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• Capture video from webcam using ffmpeg - finish streaming without any data to written it

  7 septembre 2017, par Robert

  I have webcam in my computer and ffmpeg 3.3.0
  I run this command :

  ffmpeg -y -f vfwcap -r 25 -i 0 out1.mp4

  I have no errors but the output file is empty.

  c:\..\bin>ffmpeg -y -f vfwcap -r 25 -i 0 out1.mp4
  
  ffmpeg version N-87130-g2b9fd15 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 7.1.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --e
  
  nable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --
  
  enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv
  
  --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-li
  
  bfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug -
  
  -enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enabl
  
  e-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-li
  
  bsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolam
  
  e --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
  
   --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable
  
  -libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
    libavutil      55. 74.100 / 55. 74.100
  
    libavcodec     57.104.100 / 57.104.100
  
    libavformat    57. 79.100 / 57. 79.100
  
    libavdevice    57.  8.100 / 57.  8.100
  
    libavfilter     6.101.100 /  6.101.100
  
    libswscale      4.  7.103 /  4.  7.103
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
  Input #0, vfwcap, from '0':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, 25 fps,
  
  1k tbr, 1k tbn, 1k tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  Finishing stream 0:0 without any data written to it.
  
  [libx264 @ 00000000004f5160] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  
  AVX FMA3 BMI2 AVX2
  
  [libx264 @ 00000000004f5160] profile High 4:2:2, level 3.0, 4:2:2 8-bit
  
  [libx264 @ 00000000004f5160] 264 - core 152 r2851 ba24899 - H.264/MPEG-4 AVC cod
  
  ec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 r
  
  ef=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_pski
  
  p=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 deci
  
  mate=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=2
  
  5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.6
  
  0 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'out1.mp4':
  
    Metadata:
  
      encoder         : Lavf57.79.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv422p, 640x480, q=
  
  -1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc57.104.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A speed=
  
   0x
  
  video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing ove
  
  rhead: unknown
  
  Exiting normally, received signal 2.
  
  
  
  c:\..\bin>

  My operating system is Windows 7.

• FFmpeg DTS out of order

  23 septembre 2016, par Tim's

  I’m having this problem when I want to concat and record two mp4 vids with ffmpeg. The output I get is :

  [concat @ 0x2566e80] DTS 4079 < 8156 out of order0:02:43.12 bitrate= 291.3kbits/s

  Complete output :

  /opt/ffmpeg/ffmpeg -f concat -i liste.txt -strict -2 -c:v libx264 -c:a aac output.mp4
  
  ffmpeg version N-66233-g16de4d9 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Sep 11 2014 18:19:48 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
    configuration: --enable-gpl --enable-libx264
  
    libavutil      54.  7.100 / 54.  7.100
  
    libavcodec     56.  1.100 / 56.  1.100
  
    libavformat    56.  4.101 / 56.  4.101
  
    libavdevice    56.  0.100 / 56.  0.100
  
    libavfilter     5.  1.100 /  5.  1.100
  
    libswscale      3.  0.100 /  3.  0.100
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  0.100 / 53.  0.100
  
  Input #0, concat, from 'liste.txt':
  
    Duration: N/A, start: 0.000000, bitrate: 681 kb/s
  
      Stream #0:0: Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 636x360, 585 kb/s, 25 fps, 25 tbr, 50 tbn, 50 tbc
  
      Stream #0:1: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 96 kb/s
  
  [libx264 @ 0x278f760] using cpu capabilities: MMX2 SSE2Fast SSSE3
  
  [libx264 @ 0x278f760] profile High, level 3.0
  
  [libx264 @ 0x278f760] 264 - core 142 r2431 ac76440 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - 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 trel                                                                                                       lis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=1 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 in                                                                                                       terlaced=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 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf56.4.101
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 636x360, q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc56.1.100 libx264
  
      Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc56.1.100 aac
  
  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
  
  [concat @ 0x2690e00] DTS 4079 < 8156 out of order0:02:43.12 bitrate= 676.2kbits/s
  
  frame= 5060 fps= 10 q=28.0 Lsize=   20857kB time=00:06:44.60 bitrate= 422.3kbits/s dup=0 drop=5055
  
  video:14484kB audio:6193kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.864065%
  
