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• ffmpeg incorrect duration when converting video to HLS

  12 octobre 2016, par Julie Bsd

  I’m facing an issue using ffmpeg to convert video, precisely mp4 video => Http Live Streaming (HLS)

  Once converted to HLS, the .m3u8 file has a wrong duration (e.g : 20,1s instead of 20.00s), causing bugs when playing it with AVPlayer on iOS.
  Playing the video with Safari cause the same issue.

  Example :
  1) Open Safari
  2) Play this video that i’ve converted
  3) Look at the download progression, stopped at 98% cause of wrong duration.
  
  4) When you slide between 98% and 100%, the video player can crash.

  ---

  EDIT 1 :

  I’ve edited the command line

   ffmpeg -i  video.mp4 \
  
   -codec copy \
  
   -acodec copy \
  
   -map 0 -f ssegment -g 60 -sc_threshold 0 \
  
   -segment_list playlist.m3u8 \
  
   -segment_list_flags +live \
  
   -segment_time 2 media%05d.ts \
  
    >./log_ffmpeg 2>./log_ffmpeg

  LOG :

  ffmpeg version 3.1.4-static http://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.4.1 (Debian 5.4.1-2) 20160904
  
    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-libzimg --cc=gcc-5 --disable-ffplay
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 48.101 / 57. 48.101
  
    libavformat    57. 41.100 / 57. 41.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './Comptes/1/Photos/306/original_video.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 1
  
      compatible_brands: mp41mp42isom
  
      creation_time   : 2016-10-12 14:29:51
  
    Duration: 00:00:20.00, start: 0.000000, bitrate: 1673 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 540x960, 1563 kb/s, 30 fps, 30 tbr, 600 tbn, 1200 tbc (default)
  
      Metadata:
  
        creation_time   : 2016-10-12 14:29:51
  
        handler_name    : Core Media Video
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 101 kb/s (default)
  
      Metadata:
  
        creation_time   : 2016-10-12 14:29:51
  
        handler_name    : Core Media Audio
  
  [stream_segment,ssegment @ 0x652ed80] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
      Last message repeated 1 times
  
  
  
  Output #0, stream_segment,ssegment, to './Comptes/1/Photos/306/media%05d.ts':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 1
  
      compatible_brands: mp41mp42isom
  
      encoder         : Lavf57.41.100
  
      Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709), 540x960, q=2-31, 1563 kb/s, 30 fps, 30 tbr, 90k tbn, 600 tbc (default)
  
      Metadata:
  
        creation_time   : 2016-10-12 14:29:51
  
        handler_name    : Core Media Video
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, 101 kb/s (default)
  
      Metadata:
  
        creation_time   : 2016-10-12 14:29:51
  
        handler_name    : Core Media Audio
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=  601 fps=0.0 q=-1.0 Lsize=N/A time=00:00:20.10 bitrate=N/A speed= 917x    
  
  video:3823kB audio:249kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

  m3u8 file :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-ALLOW-CACHE:YES
  
  #EXT-X-TARGETDURATION:3
  
  #EXTINF:2.033333,
  
  media00000.ts
  
  #EXTINF:2.000000,
  
  media00001.ts
  
  #EXTINF:2.000000,
  
  media00002.ts
  
  #EXTINF:2.000000,
  
  media00003.ts
  
  #EXTINF:2.000000,
  
  media00004.ts
  
  #EXTINF:2.000000,
  
  media00005.ts
  
  #EXTINF:2.000000,
  
  media00006.ts
  
  #EXTINF:2.000000,
  
  media00007.ts
  
  #EXTINF:2.000000,
  
  media00008.ts
  
  #EXTINF:2.000000,
  
  media00009.ts
  
  #EXTINF:0.033333,
  
  media00010.ts
  
  #EXT-X-ENDLIST

  As you can see input duration =/= output duration
  input duration : 20s
  output duration 20.1s

• Custom video buffering from remote https url

  6 octobre 2022, par b.stevens.photo

  In the abstract, how does video buffering work ? Say I have a video file on a remote server that I want to download to a device and play, is there any way I could implement a custom buffering algorithm with just an https url ?

  


  I've been googling it and can't find anything technical on video buffering, I would assume most video players have a buffering algorithm built in but I'm not using a video player on this particular project.

  


  Any help or guidance is appreciated.

  


• 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