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• How create with ffmpeg a *.mov file which could be opened in default WMP ?

  22 mai 2016, par xiaose

  How create MOV, QuickTime Movie (.mov) which could be opened in default Windows Media Player ? Actually, smth. like this : http://cdn.online-convert.com/example-file/video/mov/example.mov

  I have files MPEG-1 or MPEG-2 and want to convert it with ffmpeg to the mov. Sure, I can write smth. like this :

  ffmpeg -i in.mpg -level 3.1 -vformat mpeg4 -qscale 1 -f mov out.mov

  ...and this will be Ok. But I need resulting file which will be correct MOV but, may be, without mpeg4 in it and played in WMP without installing any additional codecs

• ffmpeg splitting RGB and Alpha channels using filter

  29 juin 2012, par Dow

  I'm trying to use ffmpeg to split an input file into two separate files :

  1. An MP4 with only R,G and B channels
  2. An MP4 with the "extracted" A channel (a so-called Key clip, see http://ffmpeg-users.933282.n4.nabble.com/quot-Extracting-quot-Alpha-Channel-td3700227.html)

  I've managed to do both, but now I want to combine them into one single command. Here's what I do :

  ffmpeg -r $FPS -y -i input.flv -vcodec libx264 -vpre ipod640 -acodec libfaac -s 256x256 -r $FPS -filter_complex INSERT_FILTER_HERE rgb.mp4 alpha.mp4

  where INSERT_FILTER_HERE is :

  format=rgba, split [rgb_in][alpha_in];
  
  [rgb_in] fifo, lutrgb=a=minval [rgb_out];
  
  [alpha_in] format=rgba, split [T1], fifo, lutrgb=r=maxval:g=maxval:b=maxval, [T2] overlay [out];
  
  [T1] fifo, lutrgb=r=minval:g=minval:b=minval [T2]

  In short, I split the file into two streams, for the first stream, I "remove" the alpha channel, for the second stream, I extract a grayscale representation of the alpha channel. When I put this through graph2dot, it works fine, with a nullsink as output.

  However, when I run it in ffmpeg with -filter_complex, I get :

  ffmpeg version N-41994-g782763e Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Jun 28 2012 17:45:15 with gcc 4.6.3
  
    configuration: --enable-gpl --enable-nonfree --enable-pthreads --enable-filters --enable-libfaac --enable-libmp3lame --enable-libx264 --enable-libtheora --enable-libvpx --enable-postproc --enable-avfilter
  
    libavutil      51. 63.100 / 51. 63.100
  
    libavcodec     54. 29.101 / 54. 29.101
  
    libavformat    54. 11.100 / 54. 11.100
  
    libavdevice    54.  0.100 / 54.  0.100
  
    libavfilter     3.  0.100 /  3.  0.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, flv, from 'input.flv':
  
    Metadata:
  
      audiodelay      : 0
  
      canSeekToEnd    : true
  
    Duration: 00:01:10.56, start: 0.000000, bitrate: 1964 kb/s
  
      Stream #0:0: Video: vp6a, yuva420p, 800x950, 1536 kb/s, 25 tbr, 1k tbn, 1k tbc
  
      Stream #0:1: Audio: mp3, 44100 Hz, stereo, s16, 128 kb/s
  
  [graph 0 input from stream 0:0 @ 0x2e4c6e0] w:800 h:950 pixfmt:yuva420p tb:1/30 fr:30/1 sar:0/1 sws_param:flags=2
  
  Output pad "default" for the filter "Parsed_lutrgb_3" of type "lutrgb" not connected to any destination

  Any ideas on how I make ffmpeg recognize that it has to write [rgb_out] to rgb.mp4 and [out] to alpha.mp3 ?

  Thanks in advance !

• Ffmpeg and png watermark on OSX error

  28 juin 2012, par Stpn

  I am trying to add watermark with transparent background on OSX with ffmpeg.

  I am using this command :

  ffmpeg -i test.mpg -vf "movie=stuff.png, scale=100:100 [watermark]; [in][watermark] overlay=main_w-overlay_w:main_h-overlay_h-10 [out]"  out.mpg

  And I am getting this :

  ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Jun 12 2012 21:37:10 with clang 3.1 (tags/Apple/clang-318.0.54)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/0.11.1 --enable-shared --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-libfreetype --cc=/usr/bin/clang --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-libvo-aacenc --disable-ffplay
  
    libavutil      51. 54.100 / 51. 54.100
  
    libavcodec     54. 23.100 / 54. 23.100
  
    libavformat    54.  6.100 / 54.  6.100
  
    libavdevice    54.  0.100 / 54.  0.100
  
    libavfilter     2. 77.100 /  2. 77.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, mpeg, from 'test.mpg':
  
    Duration: 00:00:01.04, start: 1.000000, bitrate: 9106 kb/s
  
      Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p, 640x480 [SAR 1:1 DAR 4:3], 104857 kb/s, 24 fps, 24 tbr, 90k tbn, 24 tbc
  
      Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, stereo, s16, 128 kb/s
  
  File 'out.mpg' already exists. Overwrite ? [y/N] y
  
  w:640 h:480 pixfmt:yuv420p tb:1/90000 sar:1/1 sws_param:flags=2
  
  [buffersink @ 0x7ff50bc1c3e0] No opaque field provided
  
  [png @ 0x7ff50c038400] unsupported bit depth 16 and color type 4
  
  [image2 @ 0x7ff50c044800] decoding for stream 0 failed
  
  [image2 @ 0x7ff50c044800] Could not find codec parameters (Video: png, 640x480)
  
  [movie @ 0x7ff50bc17200] Failed to find stream info
  
  [movie @ 0x7ff50bc17200] seek_point:0 format_name:(null) file_name:stuff.png stream_index:0
  
  [scale @ 0x7ff50bc178c0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed_movie_0' and the filter 'Parsed_scale_1'
  
  Impossible to convert between the formats supported by the filter 'Parsed_movie_0' and the filter 'auto-inserted scaler 0'
  
  Error opening filters!

  I thought I am missing png support and I checked homebrew for libpng install, but it turn out png support is already included by Apple with OSX.

  Also I did

  ffmpeg -codecs list | grep -i png

  and I do have PNG support in ffmpeg :

  DEV D  png             PNG (Portable Network Graphics) image