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• ffmpeg stream encoding out produce a stream shows different program on each start

  15 octobre 2018, par Ryan Philip

  I am using ffmpeg for almost one year, my stream recently started behaving badly.

  The lines on ffmpeg screen started running crazy fast when restreaming it, causing more CPU (with no encoding). I have mapped the stream to select only one stream. But the problem is even with mapping I am getting different program each time when it is played.

  Also each program it is playing for less than a minute. There is no specific error message showing on ffmpeg screen. Only the output is behaving badly.

  I even tried ffmpeg version 3.3, 3.4 and 4.0 with same results.

  It has so many resolution streams, so i selected only 33 (video) and 34 (audio), the ones with highest resolution.

  ffmpeg -i "http://insourceip/stream.m3u8" -err_detect explode  -c copy -map 0:33? -map 0:34?  -hls_time 10 -hls_list_size 6 -hls_wrap 10 -start_number 1 out/music.m3u8

  Please help me with this.

  Below is the output : the one after (No longer receiving playlist 8) start running crazy when started.

  Program 11
  
      Metadata:
  
        variant_bitrate : 1088000
  
      Stream #0:33: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p, 640x480 [SAR 12:11 DAR 16:11], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Metadata:
  
        variant_bitrate : 1088000
  
      Stream #0:34: Audio: aac (LC) ([15][0][0][0] / 0x000F), 32000 Hz, stereo, fltp
  
      Metadata:
  
        variant_bitrate : 1088000
  
      Stream #0:35: Data: timed_id3 (ID3  / 0x20334449)
  
      Metadata:
  
        variant_bitrate : 1088000
  
  [hls @ 0x7a64120] Opening '/music1.ts' for writing
  
  Output #0, hls, to '/music.m3u8':
  
    Metadata:
  
      encoder         : Lavf57.71.100
  
      Stream #0:0: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p, 640x480 [SAR 12:11 DAR 16:11], q=2-31, 25 fps, 25 tbr, 90k tbn, 25 tbc
  
      Metadata:
  
        variant_bitrate : 1088000
  
      Stream #0:1: Audio: aac (LC) ([15][0][0][0] / 0x000F), 32000 Hz, stereo, fltp
  
      Metadata:
  
        variant_bitrate : 1088000
  
      Stream #0:2: Data: timed_id3 (ID3  / 0x20334449)
  
      Metadata:
  
        variant_bitrate : 1088000
  
  Stream mapping:
  
    Stream #0:33 -> #0:0 (copy)
  
    Stream #0:34 -> #0:1 (copy)
  
    Stream #0:35 -> #0:2 (copy)
  
  Press [q] to stop, [?] for help
  
  [hls,applehttp @ 0x3d57120] No longer receiving playlist 10
  
  [hls,applehttp @ 0x3d57120] No longer receiving playlist 1
  
  [hls,applehttp @ 0x3d57120] No longer receiving playlist 3
  
  [hls,applehttp @ 0x3d57120] No longer receiving playlist 5
  
  [hls,applehttp @ 0x3d57120] No longer receiving playlist 7
  
  [hls,applehttp @ 0x3d57120] No longer receiving playlist 9
  
  [hls,applehttp @ 0x3d57120] No longer receiving playlist 0
  
  [hls,applehttp @ 0x3d57120] No longer receiving playlist 2
  
  [hls,applehttp @ 0x3d57120] No longer receiving playlist 4
  
  [hls,applehttp @ 0x3d57120] No longer receiving playlist 6
  
  [hls,applehttp @ 0x3d57120] No longer receiving playlist 8
  
  ***[hls,applehttp @ 0x3d57120] Opening 'FORMATED/i/MUSIC_1@13394/segment153957897_1_av-b.ts' for reading
  
  [hls,applehttp @ 0x3d57120] Opening 'FORMATED/i/MUSIC_1@13394/segment153957898_1_av-b.ts' for reading
  
