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• ffmpeg output file is too large

  6 juin 2017, par David Page

  I want to burn a subtitle file(.srt) to a mp4 video.My command is :

  ffmpeg -i input.mp4 -c:v mpeg4 -q:v 1 -vf subtitles=input.srt out.mp4

  It output a video with a good quality,but its size is 1.12GB while the input file is 213MB.

  I think the problem is kbps of output file is too high.the bitrate of input file is 568 kb/s but the output file is 3154 kb/s.

  So I want to set the kps,now here is my code :

  ffmpeg -i input.mp4 -b:v 569k -minrate 568k -maxrate 570k -c:v mpeg4 -q:v 1 -vf subtitles=input.srt out.mp4

  Although the output file become smaller(538MB),the video’s quality is awful(Compare with input file)...
  So how to make the output file smaller and in good quality ?Thanks.

• fixed - ffmpeg output file is too large

  14 mai 2017, par David Page

  I want to burn a subtitle file(.srt) to a mp4 video.My command is :

  ffmpeg -i input.mp4 -c:v mpeg4 -q:v 1 -vf subtitles=input.srt out.mp4

  It output a video with a good quality,but its size is 1.12GB while the input file is 213MB.

  I think the problem is kbps of output file is too high.the bitrate of input file is 568 kb/s but the output file is 3154 kb/s.

  So I want to set the kps,now here is my code :

  ffmpeg -i input.mp4 -b:v 569k -minrate 568k -maxrate 570k -c:v mpeg4 -q:v 1 -vf subtitles=input.srt out.mp4

  Although the output file become smaller(538MB),the video’s quality is awful(Compare with input file)...
  So how to make the output file smaller and in good quality ?Thanks.

• ffmpeg : error on large input file [duplicate]

  1er octobre 2016, par ingenious

  This question already has an answer here :

  • ffmpeg convert from H.264 (High 4:4:4 Profile) to H.264 (Main Profile)
    
    1 answer
    

  I have a large Mov file with this info :

  

  I want convert it to mp4 by this ffmpeg command :

  ffmpeg -i 57d5092f59418.mov -codec:v libx264 -profile:v high -preset slow 
  
  -b:v 360k -maxrate 424k -bufsize 720k -vf scale=-1:360 -threads 0 -b:a 64k
  
  out.mov

  But I get this error :

  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  detail :

          ffmpeg version N-81784-g92de2c2 Copyright (c) 2000-2016 the FFmpeg developers
  
        built with gcc 5.4.0 (GCC)
  
        configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dx
  
      va2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-lib
  
      ebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --ena
  
      ble-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfree
  
      type --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enab
  
      le-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-lib
  
      openh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschr
  
      oedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheor
  
      a --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvo
  
      rbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --ena
  
      ble-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --e
  
      nable-decklink --enable-zlib
  
        libavutil      55. 30.100 / 55. 30.100
  
        libavcodec     57. 58.100 / 57. 58.100
  
        libavformat    57. 51.100 / 57. 51.100
  
        libavdevice    57.  0.102 / 57.  0.102
  
        libavfilter     6. 63.100 /  6. 63.100
  
        libswscale      4.  1.100 /  4.  1.100
  
        libswresample   2.  2.100 /  2.  2.100
  
        libpostproc    54.  0.100 / 54.  0.100
  
      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '57d5092f59418.mov':
  
        Metadata:
  
          major_brand     : qt
  
          minor_version   : 537199360
  
          compatible_brands: qt
  
          creation_time   : 2016-02-09T07:33:27.000000Z
  
        Duration: 00:00:13.71, start: 0.000000, bitrate: 72247 kb/s
  
          Stream #0:0(eng): Video: qtrle (rle  / 0x20656C72), bgra, 1920x1080, 72242 k
  
      b/s, SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc (default)
  
          Metadata:
  
            creation_time   : 2016-02-09T07:33:27.000000Z
  
            handler_name    : Apple Alias Data Handler
  
            encoder         : Animation
  
            timecode        : 00:00:08;17
  
          Stream #0:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
  
          Metadata:
  
            creation_time   : 2016-02-09T07:33:46.000000Z
  
            handler_name    : Apple Alias Data Handler
  
            timecode        : 00:00:08;17
  
      File 'out.mov' already exists. Overwrite ? [y/N] y
  
      No pixel format specified, yuv444p for H.264 encoding chosen.
  
      Use -pix_fmt yuv420p for compatibility with outdated media players.
  
      x264 [error]: high profile doesn't support 4:4:4
  
      [libx264 @ 00000000006f2f20] Error setting profile high.
  
      [libx264 @ 00000000006f2f20] Possible profiles: baseline main high high10 high42
  
      2 high444
  
      Output #0, mov, to 'out.mov':
  
        Metadata:
  
          major_brand     : qt
  
          minor_version   : 537199360
  
          compatible_brands: qt
  
          Stream #0:0(eng): Video: h264, none, q=2-31, SAR 1:1 DAR 0:0, 29.97 fps (def
  
      ault)
  
          Metadata:
  
            creation_time   : 2016-02-09T07:33:27.000000Z
  
            handler_name    : Apple Alias Data Handler
  
            timecode        : 00:00:08;17
  
            encoder         : Lavc57.58.100 libx264
  
      Stream mapping:
  
        Stream #0:0 -> #0:0 (qtrle (native) -> h264 (libx264))
  
      Error while opening encoder for output stream #0:0 - maybe incorrect parameters
  
      such as bit_rate, rate, width or height

  What shoud I do ?

  thanks