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• ffmpeg : Video duration confused for some players on Android

  2 juin 2021, par Radi Cho

  I am using ffmpeg to scale down and compress videos to be used in Android app.
The original files are played with no problem and have no metadata issues. When I re-encode them however, the Android player is able to play them, but displays wrong durations. My app is in production and it is using official player implementations, so I wonder if there is a way to fix the corruption using ffmpeg or adding some metadata to the generated files. Hopefully that's possible, but if not - any other possible fixes will be highly appreciated :)

  


  My ffmpeg command is complex, including scaling and encoding but I can confirm this issue is reproducible on my end with the simplest ffmpeg -i video.mp4 -c:v libx264 videogen.mp4 command.

  


  I'm leaving links to the two files if that's helpful for reference.

  


  

  • video.mp4

  


  • videogen.mp4

  


  


  Any ideas what could be causing this and how to fix it ?

  


  Player issues showcase :

  
video.mp4 (original)


  

  
videogen.mp4 (re-encoded)


  

  


• FFMPEG : Audio Distorted after some time intervals on android & IOS device players

  26 juin 2020, par Dinesh Kumar

  I am using FFmpeg version 3.4.2-bornlibra23, I have built a streaming server which has video/audio files and sends back .ts file whenever requested.

  


  Below is the command I am using to generate small media chunks and when I play them on chrome player video/audio streams are smooth. But on android/ios players have audio distortion at the end of each chunk.
In android, I am using EXO player and for IOS it is a native player.

  


  ffmpeg -y -ss  -i <input /> -to  -acodec aac -vcodec libx264 -crf 24 -profile:v baseline -level 3.0 -movflags &#x2B;faststart -preset veryfast -copyts output_start_end.ts&#xA;

  


  Can someone help ?
Adding output of the above command too.

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
  Duration: 00:00:33.52, start: 0.000000, bitrate: 737 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1500x900, 604 kb/s, 12 fps, 12 tbr, 12288 tbn, 24 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 129 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x4ac2b40] frame MB size (94x57) > level limit (1620)
[libx264 @ 0x4ac2b40] MB rate (64296) > level limit (40500)
[libx264 @ 0x4ac2b40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x4ac2b40] profile Constrained Baseline, level 3.0, 4:2:0, 8-bit
Output #0, mpegts, to 'output.ts':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
    Stream #0:0(und): Video: h264 (libx264), yuv420p, 1500x900, q=-1--1, 12 fps, 90k tbn, 12 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc57.107.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(und): Audio: aac (LC), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.107.100 aac
frame=   36 fps=0.0 q=-1.0 Lsize=     464kB time=00:00:12.01 bitrate= 316.6kbits/s speed=14.3x
video:376kB audio:47kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 9.705440%
[libx264 @ 0x4ac2b40] frame I:1     Avg QP:18.91  size: 64288
[libx264 @ 0x4ac2b40] frame P:35    Avg QP:17.45  size:  9176
[libx264 @ 0x4ac2b40] mb I  I16..4: 54.3%  0.0% 45.7%
[libx264 @ 0x4ac2b40] mb P  I16..4: 12.9%  0.0%  5.3%  P16..4:  3.4%  0.6%  0.1%  0.0%  0.0%    skip:77.7%
[libx264 @ 0x4ac2b40] coded y,uvDC,uvAC intra: 27.1% 45.5% 11.7% inter: 0.2% 4.0% 0.0%
[libx264 @ 0x4ac2b40] i16 v,h,dc,p: 20% 33% 10% 37%
[libx264 @ 0x4ac2b40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 25% 16%  5%  7%  5%  7%  4%  5%
[libx264 @ 0x4ac2b40] i8c dc,h,v,p: 43% 31% 20%  6%
[libx264 @ 0x4ac2b40] kb/s:1027.86
[aac @ 0x4ad1f20] Qavg: 188.068


  


• Interlaced (1080i) video converted to deinterlaced (1080p) won't play in Quicktime or other players, except VLC

  24 avril 2020, par cozmonaut

  I'm trying to convert a 1080i ts video clip to 1080p mp4. I've found many different ffmpeg commands to do this, which all successfully convert to 1080p mp4, however, none of generated clips will open in Quicktime or any another other player, other than VLC. I've read about the need to have the correct color space (i.e. yuv420p) for Quicktime to work, and also that 10 bit files won't work (only 8 bit). However, when these things have been accounted for, the resulting video clips still won't open in Quicktime.

  



  



  Here are the commands I've tried.

  



      ffmpeg -i test_original_interlaced.ts -vf bwdif -c:v libx264 -preset slow -crf 18 -pix_fmt yuv420p -c:a aac -b:a 320k test_generated_progressive.mp4

    ffmpeg -i test_original_interlaced.ts  -vf yadif -c:v libx264 -preset slow -crf 19 -c:a aac -b:a 256k test_generated_progressive.mp4

    ffmpeg -i test_original_interlaced.ts  -vf yadif -c:v libx264 -preset slow -crf 18 -pix_fmt yuv420p -c:a aac -b:a 256k test_generated_progressive.mp4

    ffmpeg -i test_original_interlaced.ts -vf yadif=parity=auto test_generated_progressive.mp4


  



  



  Here are the 1080i ts details and link to the original video clip :

  



  ffmpeg version 4.2.1-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mpegts, from '/Users/test_original_interlaced.ts':
  Duration: 00:00:05.26, start: 1.400000, bitrate: 15183 kb/s
  Program 1 
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
    Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 1920x1080 [SAR 1:1 DAR 16:9], Closed Captions, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x101](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, 5.1(side), fltp, 384 kb/s


  



  Link to original video clip (10 MB) : https://www.dropbox.com/s/85tv3v91lflfpon/test_original_interlaced.ts?dl=0

  



  



  Here are the 1080p mp4 details and link to the generated video clip (that won't open in Quicktime) :

  



  ffmpeg version 4.2.1-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Guessed Channel Layout for Input Stream #0.1 : 5.1
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/test_generated_progressive.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:00:05.27, start: 0.000000, bitrate: 9873 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], Closed Captions, 9543 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 319 kb/s (default)
    Metadata:
      handler_name    : SoundHandler


  



  Link to generated video clip (6.5 MB) : https://www.dropbox.com/s/w744mdee5drvmya/test_generated_progressive.mp4?dl=0

  



  



  Any help would be greatly appreciated.

  



  Thank you.