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• Add a maintainer for the delogo filter

  2 juillet 2013, par Jean Delvare

  Add a maintainer for the delogo filter
  I volunteer to maintain the delogo filter for at least the year to
  
  come.
  Signed-off-by : Jean Delvare <khali@linux-fr.org>
  
  patch/commit split by commiter
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] MAINTAINERS

• Is there somewhere that I can get pre-compiled libraries for reading mp4 files (MinGW32, Windows, C++)

  25 juin 2023, par Gorlash

  I would like to find a simple library that I can link to a console-mode C++ utility, to display info about mp4 files (play length, width, height, maybe bit-rate)... I don't need to write or convert data, just read and display it.

  


  The library should come with the standard SDK components :
.lib, .dll, .h, examples.c or examples.cpp, api docs
I build with MinGW 32-bit, not with Visual C++.

  


  I am developing a console media-listing utility to display interesting data about various audio/video media files. It works for almost all formats that I could wish to examine, but mp4 has ended up being a real headache !! mp3 was challenging enough, but I was able eventually to find a short example program in C that would decode the various formats, and over a couple of years I weeded out a couple of bugs with that... but mp4 puts mp3 to shame !! There don't seem to be any single-source-file utilities that will handle parsing mp4 files successfully, so I'm falling back on looking for a library that will handle this for me, with a simple API...

  


  I've looked at a number of common libraries for this purpose (ffmpeg, libvlc, opencv, Bento4, some others) but none of them come as pre-compiled libraries, ready for use, and none of them are trivial to build, especially with MinGW...

  


• Real time audio streaming from ffmpeg to browser (am I missing something ?)

  19 septembre 2022, par Яктенс Тид

  I have tried a couple of solutions already, but nothing works for me.
I want to stream audio from my PC to another computer with almost zero latency. Things are working fine so far in a sense of lagging and everything, sound is clear and not choppy at all, but there is something like a delay between the moment when audio starts playing on my PC and remote PC. For example when I click on Youtube 'play' button audio starts playing only after 3-4 seconds on the remote machine. The same when I click 'Pause', the sound on the remote PC stops after a couple of seconds.

  


  I've tried to use websockets\plain audio tag, but no luck so far.

  


  For example this is my solution by using websockets and pipes :

  


  def create_pipe():
    return win32pipe.CreateNamedPipe(r'\\.\pipe\__audio_ffmpeg', win32pipe.PIPE_ACCESS_INBOUND,
                                     win32pipe.PIPE_TYPE_MESSAGE |
                                     win32pipe.PIPE_READMODE_MESSAGE |
                                     win32pipe.PIPE_WAIT, 1, 1024 * 8, 1024 * 8, 0, None)


async def echo(websocket):
    pipe = create_pipe()
    win32pipe.ConnectNamedPipe(pipe, None)
    while True:
        data = win32file.ReadFile(pipe, 1024 * 2)
        await websocket.send(data[1])


async def main():
    async with websockets.serve(echo, "0.0.0.0", 7777):
        await asyncio.Future()  # run forever


if __name__ == '__main__':
    asyncio.run(main())


  


  The way I start ffmpeg

  


  .\ffmpeg.exe -f dshow -i audio="Stereo Mix (Realtek High Definition Audio)" -acodec libmp3lame  -ab 320k -f mp3 -probesize 32 -muxdelay 0.01 -y \\.\pipe\__audio_ffmpeg


  


  On the JS side the code is a little bit long, but essentially I am just reading a web socket and appending to buffer

  


  this.buffer = this.mediaSource.addSourceBuffer('audio/mpeg')


  


  Also as you see I tried to use -probesize 32 -muxdelay 0.01 flags, but no luck as well

  


  I tried to use plain tag as well, but still - this couple-of-seconds delay exists

  


  What can I do ? Am I missing something ? Maybe I have to disable buffering somewhere ?