askubuntu.com/questions/396883/how-to-simply-convert-video-files-i-e-mkv-to-mp4

  I used that site as a base.

  ERROR LOG INFO

  Updated the FFMPEG exec script to the following

  exec("$ffmpeg -i $video0 -vcodec libx264 -vf scale=-2:360 
  
  -acodec libfdk_aac -ab 32k -pix_fmt yuv420p -movflags +faststart 
  
  -ar 24000 $ext2.mp4 2> log/error_log.txt");

  The Error log printed out the following

  ffmpeg version N-80101-gd970f7b Copyright (c) 2000-2016 the FFmpeg developers
  
  built with gcc 5.3.0 (GCC)
  
   configuration: --enable-gpl --enable-version3 --disable-w32threads 
  
   --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig 
  
   --enable-frei0r --enable-gnutls --enable-iconv --enable-libass 
  
   --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype 
  
   --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug 
  
   --enable-libmfx --enable-libmp3lame --enable-libopencore-amrnb 
  
   --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus 
  
   --enable-librtmp --enable-libschroedinger --enable-libsnappy 
  
   --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame 
  
   --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis 
  
   --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 
  
   --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg 
  
   --enable-lzma --enable-decklink --enable-zlib
  
  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
  
  upload/user/vid53.mp4: No such file or directory

• FFmpeg Hardware Acceleration with NVENC produces Half Green output video

  17 juin 2016, par Dan Sandland

  Using the FFmpeg build found here : https://github.com/illuspas/ffmpeg-hw-win32

  gcc 5.3.0
  
  --enable-nvenc nvidia_video_sdk_6.0.1
  
  --enable-libmfx Intel(R)_Media_SDK_2016.0.1
  
  --enable-libfdk-aac 0.1.4
  
  --enable-libspeex 1.2rc1
  
  --enable-libx264 1:148.20150725
  
  --enable-libopenh264 1.5.0
  
  --enable-libx265 1.8
  
  --enable-libopus 1.1.2
  
  --enable-libmp3lame 3.99.5
  
  --enable-libkvazaar 0.8.2

  ./configure —prefix=/home/aliang/FFmpeg/x86_64 —enable-small —disable-debug —disable-doc —arch=x86_64 —cc=’ccache x86_64-w64-mingw32-gcc’ —cross-prefix=x86_64-w64-mingw32- —enable-cross-compile —target-os=mingw32 —enable-libfdk-aac —enable-libmp3lame —enable-libopus —enable-libspeex —enable-libx264 —enable-libx265 —enable-libmfx —enable-nvenc —enable-libopenh264 —enable-libkvazaar —enable-gpl —enable-nonfree

  I’m running Windows on a MacBook Pro. I also tried with a more recent build and had the same output.

  Input video is from sample-videos.com.

  The ffmpeg command I am running is :

  ffmpeg -y -i sample.mp4 -vcodec nvenc_h264 -pixel_format yuv420p -f mp4 sample-out-nvenc.mp4

  sample-out-nvenc.mp4 looks like this via ffplay or vlc :

  

  When I grab a frame using jpeg2, the colors appear normal, but the height is squished.

  ffmpeg -y -ss 15.5 -i sample.mp4 -vframes 1 -s 480x300 -f image2 grab.jpg

  

  The ffprobe results for the output (sample-out-nvenc.mp4) :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample-out-nvenc.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.25.100
  
    Duration: 00:00:31.02, start: 0.021333, bitrate: 1994 kb/s
  
      Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p(tv), 640x480 [SAR 1:1 DAR 4:3], 1650 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 342 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler

  Lastly the output from the nvenc encoding command :

  ffmpeg -y -i sample.mp4 -vcodec nvenc_h264 -pixel_format yuv420p -f mp4 sample-out-nvenc.mp4
  
  ffmpeg version 3.0 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.3.0 (GCC)
  
    configuration: --prefix=/home/aliang/FFmpeg/x86_64 --enable-small --disable-debug --disable-doc --arch=x86_64 --cc='ccache x86_64-w64-mingw32-gcc' --cross-prefix=x86_64-w64-mingw32- --enable-cross-compile --target-os=mingw32 --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libspeex --enable-libx264 --enable-libx265 --enable-libmfx --enable-nvenc --enable-libopenh264 --enable-libkvazaar --enable-gpl --enable-nonfree
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      creation_time   : 1970-01-01 00:00:00
  
      encoder         : Lavf53.24.2
  
    Duration: 00:00:31.00, start: 0.000000, bitrate: 1353 kb/s
  
      Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 966 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : SoundHandler
  
  Output #0, mp4, to 'sample-out-nvenc.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.25.100
  
      Stream #0:0(und): Video: h264 (nvenc_h264) ([33][0][0][0] / 0x0021), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 2000 kb/s, 25 fps, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
        encoder         : Lavc57.24.102 nvenc_h264
  
      Side data:
  
        unknown side data type 10 (24 bytes)
  
      Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, 5.1, fltp, 341 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : SoundHandler
  
        encoder         : Lavc57.24.102 aac
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (nvenc_h264))
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  frame=  774 fps=253 q=-0.0 Lsize=    7551kB time=00:00:30.99 bitrate=1995.6kbits/s speed=10.1x
  
  video:6236kB audio:1297kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.243011%
  
  [aac @ 000001cdd9900520] Qavg: 743.457

• Cannot retrieve duration of webm file using ffmpeg

  10 juin 2016, par maximus 69

  I am trying to retrieve the duration of a .webm video file that I recorded using the the video.js plugin (https://github.com/collab-project/videojs-record).

  I am using ffmpeg to get the duration but it always return N/A :

  ffprobe version 3.0.2-static http://johnvansickle.com/ffmpeg/  Copyright (c) 2007-2016 the FFmpeg developers
  
    built with gcc 5.3.1 (Debian 5.3.1-16) 20160424
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libwebp --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libfreetype --enable-fontconfig --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg --enable-libopus --enable-libass --enable-gnutls --enable-libvidstab --enable-libsoxr --enable-frei0r --enable-libfribidi --disable-indev=sndio --disable-outdev=sndio --enable-librtmp --enable-libmfx --enable-libzimg --cc=gcc
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, matroska,webm, from '/home/demoss/public_html/source/bALRt9I697PVQh4zglou.webm':
  
    Metadata:
  
      encoder         : Chrome
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0(eng): Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 30 fps, 30 tbr, 1k tbn, 1k tbc (default)
  
      Stream #0:1(eng): Audio: opus, 48000 Hz, mono, fltp (default)
  
  duration=N/A

  I don’t think the video is corrupted as it played in my VideoJS player without issues.

  Any pointers as to why its not returning the duration would be greatly appreciated. I wouldn’t mind using an alternative library as well

  Thanks