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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 ?

  • Create thumbnail from a video directory using ffmpeg

    21 juillet 2017, par Shimon Wiener

    I have a project that requires me to produce a thumbnail from 2000 videos, i researched for a tool on the net and found that ffmpeg can do it, however i could not find a sample that will demonstrate how to work on a directory of videos and run on it do create thumbnail for all the videos, can any one point to a good sample
    Thanks Shimon

  • FFMPEG - VP9 - Fail to create DASH manifest file

    18 mars 2019, par Lev Bein

    Can’t create manifest.mpd file with FFMPEG.

    It writes :

    Stream mapping:
    
Stream #0:0 -> #0:0 (copy)
    
Stream #1:0 -> #0:1 (copy)
    
Could not write header for output file #0 (incorrect codec parameters ?): Invalid data found when processing input

    My code to generate manifest is :

    ffmpeg \
    
    -f webm_dash_manifest -live 1 -i video720.hdr \
    
    -f webm_dash_manifest -live 1 -i audio128.hdr \
    
    -map 0 -map 1 -c copy \
    
    -f webm_dash_manifest -y -live 1 -adaptation_sets "id=0,streams=0 id=1,streams=1" \
    
        -chunk_start_index 1 -chunk_duration_ms 2000 -time_shift_buffer_depth 7200 -minimum_update_period 7200 manifest.mpd

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