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• h264 : Split h264-test off into a separate file - golomb-test.c.

  30 janvier 2012, par Diego Biurrun

  h264 : Split h264-test off into a separate file - golomb-test.c.

• Wrong duration of the result video when using ffmpeg filter complex concat [closed]

  9 décembre 2023, par Igor Chubin

  I am trying to do a trivial task of concatenating
several segments of the original video/audio
into a new file (and dropping the rest) :

  


      ffmpeg -i bdt.mkv -filter_complex '
    [0:v]trim=start=10.0:end=15.0,setpts=PTS-STARTPTS[0v];
    [0:a]atrim=start=10.0:end=15.0,asetpts=PTS-STARTPTS[0a];
    [0:v]trim=start=65.0:end=70.0,setpts=PTS-STARTPTS[1v];
    [0:a]atrim=start=65.0:end=70.0,asetpts=PTS-STARTPTS[1a];[0v][0a][1v]
    [1a]concat=n=2:v=1:a=1[outv][outa]' -map [outv] -map [outa] out.mp4


  


  When I am trying to watch out.mp4 after that, it has the original duration of bdt.mkv (70 minutes) and not 10 seconds, as I would expect.

  


  What am I doing wrong ?

  


  Update 1.

  


  (exactly as Scott Codez suggested)

  


  The problem is related to the formats. If the output format is mkv too, the problem disappears. But when I use mp4, that I need, the problem persists.

  


• Blank video as the result of converting from bmp ffmpeg [duplicate]

  1er juin 2021, par Артур Клочко

  ---

  


  Update

  


  I'm sorry, as I wrote I tried to play video via different variants and got nothing, but now I send it to myself via Telegram app, and it displays there correctly. It plays via Chrome also. Seems it is not the ffmpeg problem.

  


  I uploaded it to my site, if you are not aware, please check it via stupid uwp app or Windows Media player if you are using Windows, and if you have the same problem, please feedback and I will report it as a bug

  


  https://okumaima.com/cave.mp4

  


  ---

  


  Recently I have been using ffmpeg to convert jpg file set to mp4, and it was successfully. I used the next .bat file to do it :

  


  ffmpeg -framerate 60 -i out\%%d.jpg render.mp4


  


  Now, I am trying to do the same, but with bmp files, generated as screenshots using WinApi. Images as themselves are absolutely correct - I can open them via photos app, or anything else. Images resolution is constant and equals 2002x773.

  


  So now I am using the same .bat to make video :

  


  ffmpeg -framerate 60 -i out\%%d.bmp render.mp4


  


  It generates a tiny-size video (17 kb, for 10 bmp images, 5 mb each), that is opening by UWP video app or Windows Media program, but nothing is happening - no errors, yet no video length. If there are more images, the result video size also increases, but the video still doesn't play.

  


  Full output from ffmpeg :

  


  ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.2.1 (GCC) 20200122
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  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, image2, from 'rnd\%d.bmp':
  Duration: 00:00:00.17, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: bmp, bgra, 2002x773, 60 tbr, 60 tbn, 60 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (bmp (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 052fed40] using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2
[libx264 @ 052fed40] profile High 4:4:4 Predictive, level 4.2, 4:4:4, 8-bit
[libx264 @ 052fed40] 264 - core 159 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'caev.mp4':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 2002x773, q=-1--1, 60 fps, 15360 tbn, 60 tbc
    Metadata:
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame=   10 fps=0.0 q=-1.0 Lsize=      16kB time=00:00:00.11 bitrate=1142.4kbits/s speed=0.151x
video:15kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 6.097639%
[libx264 @ 052fed40] frame I:1     Avg QP:18.80  size:  6840
[libx264 @ 052fed40] frame P:4     Avg QP:25.73  size:  1517
[libx264 @ 052fed40] frame B:5     Avg QP:35.54  size:   426
[libx264 @ 052fed40] consecutive B-frames: 20.0% 40.0%  0.0% 40.0%
[libx264 @ 052fed40] mb I  I16..4: 21.1% 76.3%  2.6%
[libx264 @ 052fed40] mb P  I16..4:  0.6%  0.3%  0.3%  P16..4:  0.9%  0.6%  0.1%  0.0%  0.0%    skip:97.0%
[libx264 @ 052fed40] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  4.0%  0.2%  0.0%  direct: 0.0%  skip:95.6%  L0:34.5% L1:64.6% BI: 0.9%
[libx264 @ 052fed40] 8x8 transform intra:73.8% inter:10.2%
[libx264 @ 052fed40] coded y,u,v intra: 1.8% 1.5% 1.5% inter: 0.1% 0.1% 0.1%
[libx264 @ 052fed40] i16 v,h,dc,p: 52% 47%  1%  0%
[libx264 @ 052fed40] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 47% 45%  8%  0%  0%  0%  0%  0%  0%
[libx264 @ 052fed40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 31% 32%  3%  0%  1%  2%  5%  2%
[libx264 @ 052fed40] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 052fed40] ref P L0: 75.8%  4.1% 15.8%  4.3%
[libx264 @ 052fed40] ref B L0: 63.5% 34.8%  1.7%
[libx264 @ 052fed40] ref B L1: 97.6%  2.4%
[libx264 @ 052fed40] kb/s:721.78