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• Does ffmpeg rtp_mpegts muxer support setting DVB triplet ?

  19 février 2021, par drake7

  It seems ffmpeg lets you set the DVB triplet with UDP but not with RTP.

  


  FYI : This is a followup on my findings about the rtp_mpegts muxer compared to the mpegts muxer : Question

  


  In my tests I was using ffmpeg version 4.3.1-2021-01-01-full_build-www.gyan.dev on windows.

  


  findings

  


  I analyzed my streams with dectec's "StreamXpert" :

  


  


  • With UDP and it's mpegts muxer, the DVB triplet can be set (1)

    


  


  • With RTP and it's rtp_mpegts muxer, the DVB triplet is ignored (3) (Note that 3a and 3b create very similar results in "StreamXpert".)

    


  


  • Using UDP with DVB triplet as input and output with RTP ignores the DVB triplet (2)

    


  



  


  Interestingly, leaving out the following options...

  


  -pcr_period 20 -pat_period 0.10 -sdt_period 0.25 -metadata:s:a:0 language=nya \
-mpegts_flags +pat_pmt_at_frames -mpegts_flags system_b


  


  ... the rtp_mpegts muxer (3b) creates a valid DVB transport stream, while the the mpegts muxer (4) does not.

  


  ffmpeg params :

  


  



  


  muxer : mpegts (udp)

  


  ffmpeg -f lavfi -i testsrc -r 25 -c:v libx264 -pix_fmt yuv420p -profile:v main -level 3.1 -preset veryfast -vf scale=1280:720,setdar=dar=16/9 -an -bsf:v h264_mp4toannexb -b:v 4M -muxrate 8M \
-pcr_period 20 -pat_period 0.10 -sdt_period 0.25 -metadata:s:a:0 language=nya -mpegts_flags +pat_pmt_at_frames \
-mpegts_transport_stream_id 0x005A \
-mpegts_original_network_id 0x005B \
-mpegts_service_id 0x005C \
-mpegts_pmt_start_pid 0x005D -mpegts_start_pid 0x005E -mpegts_service_type advanced_codec_digital_hdtv \
-metadata service_provider="Provider foo" \
-metadata service_name="Service bar" \
-mpegts_flags system_b -flush_packets 0 \
-f mpegts "udp://239.10.33.10:1234?pkt_size=1316"


  


  



  


  muxer : rtp_mpegts (rtp)

  


  ffmpeg -i "udp://239.10.33.10:1234" -map 0 -c copy \
-f rtp_mpegts "rtp://239.10.33.11:1234?pkt_size=1316"


  


  



  


  a) muxer : rtp_mpegts (rtp)

  


  ffmpeg -f lavfi -i testsrc -r 25 -c:v libx264 -pix_fmt yuv420p -profile:v main -level 3.1 -preset veryfast -vf scale=1280:720,setdar=dar=16/9 -an -bsf:v h264_mp4toannexb -b:v 4M -muxrate 8M \
-pcr_period 20 -pat_period 0.10 -sdt_period 0.25 -metadata:s:a:0 language=nya -mpegts_flags +pat_pmt_at_frames \
-mpegts_transport_stream_id 0x005A \
-mpegts_original_network_id 0x005B \
-mpegts_service_id 0x005C \
-mpegts_pmt_start_pid 0x005D -mpegts_start_pid 0x005E -mpegts_service_type advanced_codec_digital_hdtv \
-metadata service_provider="Provider foo" \
-metadata service_name="Service bar" \
-mpegts_flags system_b -flush_packets 0 \
-f rtp_mpegts "rtp://239.10.33.10:1234?pkt_size=1316"


  


  b) muxer : rtp_mpegts (rtp) (omitting some options)

  


  ffmpeg -f lavfi -i testsrc -r 25 -c:v libx264 -vf scale=1280:720,setdar=dar=16/9 -b:v 4M -muxrate 8M \
-mpegts_transport_stream_id 0x005A \
-mpegts_original_network_id 0x005B \
-mpegts_service_id 0x005C -mpegts_pmt_start_pid 0x005D -mpegts_start_pid 0x005E \
-mpegts_service_type advanced_codec_digital_hdtv \
-metadata service_provider="Provider foo" \
-metadata service_name="Service bar" \
-f rtp_mpegts "rtp://239.10.33.10:1234"


