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• how to deal with live raw h264 stream to send over network

  3 novembre 2015, par jinhwan

  what I want to do is that send live camera stream which is encoded by h264 to gstreamer. I already have seen many example which send over network by using rtp and mpeg-ts. But problem is that all those examples assume that the input will be served by fixed file or live stream which is already transcoded in transport portocol like below.

  client :
  gst-launch-1.0 videotestsrc horizontal-speed=5 ! x264enc tune="zerolatency" threads=1 ! mpegtsmux ! tcpserversink host=192.168.0.211 port=8554

  server : gst-launch-1.0 tcpclientsrc port=8554 host=192.168.0.211 ! tsdemux ! h264parse ! avdec_h264 ! xvimagesink

  But, My camera offer the below interface (written in java, actually work on adnroid). The interface offer just live raw h264 blocks.

  mReceivedVideoDataCallBack=newDJIReceivedVideoDataCallBack(){
  
      @Override
  
      public void onResult(byte[] videoBuffer, int size)
  
      {
  
  }

  I can create tcp session to send those data block. But, how can i make those data which is not packed in transport protocol into format which is understable by gstreamer tcpclient ?
  Transcode the original stream in ts format in the camera side can be a solution. But i have no clue to do transcode from non-file and non-transport-format data. I have searched gstreamer and ffmpeg, But I could not derive a way to deal h264 block stream using the supported interface, unitl now.
  Or, Are there any way to make gstreamer to directly accept those simple raw h264 block ?

• Adding a forced delay to ffmpeg

  26 août 2017, par GlitchedTurtle

  I am looking to capture a stream with ffmpeg and then relay it to something else in nodejs. The problem is, the host i will be using will sometimes lag and I would like to prevent this by adding a forced delay. Is this possible with ffmpeg or will I have to add this in with code ?

• How can i convert avchd(mts) to mpeg2 on ffmpeg-android

  8 décembre 2015, par ismail ballı

  This is video information ffmpeg -i on my computer

  ffmpeg version 2.8 Copyright (c) 2000-2015 the FFmpeg developers
 built with Apple LLVM version 7.0.0 (clang-700.0.72)
 configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
 libavutil      54. 31.100 / 54. 31.100
 libavcodec     56. 60.100 / 56. 60.100
 libavformat    56. 40.101 / 56. 40.101
 libavdevice    56.  4.100 / 56.  4.100
 libavfilter     5. 40.101 /  5. 40.101
 libavresample   2.  1.  0 /  2.  1.  0
 libswscale      3.  1.101 /  3.  1.101
 libswresample   1.  2.101 /  1.  2.101
 libpostproc    53.  3.100 / 53.  3.100
Input #0, mpegts, from '00002.MTS':
 Duration: 00:00:04.80, start: 1.020000, bitrate: 28108 kb/s
 Program 1
   Stream #0:0[0x1011]: Video: h264 (High) (HDPR / 0x52504448), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
   Stream #0:1[0x1100]: Audio: pcm_bluray (HDPR / 0x52504448), 48000 Hz, stereo, s16, 1536 kb/s
   Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080

  Android code here

  String[] cmd2 = new String[13];
  
      cmd2[0] = "-i";
  
      cmd2[1] = "/storage/video.mts";
  
      cmd2[2] = "-s";
  
      cmd2[3] = "1920x2080;
  
      cmd2[4] = "-c:v";
  
      cmd2[5] = "libxvid";
  
      cmd2[6] = "-c:a";
  
      cmd2[7] = "libfaac";
  
      cmd2[8] = "-ac";
  
      cmd2[9] = "2";
  
      cmd2[10] = "-strict";
  
      cmd2[11] = "-2";
  
      cmd2[12] = "/storage/video.mpg";

  -> this code error "aac channel element 0.0 is not allocated."
  How can i convert mts to mpeg2 on android with ffmpeg ?