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• C++ Send mpeg over http FFmpeg [on hold]

  10 mai 2014, par Titouan42

  I have a streaming server (nodejs) which listen a mpeg stream over http,
  by using this code.

  Currently, I feed my server using ffmpeg tool as below :

  ffmpeg -s 640x480 -f video4linux2 -i /dev/video0 -f mpeg1video \
  
   b 800k -r 30 http://example.com:8082/yourpassword/640/480/
  

  Now, I would like to do similar job by feeding the nodejs server using a C++ code, that acquire frame with OpenCV then encode and send it with ffmpeg.

  Help please !

• Revision 20babf6d9d : Don't try to use getenv on windows phone/rt The getenv function doesn't exist t

  29 mai 2013, par Martin Storsjo

  Changed Paths :
   Modify /vpx_ports/arm_cpudetect.c

  
  
  Don’t try to use getenv on windows phone/rt

  The getenv function doesn’t exist there. In Visual Studio 2012,
  the function still existed in the link libraries even though
  it was hidden in the headers, but in the 2013 version it has been
  removed from the link libraries as well.

  Change-Id : Iea6289a698fa1788e906f5aabb6fddda3675815b

• With ffmpeg, trying to change a container from Mpeg TS to MP4, fps became twice of Mpeg TS

  17 juillet 2016, par user2148481

  I got a Mpeg TS file from a capture board to make a DEMO video clip.

  Here is information of the file from ffmpeg ;

  Stream #0:0[0x51]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
  
  Stream #0:1[0x61]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 224 kb/s

  However, I cannot edit it in FCP X, so I tried to change just its container TS to MP4 with ffmpeg using the below command.

  ffmpeg -i input.ts -vcodec copy -acodec copy output.mp4

  After doing it, fps of output.mp4 became 59.94 fps and information is like below ;

  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 1750 kb/s, 59.94 fps, 59.94 tbr, 90k tbn, 59.94 tbc
  
  Stream #0:1(und): Audio: mp2 (mp4a / 0x6134706D), 48000 Hz, stereo, s16p, 224 kb/s

  Fps is not same.

  Is there a way to keep same fps as TS with just copy option to change a container ?

  I am wondering whether just re-encoding is solution or not.

  /////

  Full logs ;

  $ ffmpeg -i input.ts -vcodec copy -acodec copy output.mp4
  
  ffmpeg version 1.1.2 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Feb  6 2013 10:45:57 with Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
  
    configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libspeex --enable-libfreetype --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid
  
    libavutil      52. 13.100 / 52. 13.100
  
    libavcodec     54. 86.100 / 54. 86.100
  
    libavformat    54. 59.106 / 54. 59.106
  
    libavdevice    54.  3.102 / 54.  3.102
  
    libavfilter     3. 32.100 /  3. 32.100
  
    libswscale      2.  1.103 /  2.  1.103
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  [mpegts @ 0x7f8a2b033000] max_analyze_duration 5000000 reached at 5003333
  
  Input #0, mpegts, from 'input.ts':
  
    Duration: 00:05:01.27, start: 0.224400, bitrate: 2727 kb/s
  
    Program 1 
  
      Stream #0:0[0x51]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
  
      Stream #0:1[0x61]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 224 kb/s
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf54.59.106
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 29.97 fps, 90k tbn, 90k tbc
  
      Stream #0:1: Audio: mp2 (i[0][0][0] / 0x0069), 48000 Hz, stereo, 224 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [mp4 @ 0x7f8a2b058200] pts has no value
  
  frame=13472 fps=0.0 q=-1.0 size=   54536kB time=00:03:44.80 bitrate=1987.3kbits/frame=18056 fps=0.0 q=-1.0 Lsize=   73024kB time=00:05:01.28 bitrate=1985.5kbits/s    
  
  video:64370kB audio:8212kB subtitle:0 global headers:0kB muxing overhead 0.608498%