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• rtsp stream capturing

  12 avril 2016, par ДМИТРИЙ МАЛИКОВ

  I’m looking for some universal way to dump rtsp stream. I want to figure out, that some rtsp stream is working well and server is sending some watchable video.

  openRTSP

  At first, google recommends me openRTSP tool.

   openRTSP -4 ${stream_link} > ${output_file}

  But output video file dumped by that tool is not really correct. Video decoder (ffdec) returns many errors like "Failed to decode video packet" and "[h264] no frame !", which don’t suit me.

  ffmpeg

  Then I’ve tried to dump rtsp stream with ffmpeg tool.

  ffmpeg -loglevel debug -i "${stream_link}" -s 640x480 -vcodec copy -acodec copy -y ${output_file}

  But streaming process was interrupted often by error :

  Application provided invalid, non monotonically increasing dts to muxer in stream 0: 730672 >= 730672
  
  av_interleaved_write_frame(): Invalid argument

  I’m trying to use --fflags igndts but ffmpeg doesn’t ignore these errors. It doesn’t make any sense, because that error actually means that audio and video streams are sending asynchronously. The worst thing is that dumped file, resulted by that interrupted dump, is not correct too. Ffdec return some error :

  ERROR [mov,mp4,m4a,3gp,3g2,mj2] moov atom not found
  
  ERROR [ffdec] av_open_input_file: Operation not permitted

  After a nice cup of googling I’ve found, that it’s really old ffmpeg’s muxer bug.

  mplayer

  Than I’ve tried to use mplayer with LIVE_555 lib.

  mplayer -noframedrop -dumpfile ${output_file} -dumpstream ${stream_link}

  But I’ve got some errors too.

  Stream not seekable!
  
  Core dumped ;)

  Question

  I think I’m doing something wrong. It’s sounds really ridiculous, that there is no way to save rtsp stream in correct and playable video-file.

  Maybe there are some another tools which can help with that task ? Actually, I will be grateful for any advice for all kind of libs and languages. But that process should be automatic and have cli.

  Refinements

  Something about 50% experiments I’ve done on the localhost with vlc-streamer that emulates rtsp-broadcaster. Here is a manual which I try to follow.

  I have really fresh and latest ffmpeg with x264 support, that I’ve installed by that useful thread.

• Revision 907016fdc7 : Remove gcc-specific __label__ Use unique names and ditch the local label declar

  21 mars 2013, par Shimon Doodkin

  Changed Paths : Modify /vp8/encoder/x86/quantize_sse2.c Remove gcc-specific __label__ Use unique names and ditch the local label declaration. Visual Studio does not support it. https://code.google.com/p/webm/issues/detail?id=561 Change-Id : (...)

• How can I put MediaRecorder output in avformat_open_input ?

  30 mars 2013, par user1914692

  I want to use ffmpeg to process the video stream from Android MediaRecorder.

  It is known that the output of the camera in a local socket instead of a file !

  mediaRecorder.setOutputFile(mSender.getFileDescriptor());

  where mSender is a local socket.

  Related code can see spydroid-ipcamera.

  Now I want to use ffmpeg to process it.
  How can I put MediaRecorder output in avformat_open_input ?

  avformat_open_input(&fmt_ctx, ????, NULL, NULL)

  What should be put in ????