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• WebM live streaming via DASH

  4 juin 2018, par ewack

  I am following the instructions here to try to make WebM live streaming via DASH. My input is from an Axis camera and it is streaming as h264 encoding. I am using node to spin up the ffmpeg processes. I am able to create the .hdr file and the .chk files. The .mpd file is even created but it’s empty and I get an error saying :

  Could not write header for output file #0 (incorrect codec parameters ?): Operation not permittedStream mapping: Stream #0:0 -> #0:0 (copy)

  Here’s all of my code :

  var express = require('express');
  
  spawn = require('child_process').spawn;
  
  
  
  var app = express();
  
  
  
  app.use(express.static(__dirname + '/public'));
  
  
  
  app.listen(8080);
  
  console.log("Running on Port 8080");
  
  
  
  var ffmpeg1 = spawn('ffmpeg', [
  
      '-y',
  
      //video
  
      '-i', 'rtsp://admin:password@192.168.1.54:554/axis-media/media.amp?videocodec=h264&resolution=1280x720',
  
  
  
      '-map', '0:0',
  
      '-pix_fmt', 'yuv420p',
  
      '-color_range', '2',
  
      '-c:v', 'libvpx-vp9',
  
  
  
      '-s', '1280x720',
  
      '-keyint_min', '25',
  
      '-g', '25', 
  
  
  
      // //VP9_LIVE_PARAMS
  
      '-speed', '6', 
  
      '-tile-columns', '4',
  
      '-frame-parallel', '1', 
  
      '-threads', '8', 
  
      '-static-thresh', '0', 
  
      '-max-intra-rate', '300',
  
      '-deadline', 'realtime', 
  
      '-lag-in-frames', '0',
  
      '-error-resilient', '1',
  
  
  
      '-f', 'webm_chunk',
  
      '-header', 'public/glass_360.hdr',
  
      '-chunk_start_index', '1',
  
      'public/glass_360_%d.chk',
  
  ]);
  
  
  
  
  
  setTimeout(()=> {
  
    var ffmpeg2 = spawn('ffmpeg', [
  
      '-y',
  
      '-f', 'webm_dash_manifest',
  
      '-live', '1',
  
      '-i', 'public/glass_360.hdr',
  
      '-c', 'copy',
  
      '-map', '0',
  
      '-r', '25',
  
      '-framerate', '25',
  
  
  
      '-f', 'webm_dash_manifest',
  
      '-live', '1',
  
  
  
      '-adaptation_sets', '"id=0,streams=0"',
  
      '-chunk_start_index', '1',
  
      '-chunk_duration_ms', '2000',
  
      '-time_shift_buffer_depth', '7200',
  
      '-minimum_update_period', '7200',
  
  
  
      'public/glass_live_manifest.mpd'
  
    ]);
  
    ffmpeg2.stdout.on('data', 
  
        function (data) {
  
            console.log('ff2std: ' + data);
  
        }
  
    );
  
  
  
    ffmpeg2.stderr.on('data', 
  
        function (data) {
  
            console.log('ff2err: ' + data);
  
        }
  
    );
  
  }, 5000);
  
  
  
  ffmpeg1.stdout.on('data', 
  
      function (data) {
  
          console.log('ff1std: ' + data);
  
      }
  
  );
  
  
  
  ffmpeg1.stderr.on('data', 
  
      function (data) {
  
          console.log('ff1err: ' + data);
  
      }
  
  );

  Here is all of my output :

  Running on Port 8080
  
  ff1err: ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.2.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-frei0r --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.1.2/include/openjpeg-2.1 --enable-nonfree --enable-vda
  
  
  
  ff1err:   libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  
  
  ff1err: Input #0, rtsp, from 'rtsp://admin:password@192.168.1.54:554/axis-media/media.amp?videocodec=h264&resolution=1280x720':
  
    Metadata:
  
      title           : Session streamed with GStreamer
  
      comment         : rtsp-server
  
    Duration: N/A, start: 0.033344
  
  ff1err: , bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 180k tbc
  
  
  
  ff1err: [swscaler @ 0x7f8df281bc00] deprecated pixel format used, make sure you did set range correctly
  
  
  
  ff1err: [libvpx-vp9 @ 0x7f8df2800600] v1.6.1
  
  
  
  ff1err: Output #0, webm_chunk, to 'public/glass_360_%d.chk':
  
    Metadata:
  
      title           : Session streamed with GStreamer
  
      comment         : rtsp-server
  
      encoder         : Lavf57.56.101
  
  
  
  ff1err:     Stream #0:0: Video: vp9 (libvpx-vp9), yuv420p(pc), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 200 kb/s, 25 fps, 1k tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc57.64.101 libvpx-vp9
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> vp9 (libvpx-vp9))
  
  Press [q] to stop, [?] for help
  
  
  
  ff1err: frame=   10 fps=0.0 q=0.0 size=N/A time=00:00:00.36 bitrate=N/A speed=0.71x    
  
  ff1err: frame=   25 fps= 25 q=0.0 size=N/A time=00:00:00.96 bitrate=N/A speed=0.946x    
  
  ff1err: frame=   40 fps= 26 q=0.0 size=N/A time=00:00:01.56 bitrate=N/A speed=1.03x    
  
  ff1err: frame=   55 fps= 27 q=0.0 size=N/A time=00:00:02.16 bitrate=N/A speed=1.07x    
  
  ff1err: frame=   70 fps= 28 q=0.0 size=N/A time=00:00:02.76 bitrate=N/A speed=1.09x    
  
  ff1err: frame=   85 fps= 28 q=0.0 size=N/A time=00:00:03.36 bitrate=N/A speed=1.11x    
  
  ff2err: ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.2.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-frei0r --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.1.2/include/openjpeg-2.1 --enable-nonfree --enable-vda
  
