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• flac : Fix handling of raw input option.

  28 juin 2014, par Erik de Castro Lopo

  flac : Fix handling of raw input option.
  FLAC was silently ignoring options for raw input for encoding mode (but
  
  prints an error and aborts when _de_coding).
  This can lead to bug reports such as https://sourceforge.net/p/flac/bugs/389/
  FLAC now prints a message about options misuse for encoding mode.
  Help messages were also updated.
  Patch-from : lvqcl <lvqcl.mail@gmail.com>
  

  • [DH] src/flac/main.c

• Re-encode and stream UDP TV Channels

  12 décembre 2018, par Tomy137

  I used from long time mumudvb and one dvb-t pci card to stream TV channels on my network. This is working fine but I’ve recently add another player that is less powerfull than others so I want to re-encode the video stream.

  This is my input stream video :

  Input #0, mpegts, from 'udp://@239.1.4.1:8200':
  
    Duration: N/A, start: 53843.533922, bitrate: N/A
  
    Program 1025 
  
      Metadata:
  
        service_name    : M6
  
        service_provider: Multi4
  
      Stream #0:0[0x78]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709), 1920x1080 [   SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0:1[0x82](fra): Audio: eac3 ([6][0][0][0] / 0x0006), 48000 Hz, 5.1(side), fltp, 192 kb/s
  
      Stream #0:2[0x83](qad): Audio: eac3 ([6][0][0][0] / 0x0006), 48000 Hz, stereo, fltp, 96 kb/s
  
      Stream #0:3[0x84](qaa): Audio: eac3 ([6][0][0][0] / 0x0006), 48000 Hz, stereo, fltp, 128 kb/s
  
      Stream #0:4[0x8c](fra): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006) (hearing impaired)
  
      Stream #0:5[0x8d](fra): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
  
      Stream #0:6[0xaa]: Unknown: none ([5][0][0][0] / 0x0005)
  
      Stream #0:7[0xab]: Unknown: none ([11][0][0][0] / 0x000B)

  ffmpeg version 3.0.1
  Running on Ubuntu 12.04.5 LTS

  And this is my command line to run ffmpeg :

  ffmpeg -i udp://@239.1.4.1:8200 -qscale:v:0 7 -c:v:0 mpeg4 -b:v:0 4000k -minrate:v 0 -maxrate:v 4000k -bufsize:v 5000k -s hd720 -c:a copy -f mpegts udp://239.1.24.1:8200?pkt_size=1316

  But when I do this, I’ve got errors like this on my VLC player :

  [00007f2ff3ad64c0] main audio output debug: inserting 35549 zeroes
  
  [00007f2ff3ad64c0] main audio output warning: playback too early (-55552): down-sampling
  
  [00007f2ff3adc4c0] xcb vout display debug: display is visible
  
  [00007f2ff3ad64c0] main audio output debug: resampling stopped (drift: -13228 us)
  
  [00007f300dd870c0] main video output warning: picture is too late to be displayed (missing 33 ms)
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 2 ms)
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 4 ms)
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 0 ms)
  
  [00007f300dd870c0] main video output warning: picture is too late to be displayed (missing 22 ms)
  
  [00007f2ff3ad64c0] main audio output warning: playback too early (-40559): down-sampling
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 8 ms)
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 13 ms)
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 3 ms)
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 3 ms)
  
  [00007f2ff3ad64c0] main audio output debug: resampling stopped (drift: 1666 us)
  
  [00007f2ff3ad64c0] main audio output warning: playback way too early (-130510): playing silence
  
  [00007f2ff3ad64c0] main audio output debug: inserting 6264 zeroes
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 13 ms)
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 15 ms)
  
  [00007f2ff3ad64c0] main audio output warning: playback too early (-41304): down-sampling
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 10 ms)
  
  [00007f300dd870c0] main video output warning: picture is too late to be displayed (missing 54 ms)
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 15 ms)
  
  [00007f2ff3ad64c0] main audio output warning: timing screwed (drift: -105734 us): stopping resampling
  
  [00007f2ff3ad64c0] main audio output warning: playback too early (-105702): down-sampling
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 10 ms)
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 10 ms)
  
  [00007f300dd870c0] main video output warning: picture is too late to be displayed (missing 60 ms)
  
  [00007f300dd870c0] main video output warning: picture is too late to be displayed (missing 20 ms)
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 14 ms)
  
  [00007f300dd870c0] main video output debug: picture might be displayed late (missing 13 ms)
  
  [00007f300dd870c0] main video output warning: picture is too late to be displayed (missing 61 ms)
  
  [00007f300dd870c0] main video output warning: picture is too late to be displayed (missing 25 ms)
  
  [00007f2ff3ad64c0] main audio output debug: resampling stopped (drift: -40141 us)
  
  [00007f2ff3ad64c0] main audio output warning: playback too early (-40140): down-sampling
  
  [00007f2ff3ad64c0] main audio output warning: playback too late (91622): up-sampling
  
  [00007f2ff3ad64c0] main audio output debug: resampling stopped (drift: 120767 us)
  
  [00007f2ff3ad64c0] main audio output warning: playback too late (120781): up-sampling
  
  [00007f300dd870c0] main video output warning: picture is too late to be displayed (missing 64 ms)
  
  [00007f300dd870c0] main video output warning: picture is too late to be displayed (missing 25 ms)
  
  [00007f300dd870c0] main video output warning: picture is too late to be displayed (missing 31 ms)

  On web-plugin VLC media player - 3.0.3 Vetinari running on Ubuntu 16.04.3 LTS

  This is resulting on many glitch on VLC video and after some times audio and video become de-synchronised.

  For some reasons, I can’t update VLC / FFMPEG / Ubuntu

  Can you help me with that ?

  Thanks in advance for your time !

• ffmpeg/libav with Qt Creator - unresolved external symbol

  12 septembre 2015, par Alexandre

  I am attempting to integrate ffmpeg into my C++/Qt application in Qt Creator. I have tried to make it as barebones as possible to isolate the problem.
  I am using Zeranoe’s 32-bit ffmpeg dev build.

  Here is the error returned :

  main.obj :-1 : error : LNK2019 : unresolved external symbol av_register_all referenced in function main

  Here is ffmpegTest.pro :

  INCLUDEPATH += $$PWD/ffmpeg/include
  
  
  
  TARGET = ffmpegTest
  
  
  
  SOURCES += main.cpp
  
  
  
  LIBS += -L$$PWD/ffmpeg/lib\
  
          -lavcodec\
  
          -lavformat\
  
          -lavdevice\
  
          -lswscale\
  
          -lavutil\
  
          -ldsound\

  And here is main.cpp :

  extern "C"{
  
      #include <libavcodec></libavcodec>avcodec.h>
  
      #include <libavformat></libavformat>avformat.h>
  
  }
  
  
  
  int main(int argc, char *argv[])
  
  {
  
      av_register_all();
  
  }

  And here is a screenshot of the project directory :

  http://i.stack.imgur.com/enqmg.png (I do not have enough reputation to embed an image)

  Inside the ffmpeg directory is Zeranoe’s build.