  [libx264 @ 0x278f760] frame I:27    Avg QP:19.39  size: 27262
  
  [libx264 @ 0x278f760] frame P:2986  Avg QP:24.08  size:  3879
  
  [libx264 @ 0x278f760] frame B:2047  Avg QP:26.48  size:  1228
  
  [libx264 @ 0x278f760] consecutive B-frames: 34.9% 30.6%  8.8% 25.7%
  
  [libx264 @ 0x278f760] mb I  I16..4: 10.8% 45.8% 43.4%
  
  [libx264 @ 0x278f760] mb P  I16..4:  4.0%  7.1%  3.5%  P16..4: 25.5% 11.1%  4.2%  0.0%  0.0%    skip:44.6%
  
  [libx264 @ 0x278f760] mb B  I16..4:  0.4%  0.6%  0.8%  B16..8: 23.8%  5.9%  1.2%  direct: 1.0%  skip:66.4%  L0:51.2% L1:42.6% BI: 6.2%
  
  [libx264 @ 0x278f760] 8x8 transform intra:47.3% inter:58.5%
  
  [libx264 @ 0x278f760] coded y,uvDC,uvAC intra: 51.2% 63.2% 24.8% inter: 10.5% 13.1% 1.1%
  
  [libx264 @ 0x278f760] i16 v,h,dc,p: 18% 46% 10% 26%
  
  [libx264 @ 0x278f760] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 29% 20%  4%  4%  4%  5%  5%  6%
  
  [libx264 @ 0x278f760] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 23% 13%  5%  7%  7%  7%  6%  6%
  
  [libx264 @ 0x278f760] i8c dc,h,v,p: 48% 26% 19%  8%
  
  [libx264 @ 0x278f760] Weighted P-Frames: Y:2.2% UV:1.6%
  
  [libx264 @ 0x278f760] ref P L0: 78.9% 11.3%  7.2%  2.6%  0.0%
  
  [libx264 @ 0x278f760] ref B L0: 94.7%  4.9%  0.4%
  
  [libx264 @ 0x278f760] ref B L1: 97.8%  2.2%
  
  [libx264 @ 0x278f760] kb/s:586.22

  I have also tried others ffmepg options like : -preset -vcodec libx264 -crf 25 -s 360x288 -vpre veryslow -c aac -ar 44100 -ab 56k with no success. Can someone help me ?

• G.I. Joe Custom Multimedia

  30 mars 2012, par Multimedia Mike — General

  I received this 3-disc set of G.I. Joe CD-ROMs today :

  
  
  

  Copyright 2003, and labeled as PC ONLY. Each disc claims to have 2 episodes. So are these some sort of video discs ? Any gaming elements ? I dove in to investigate.

  So, it turns out that there are some games on these discs, done in Flash Player (which tells me that these were probably available on the web at some point). Here’s a shooting gallery game from the first disc :

  
  
  

  As promised by the CD-ROM copy, the menu does grant access to 2 classic G.I. Joe episodes. Selecting either one launches this :

  
  
  

  Powered by C-ezy ? Am I interpreting that correctly ? Anyway, the video player goes fullscreen and looks fine (given the source material). I can’t capture screenshots and controls are limited to : space for pause, ESC to exit player, and up/down to control volume. No seeking and certainly no onscreen controls. Pretty awful player.

  Studying the first disc, I find a 550 MB file with the name 5859Hasbro.egm. Coupled with ep58.cfg and ep59.cfg files in the same directory, I gather that the disc has G.I. Joe episodes 58 and 59 (though the exact episodes, “There’s No Place Like Springfield” parts 1 and 2, are listed on Wikipedia as being episodes 154 and 155 ; but who’s counting ?). The cfg files contain this text :

  ep58.cfg :
  EGM_GIJOE.exe
  5859Hasbro.egm /noend /track:0 /singletrack
  ep59.cfg :
  
  EGM_GIJOE.exe
  
  5859Hasbro.egm /noend /track:1 /singletrack
  

  The big EGM file starts with the string “Egenie Player”. After that, I see absolutely no clues. The supporting EGM_GIJOE.exe file has some interesting strings : “Decore Bits Per Pixel” (I know I have seen “Decore” used to mean “decoding core” in some libraries), “Egenie Player – %s, Version :%s”, “4th June 2002″, a list of common FourCC tags seen in AVI files, “Brought to you by Martin, Patrick Bob and Bren” (do you suppose “Patrick Bob” is one person’s name ?), a list of command line options…

  Aha ! A URL : http:\www.e-genie.tv (yep, backslashes, not forward slashes). e-genie.tv seems to redirect to mygenie.tv, which… doesn’t appear to be strictly related to video technology these days.