  


  



  


  muxer : mpegts (udp) (omitting some options)

  


  ffmpeg -f lavfi -i testsrc -r 25 -c:v libx264 -vf scale=1280:720,setdar=dar=16/9 -b:v 4M -muxrate 8M \
-mpegts_transport_stream_id 0x005A \
-mpegts_original_network_id 0x005B \
-mpegts_service_id 0x005C -mpegts_pmt_start_pid 0x005D -mpegts_start_pid 0x005E \
-mpegts_service_type advanced_codec_digital_hdtv \
-metadata service_provider="Provider foo" \
-metadata service_name="Service bar" \
-f mpegts "udp://239.10.33.10:1234"


  


  Analyzing the transport stream

  


  

  


• Cannot play second sdp file with FFMPEG : Address already in use

  8 novembre 2017, par user1490563

  SUMMARY- iam not able to process two sdp files simultaneously on one machine. ffmpeg throws "bind failed : Address already in use"

  My aim to get an stream from webRTC ( via kurento ) and then trancode it to be sent to RTMP server. I was able to generate an dp file and it transcoded easily but second one gave an error - "Address already in use".

  What i have already tried -
  i have dynamically changed the video and audio port in both files so that ports do not overlap (files pasted at the end of question ).
  i was albe to see that while one stream was successfully getting transcoded,the other streams video and audio ports were blocked by the same FFMPEG instance running for the first one. I do not know why or how.
  Its possible that i may be doing some mistake.
  Requesting help. i will like to stream multiple live videos at the same time.

  first SDP file

  v=0
  
  o=- 0 0 IN IP4 127.0.0.1
  
  s=KMS
  
  c=IN IP4 127.0.0.1
  
  t=0 0
  
  m=audio 49170 RTP/AVP 97
  
  a=recvonly
  
  a=rtpmap:97 PCMU/8000
  
  a=fmtp:97 profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1508
  
  m=video 55000 RTP/AVP 96
  
  a=rtpmap:96 H264/90000
  
  a=fmtp:96 packetization-mode=1

  second SDP file :

  v=0
  
  o=- 0 0 IN IP4 127.0.0.1
  
  s=KMS
  
  c=IN IP4 127.0.0.1
  
  t=0 0
  
  m=audio 49171 RTP/AVP 97
  
  a=recvonly
  
  a=rtpmap:97 PCMU/8000
  
  a=fmtp:97 profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1508
  
  m=video 55001 RTP/AVP 96
  
  a=rtpmap:96 H264/90000
  
  a=fmtp:96 packetization-mode=1

• javacpp-presets ffmpeg : Trying to access Ebur128Context->integrated_loudness but unsuccessful

  11 avril 2019, par Sourabh Jain

  [FFMPEG] Trying to access Ebur128Context->integrated_loudness but unsuccessful , using javacpp presets

  I am trying to run ebur128Filter on audio file . similar to be doing
  [http://ffmpeg.org/doxygen/2.6/f__ebur128_8c_source.html#l00135]

  ffmpeg -i sample.wav -filter_complex ebur128=peak=true -f null -

  result of which is :

  [Parsed_ebur128_0 @ 0x7f9d38403ec0] Summary:
  
  
  
  Integrated loudness:
  
  I: -15.5 LUFS
  
  Threshold: -25.6 LUFS
  
  
  
  Loudness range:
  
  LRA: 1.5 LU
  
  Threshold: -35.5 LUFS
  
  LRA low: -16.3 LUFS
  
  LRA high: -14.8 LUFS
  
  
  
  True peak:
  
  Peak: -0.4 dBFS 

  package org.bytedeco.javacv;
  
  
  
  import org.bytedeco.javacpp.BytePointer;
  
  import org.bytedeco.javacpp.Pointer;
  
  import org.bytedeco.javacpp.avfilter;
  
  import org.junit.jupiter.api.Test;
  
  
  
  import java.io.InputStream;
  
  import java.nio.ByteBuffer;
  
  import java.util.logging.Level;
  
  import java.util.logging.Logger;
  
  
  
  import static org.bytedeco.javacpp.avutil.av_opt_get;
  
  
  
  public class LoudnessAndTruePeakTest {
  
  
  
      @Test
  
      public void ebur1228FilterTest() throws FrameFilter.Exception, FrameGrabber.Exception {
  
