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• I tried to make an avi file from images using ffmpeg but the avi file is very small why ?

  13 mai 2013, par Yaron Cohen Minz

  I tried this :

  In C# i'm creating 100 bitmap files :

  for (int i = 0; i < 100; i++)
  
              {
  
  
  
                  t.Save(@"D:\ffmpegtorun\ffmpeg-20130509-git-13cb6ed-win32-static\bin\Screenshots\" + "Screenshot" + i.ToString("D6") + ".Bmp",ImageFormat.Bmp);
  
              }

  Then i'm using the ffmpeg.exe command line to create an avi file movie of all the bitmaps.

  D :\ffmpegtorun\ffmpeg-20130509-git-13cb6ed-win32-static\bin\Screenshots>ffmpeg -
  f image2 -r 5 -i Screenshot000099.bmp -c:v libx264 -r 30 out.mp4

  And before it i tried :

  D :\ffmpegtorun\ffmpeg-20130509-git-13cb6ed-win32-static\bin\Screenshots>ffmpeg -
  f image2 -r 1/5 -i Screenshot000099.bmp -c:v libx264 -r 30 out.mp4

  When i tried to use jpg files i got an error say jpeg is not supported.
  Then when the files were 1920X1080 i got an error say this resolution is not supported.

  Now i did it again and hot this :

  D:\ffmpegtorun\ffmpeg-20130509-git-13cb6ed-win32-static\bin\Screenshots>ffmpeg -
  
  f image2 -r 1/5 -i Screenshot000099.bmp -c:v libx264 -r 30 out.mp4
  
  ffmpeg version N-52941-g13cb6ed Copyright (c) 2000-2013 the FFmpeg developers
  
    built on May  9 2013 17:18:28 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmp3lame --enable-libopencore-amrn
  
  b --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libr
  
  tmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheo
  
  ra --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li
  
  bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --ena
  
  ble-zlib
  
    libavutil      52. 30.100 / 52. 30.100
  
    libavcodec     55.  7.100 / 55.  7.100
  
    libavformat    55.  4.101 / 55.  4.101
  
    libavdevice    55.  0.100 / 55.  0.100
  
    libavfilter     3. 63.101 /  3. 63.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  [image2 @ 02532b00] Stream #0: not enough frames to estimate rate; consider incr
  
  easing probesize
  
  Input #0, image2, from 'Screenshot000099.bmp':
  
    Duration: 00:00:05.00, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: bmp, bgra, 1920x1080, 0.20 tbr, 0.20 tbn, 0.20 tbc
  
  File 'out.mp4' 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.
  
  [libx264 @ 0253e180] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  
  [libx264 @ 0253e180] profile High 4:4:4 Predictive, level 4.0, 4:4:4 8-bit
  
  [libx264 @ 0253e180] 264 - core 132 r2309 3b1f1f7 - H.264/MPEG-4 AVC codec - Cop
  
  yleft 2003-2013 - http://www.videolan.org/x264.html - options:  cabac=1 ref=3 de
  
  block=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 chr
  
  oma_qp_offset=4 threads=12 lookahead_threads=2 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 scene
  
  cut=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 'out.mp4':
  
    Metadata:
  
      encoder         : Lavf55.4.101
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 1920x1
  
  080, q=-1--1, 15360 tbn, 30 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (bmp -> libx264)
  
  Press [q] to stop, [?] for help
  
  frame=    1 fps=0.0 q=29.0 Lsize=      74kB time=00:00:00.03 bitrate=18159.5kbit
  
  s/s
  
  video:73kB audio:0kB subtitle:0 global headers:0kB muxing overhead 1.014632%
  
  [libx264 @ 0253e180] frame I:1     Avg QP:29.34  size: 74174
  
  [libx264 @ 0253e180] mb I  I16..4: 77.5%  4.0% 18.6%
  
  [libx264 @ 0253e180] 8x8 transform intra:4.0%
  
  [libx264 @ 0253e180] coded y,u,v intra: 13.7% 8.5% 8.4%
  
  [libx264 @ 0253e180] i16 v,h,dc,p: 66% 34%  0%  0%
  
  [libx264 @ 0253e180] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 29% 55%  1%  0%  0%  0%
  
   0%  2%
  
  [libx264 @ 0253e180] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 38% 14%  2%  2%  3%  3%
  
   2%  3%
  
  [libx264 @ 0253e180] kb/s:17801.76
  
  
  
  D:\ffmpegtorun\ffmpeg-20130509-git-13cb6ed-win32-static\bin\Screenshots>

  The results are a very small out.mp4 or if it was jpg and avi before files.
  For now the out.mp4 file on the hard disk is : 73.8KB

  What i want is to create in the CSHARP 100 jpg files then make one avi file of them using the ffmpeg with h264 of mpeg4 .

• ffmpeg - MXF with 4-channel audio : how to create proxies (high quality / small file size) and preserve the audio mapping

  8 juillet 2018, par WhatsYourFunction

  We’ve got MXF sources (h.264 video at UHD (3840x2160) with 4-channels of (4 - PCM S24 mono sources)
  We want Proxies — smallest file size at highest picture quality
  The compression applied to the video and audio essences can be anything,
  And the wrapper can be either MXF or QuickTime
  but we need to preserve the audio mapping (i.e. the Proxy must be 4-channel audio)

  How to do that with ffmpeg ?

  • EDIT Adding ffprobe :

  Metadata :

  uid : ***

  generation_uid : ***

  company_name : CANON

  product_name : EOS C300 Mark II

  product_version : 1.00

  product_uid : ***

  modification_date : 2018-06-28T08:29:24.000000Z

  material_package_umid : ***

  timecode : 02:50:31:17

  Duration : 00:06:35.40, start : 0.000000, bitrate : 395842 kb/s

  Stream #0:0 : Video : h264 (High 4:2:2 Intra), yuv422p10le(tv, progressive), 3840x2160, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 23.98 tbn, 47.95 tbc

  Metadata :

   file_package_umid: ***

  Stream #0:1 : Audio : pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s

  Metadata :

   file_package_umid: ***

  Stream #0:2 : Audio : pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s

  Metadata :

   file_package_umid: ***

  Stream #0:3 : Audio : pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s

  Metadata :

   file_package_umid: ***

  Stream #0:4 : Audio : pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s

  Metadata :

   file_package_umid: ***

• Revision 180cd5faa5 : General code cleanup. Removing redundant code, lower case variable names, bette

  27 mars 2013, par Dmitry Kovalev

  Changed Paths : Modify /vp9/common/vp9_entropymv.c Modify /vp9/common/vp9_extend.c Modify /vp9/common/vp9_extend.h Modify /vp9/common/vp9_postproc.c Modify /vp9/common/vp9_postproc.h Modify /vp9/decoder/vp9_dboolhuff.h Modify /vp9/decoder/vp9_onyxd_if.c (...)