  
  
  ff2err:   libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  
  
  ff2err: [webm_dash_manifest @ 0x7fbc5b80b400] Could not find codec parameters for stream 0 (Video: vp9, none, 1280x720): unspecified pixel format
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  
  
  ff2err: Input #0, webm_dash_manifest, from 'public/glass_360.hdr':
  
    Metadata:
  
      title           : Session streamed with GStreamer
  
      encoder         : Lavf57.56.101
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: vp9, none, 1280x720
  
  ff2err: , SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
  
      Metadata:
  
        webm_dash_manifest_file_name: glass_360.hdr
  
        webm_dash_manifest_track_number: 1
  
  
  
  ff2err: Could not write header for output file #0 (incorrect codec parameters ?): Operation not permittedStream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  
  
  ff2err:     Last message repeated 1 times
  
  
  
  ff1err: frame=  101 fps= 29 q=0.0 size=N/A time=00:00:04.00 bitrate=N/A speed=1.13x    
  
  ff1err: frame=  116 fps= 29 q=0.0 size=N/A time=00:00:04.60 bitrate=N/A speed=1.14x    
  
  ff1err: frame=  131 fps= 29 q=0.0 size=N/A time=00:00:05.20 bitrate=N/A speed=1.15x    
  
  ff1err: frame=  146 fps= 29 q=0.0 size=N/A time=00:00:05.80 bitrate=N/A speed=1.15x    
  
  ff1err: frame=  161 fps= 29 q=0.0 size=N/A time=00:00:06.40 bitrate=N/A speed=1.15x    
  
  ff1err: frame=  177 fps= 29 q=0.0 size=N/A time=00:00:07.04 bitrate=N/A speed=1.16x    
  
  ff1err: frame=  192 fps= 29 q=0.0 size=N/A time=00:00:07.64 bitrate=N/A speed=1.16x    
  
  ff1err: frame=  207 fps= 29 q=0.0 size=N/A time=00:00:08.24 bitrate=N/A speed=1.16x    
  
  ff1err: frame=  222 fps= 29 q=0.0 size=N/A time=00:00:08.84 bitrate=N/A speed=1.17x    
  
  ff1err: frame=  237 fps= 29 q=0.0 size=N/A time=00:00:09.44 bitrate=N/A speed=1.17x    
  
  ff1err: frame=  252 fps= 29 q=0.0 size=N/A time=00:00:10.04 bitrate=N/A speed=1.17x  

  Why is ffmpeg creating an empty .mpd file ?

• Live streaming of mp4 from Linux to Android with ffmpeg

  15 juillet 2014, par Finnfalter

  I want to stream endless live video data, e.g. from my webcam of my Ubuntu machine to an Android client. Therefore, I use ffmpeg (2.2.git) and ffserver (2.2.git) in order to encode with H.264, wrap into mp4 and, finally, stream via RTSP.

  I succeed in streaming (send, receive and play) files, e.g. with ffmpeg being configured like that :

  ffmpeg -re -i input.mp4 \
  
     -pix_fmt yuv420p \
  
     -c:v libx264 -profile:v baseline -level 3.0 \
  
     -c copy http://127.0.0.1:8888/feed1.ffm

  However, also with help of (1), (2), (3) and other articles, I do not arrive in successfully streaming ’endless’ webcam data - let alone anything Android compatible. The idea is to use fragmented mp4.

  When I try the following :

  ffmpeg -re -f v4l2 -video_size 1280x720 -i /dev/video0 \
  
     -pix_fmt yuv420p \
  
     -c:v libx264 -profile:v baseline -level 3.0 \
  
     -f mp4 -movflags frag_keyframe+empty_moov \
  
     -c copy http://127.0.0.1:8888/feed1.ffm

  ffmpeg shows errors :

  [NULL @ 0x26b3ce0] [Eval @ 0x7fffa0738a20] Undefined constant or missing '(' in 'baseline'
  
  [NULL @ 0x26b3ce0] Unable to parse option value "baseline"
  
  [NULL @ 0x26b3ce0] Error setting option profile to value baseline.
  
  [mp4 @ 0x26b2f20] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
  
  [mp4 @ 0x26b2f20] Could not find tag for codec rawvideo in stream #0, codec not currently supported in container

  With the following slight differences :

  ffmpeg \
  
     -re -f v4l2 -i /dev/video0 \
  
     -pix_fmt yuv420p \
  
     -c:v libx264 \
  
     -f mp4 -movflags frag_keyframe+empty_moov http://127.0.0.1:8888/feed2.ts

  ffmpeg starts encoding but stops after 2 seconds with the following output :

  [libx264 @ 0x2549aa0] frame=   0 QP=23.20 NAL=3 Slice:I Poc:0   I:1200 P:0    SKIP:0    size=15471 bytes

  It lets the shell crash.

  I also tried multiple variants of the configurations above. V4l2 works fine. I assume that because I can record videos from my webcam, for example.

  What do I have to do in order to stream webcam data ?

  EDIT : I use the combination of H.264, H.264’s baseline profile and mp4 because I know about Android’s compatibility. As I said, streaming works well when used with ordinary files.

• Screenshot of a udp live stream from VLC,using ffmpeg

  8 août 2017, par yash17

  I want to take a screenshot of a network stream,that is playing on VLC,on udp protocol,using ffmpeg.
  I’m able to save the recorded stream using the following command.

  ffmpeg -i udp://ip:port -c copy file_name.ts 

  But is there a way to take the screenshot without saving the file.I don’t want to take thumbnails.Thank You for your hrlp.