          Logger.getGlobal().setLevel(Level.ALL);
  
          String filter = "ebur128=peak=true:framelog=verbose";
  
          FFmpegFrameFilter fFmpegFrameFilter = new FFmpegFrameFilter(filter, 2);
  
          InputStream is = getClass().getResourceAsStream("/resources/sample.wav");
  
          FFmpegFrameGrabber fFmpegFrameGrabber = new FFmpegFrameGrabber(is);
  
          fFmpegFrameFilter.start();
  
          fFmpegFrameGrabber.start();
  
          Frame frame;
  
          while ((frame = fFmpegFrameGrabber.grabSamples()) != null) {
  
              fFmpegFrameFilter.push(frame);
  
  
  
  
  
          }
  
              printFilterState(fFmpegFrameFilter);
  
  
  
  
  
          fFmpegFrameGrabber.stop();
  
          fFmpegFrameFilter.stop();
  
  
  
      }
  
  
  
      private void printFilterState(FFmpegFrameFilter fFmpegFrameFilter) {
  
          avfilter.AVFilterContext filters = fFmpegFrameFilter.afilter_graph.filters(3);
  
          Pointer value = filters.priv();
  
          String name = filters.name().getString();
  
          System.out.println(name);
  
          Pointer pointer = new BytePointer(8);
  
          ByteBuffer buffer = pointer.asByteBuffer();
  
  
  
          av_opt_get(value, "integrated_loudness", 0, buffer);
  
          double db = buffer.getDouble();
  
          System.out.println("integrated_loudness : " + db);
  
  
  
          pointer = new BytePointer(8);
  
          buffer = pointer.asByteBuffer();
  
          av_opt_get(value, "i400.rel_threshold", 0, buffer);
  
          db = buffer.getDouble();
  
          System.out.println("i400.rel_threshold :" + db);
  
  
  
          pointer = new BytePointer(8);
  
          buffer = pointer.asByteBuffer();
  
          av_opt_get(value, "loudness_range", 0, buffer);
  
          db = buffer.getDouble();
  
          System.out.println("loudness_range :" + db);
  
  
  
          pointer = new BytePointer(8);
  
          buffer = pointer.asByteBuffer();
  
          av_opt_get(value, "i3000.rel_threshold :", 0, buffer);
  
          db = buffer.getDouble();
  
          System.out.println("i3000.rel_threshold :" + db);
  
  
  
          pointer = new BytePointer(8);
  
          buffer = pointer.asByteBuffer();
  
          av_opt_get(value, "lra_low", 0, buffer);
  
          db = buffer.getDouble();
  
          System.out.println("lra_low :" + db);
  
  
  
          pointer = new BytePointer(8);
  
          buffer = pointer.asByteBuffer();
  
          av_opt_get(value, "lra_high", 0, buffer);
  
          db = buffer.getDouble();
  
          System.out.println("lra_high :" + db);
  
      }
  
  }

  Output from program is :
  
  
  
  Input #0, wav, from 'java.io.BufferedInputStream@2a40cd94':
  
  Metadata:
  
  title : test
  
  album : test
  
  artist : test
  
  genre : Cinematic
  
  Duration: N/A, bitrate: 256 kb/s
  
  Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 8000 Hz, 2 channels, s16, 256 kb/s
  
  Invalid return value 0 for stream protocol
  
  Invalid return value 0 for stream protocol
  
  Parsed_ebur128_0
  
  integrated_loudness : 2.315841784746324E77
  
  i400.rel_threshold :2.315841784746324E77
  
  loudness_range :2.315841784746324E77
  
  i3000.rel_threshold :1.3561678660795056E248
  
  lra_low :2.315841784746324E77
  
  lra_high :2.0858062529025373E-306
  
  [Parsed_ebur128_0 @ 0x7f8942683940] Summary:
  
  
  
  Integrated loudness:
  
  I: -70.0 LUFS
  
  Threshold: 0.0 LUFS
  
  
  
  Loudness range:
  
  LRA: 0.0 LU
  
  Threshold: 0.0 LUFS
  
  LRA low: 0.0 LUFS
  
  LRA high: 0.0 LUFS
  
  
  
  True peak:
  
  Peak: -inf dBFS
  
  
  
  Process finished with exit code 0

  not sure what I am doing wrong here