  [hls @ 0x7a64120] Opening '/music2.ts' for writing
  
  [hls @ 0x7a64120] Opening '/music.m3u8.tmp' for writing
  
  [hls,applehttp @ 0x3d57120] Opening 'FORMATED/i/MUSIC_1@13394/segment153957899_1_av-b.ts' for reading
  
  [hls @ 0x7a64120] Opening '/music3.ts' for writing***

• Playback of FFMPEG Audio Using NAudio Has Lots of Noise

  28 août 2018, par Hrethric

  I have a video that I’m trying to play back using the FFMPEG framework, and NAudio to playback the audio frames. The video plays back just fine, but when I play back the audio using a BufferedWaveProvider while the underlying audio sounds correct, it has a ton of static/noise. What’s important to note in the attached code is when the events fire off from the managed C++ class, a C# class receives the event and then grabs the latest relevant AVFrame data. This works flawlessly for video, but like I said, when I try to play back the audio I have a bunch of noise. For now I’ve hardcoded the NAudio WaveFormat settings, but they should match the video’s audio.

      ///////////////////////// C# /////////////////////////////
  
  
  
      // Gets the size of the data from the audio AVFrame (audioFrame->linesize[0])
  
      int size = _Decoder.GetAVAudioFrameSize();
  
  
  
      if (!once)
  
      {
  
          managedArray = new byte[size];
  
          once = true;
  
      }
  
  
  
      // Gets the data array from the audio AVFrame
  
      IntPtr data = _Decoder.GetAVAudioFrameData();
  
  
  
      Marshal.Copy(data, managedArray, 0, size);
  
  
  
      if (_waveProvider == null)
  
      {
  
          _waveProvider = new BufferedWaveProvider(new WaveFormat(44100, 16, 2));
  
          _waveOut.NumberOfBuffers = 2;
  
          _waveOut.DesiredLatency = 300;
  
          _waveOut.Init(_waveProvider);
  
          _waveOut.Play();
  
      }
  
  
  
      _waveProvider.AddSamples(managedArray, 0, size);
  
  
  
  
  
      //////////////////////// Managed C++ /////////////////////////
  
      while (_shouldRead)
  
      {
  
          // if we're not initialized, sleep
  
          if (!_initialized || !_FFMpegObject->AVFormatContextReady())
  
          {
  
              Thread::Sleep(READ_INIT_WAIT_TIME);
  
          }
  
          else if (_sequentialFailedReadCount > MAX_SEQUENTIAL_READ_FAILS)
  
          {
  
              // we've failed a lot and probably lost the stream, try to reconnect.
  
              _sequentialFailedReadCount = 0;
  
              _initialized = false;
  
              StartInitThread();
  
              Thread::Sleep(READ_INIT_WAIT_TIME << 1);
  
          }
  
          else // otherwise, try reading one AV packet 
  
          {
  
              if (_FFMpegObject->AVReadFrame())
  
              {
  
                  if (_FFMpegObject->GetAVPacketStreamIndex() == _videoStreamIndex)
  
                  {
  
                      _sequentialFailedReadCount = 0;
  
  
  
                      // decode the video packet
  
                      _frameLock->WaitOne();
  
                      frameFinished = _FFMpegObject->AVCodecDecodeVideo2();
  
                      _frameLock->ReleaseMutex();
  
  
  
                      if (frameFinished)
  
                      {
  
                          _framesDecoded++;
  
  
  
                          if (!_isPaused) // If paused and AFAP playback, just don't call the callback
  
                          {
  
                              FrameFinished(this, EventArgs::Empty);
  
  
  
                              Thread::Sleep((int)(1000 / (GetFrameRate() * _speed)));
  
                          }
  
                      }
  
                  }
  
                  else if (_FFMpegObject->GetAVPacketStreamIndex() == _audioStreamIndex)
  
                  {
  
                      // decode the audio packet.
  
                      _frameLock->WaitOne();
  
                      audioFrameFinished = _FFMpegObject->AVCodecDecodeAudio4();
  
                      _frameLock->ReleaseMutex();
  
  
  
                      if (audioFrameFinished)
  
                      {
  
                          if (!_isPaused) // If paused and AFAP playback, just don't call the callback
  
                          {
  
                              // Fire the event - leaving it up to video to do the sleeps -- not sure if that will work or not
  
                              AudioFrameFinished(this, EventArgs::Empty);
  
                          }
  
                      }
  
                  }
  
  
  
                  _FFMpegObject->AVFreeFramePacket();
  
  
  
              }
  
              else // failed to read an AV packet
  
              {
  
                  _sequentialFailedReadCount++;
  
                  _failedReadCount++;
  
                  Thread::Sleep(READ_FAILED_WAIT_TIME);
  
              }
  
          }
  
      }

• MPD MPEG-DASH - Shows only one bitrate

  13 août 2018, par Justin Rec

  Help. I wont show bitrate.
  player.getBitrateInfoListFor("video") ;
  Shows only one bitrate - 454948

  manifest.mpd generated by GPAC

   <period duration="PT0H21M48.338S">
  
    <adaptationset segmentalignment="true" group="1" maxwidth="270" maxheight="480" maxframerate="2070000/93437" par="270:480" lang="und">
  
     <representation mimetype="video/mp4" codecs="avc3.640015" width="270" height="480" framerate="2070000/93437" sar="1:1" startwithsap="1" bandwidth="454948">
  
      <segmenttemplate media="480_bbb/segment__track1_$Number$.m4s" timescale="2070000" startnumber="1" duration="8280000" initialization="480_bbb/segment__track1_init.mp4"></segmenttemplate>
  
     </representation>
  
    </adaptationset>
  
    <adaptationset segmentalignment="true" group="1" maxwidth="202" maxheight="360" maxframerate="2070000/93437" par="202:360" lang="und">
  
     <representation mimetype="video/mp4" codecs="avc3.64000D" width="202" height="360" framerate="2070000/93437" sar="1:1" startwithsap="1" bandwidth="281508">
  
      <segmenttemplate media="360_bbb/segment__track1_$Number$.m4s" timescale="2070000" startnumber="1" duration="8280000" initialization="360_bbb/segment__track1_init.mp4"></segmenttemplate>
  
     </representation>
  
    </adaptationset>
  
    <adaptationset segmentalignment="true" group="1" maxwidth="134" maxheight="240" maxframerate="2070000/93437" par="134:240" lang="und">
  
     <representation mimetype="video/mp4" codecs="avc3.64000B" width="134" height="240" framerate="2070000/93437" sar="1:1" startwithsap="1" bandwidth="182832">
  
      <segmenttemplate media="240_bbb/segment__track1_$Number$.m4s" timescale="2070000" startnumber="1" duration="8280000" initialization="240_bbb/segment__track1_init.mp4"></segmenttemplate>
  
     </representation>
  
    </adaptationset>
  
    <adaptationset segmentalignment="true" group="1" maxwidth="80" maxheight="144" maxframerate="2070000/93437" par="80:144" lang="und">
  
     <representation mimetype="video/mp4" codecs="avc3.640009" width="80" height="144" framerate="2070000/93437" sar="1:1" startwithsap="1" bandwidth="99667">
  
      <segmenttemplate media="144_bbb/segment__track1_$Number$.m4s" timescale="2070000" startnumber="1" duration="8280000" initialization="144_bbb/segment__track1_init.mp4"></segmenttemplate>
  
     </representation>
  
    </adaptationset>
  
    <adaptationset segmentalignment="true" lang="und">
  
     <representation mimetype="audio/mp4" codecs="mp4a.40.2" startwithsap="1" bandwidth="66056">
  
      <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="1"></audiochannelconfiguration>
  
      <segmenttemplate media="audio_bbb/segment__track2_$Number$.m4s" timescale="48000" startnumber="1" duration="192000" initialization="audio_bbb/segment__track2_init.mp4"></segmenttemplate>
  
     </representation>
  
    </adaptationset>
  
   </period>

  player.getBitrateInfoListFor("video") ;
  Shows only one bitrate - 454948