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• FFMPEG : How to chose a stream from all stream

  17 janvier 2020, par Ali

  I try to convert a UDP stream (that genrated from DVB signal) to HLS m3u8 file with this code :

  ffmpeg -i udp://239.1.2.1:60001 -acodec aac -strict -2 -vcodec libx264 -hls_wrap 100 -f hls /var/www/html/ts/1.m3u8 

  UDP stream contain 1 channel (in this case IRIB-TV1).

  When I run this above code, ffmpeg detect all of service and channel that streamed from DVB card with this message :

  Input #0, mpegts, from 'udp://239.1.2.1:60001':
  
  Duration: N/A, start: 77906.812644, bitrate: N/A
  
  Program 101 
  
  Metadata:
  
    service_name    : IRIB-TV1
  
    service_provider: IRIB
  
  Stream #0:0[0x3f2]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt470bg), 720x576 [SAR 12:11 DAR 15:11], 25 fps, 50 tbr, 90k tbn, 50 tbc
  
  Stream #0:1[0x3f3](per): Audio: aac_latm ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp
  
  Program 102 
  
  Metadata:
  
    service_name    : IRIB-TV2
  
    service_provider: IRIB
  
  Program 103 
  
  Metadata:
  
    service_name    : IRIB-TV3
  
    service_provider: IRIB
  
  Program 104 
  
  Metadata:
  
    service_name    : IRIB-TV4
  
    service_provider: IRIB

  As you see ffmpeg finf 4 channel in UDP stream, But VLC play only channel 1(IRIB-TV1).

  Now I have have 2 question :

  1-Can I get all channel and service via this ffmpeg code ?

  2-Can I choose a special stream from this ffmpeg code ?(I know that ffmpeg can choose a stream with -map option but I want to choose other service_name that in output log)

  output file is :

   ffmpeg version 2.4.3-1ubuntu1~trusty6 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Nov 22 2014 17:07:19 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
    configuration: --prefix=/usr --extra-version='1ubuntu1~trusty6' --build-suffix=-ffmpeg --toolchain=hardened --extra-cflags= --extra-cxxflags= --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-fontconfig --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-opengl --enable-x11grab --enable-libxvid --enable-libx265 --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libx264 --enable-libsoxr --enable-openal --enable-libopencv
  
    libavutil      54.  7.100 / 54.  7.100
  
    libavcodec     56.  1.100 / 56.  1.100
  
    libavformat    56.  4.101 / 56.  4.101
  
    libavdevice    56.  0.100 / 56.  0.100
  
    libavfilter     5.  1.100 /  5.  1.100
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  0.100 /  3.  0.100
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  0.100 / 53.  0.100
  
  Splitting the commandline.
  
  Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
  
  Reading option '-timeout' ... matched as AVOption 'timeout' with argument '6000000'.
  
  Reading option '-i' ... matched as input file with argument 'udp://239.1.2.1:60001?fifo_size=50000'.
  
  Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'copy'.
  
  Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'copy'.
  
  Reading option '-preset' ... matched as AVOption 'preset' with argument 'ultrafast'.
  
  Reading option '-flags' ... matched as AVOption 'flags' with argument '-global_header'.
  
  Reading option '-f' ... matched as option 'f' (force format) with argument 'hls'.
  
  Reading option '-hls_time' ... matched as AVOption 'hls_time' with argument '20'.
  
  Reading option '-hls_wrap' ... matched as AVOption 'hls_wrap' with argument '5'.
  
  Reading option '/var/www/html/ts/1.m3u8' ... matched as output file.
  
  Finished splitting the commandline.
  
  Parsing a group of options: global .
  
  Applying option loglevel (set logging level) with argument debug.
  
  Successfully parsed a group of options.
  
  Parsing a group of options: input file udp://239.1.2.1:60001?fifo_size=50000.
  
  Successfully parsed a group of options.
  
  Opening an input file: udp://239.1.2.1:60001?fifo_size=50000.
  
  [udp @ 0x1967040] end receive buffer size reported is 131072
  
  [mpegts @ 0x1977380] Format mpegts probed with size=2048 and score=100
  
  [mpegts @ 0x1977380] stream=0 stream_type=1b pid=3f2 prog_reg_desc=
  
  [mpegts @ 0x1977380] stream=1 stream_type=11 pid=3f3 prog_reg_desc=
  
  [mpegts @ 0x1977380] Before avformat_find_stream_info() pos: 0 bytes read:14476 seeks:0
  
  [mpegts @ 0x1977380] parser not found for codec none, packets or times may be invalid.
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [mpegts @ 0x1977380] probing stream 1 pp:2500
  
  [mpegts @ 0x1977380] Probe with size=853, packets=1 detected loas with score=51
  
  [mpegts @ 0x1977380] probed stream 1
  
  [aac_latm @ 0x199e4e0] initializing latmctx
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] decode_slice_header error
  
  [h264 @ 0x199cc60] no frame!
  
  [h264 @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [h264 @ 0x199cc60] Frame num gap 397 393
  
  [h264 @ 0x199cc60] Frame num gap 397 394
  
  [h264 @ 0x199cc60] Frame num gap 397 395
  
  [h264 @ 0x199cc60] mmco: unref short failure
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] number of reference frames (0+4) exceeds max (3; probably corrupt input), discarding one
  
  [h264 @ 0x199cc60] no picture ooo
  
  [h264 @ 0x199cc60] Increasing reorder buffer to 2
  
  [h264 @ 0x199cc60] no picture ooo
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] no picture 
  
      Last message repeated 1 times
  
  [h264 @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
      Last message repeated 3 times
  
  [mpegts @ 0x1977380] max_analyze_duration 5000000 reached at 5034667 microseconds
  
  [mpegts @ 0x1977380] After avformat_find_stream_info() pos: 1142476 bytes read:1143604 seeks:0 frames:397
  
  Input #0, mpegts, from 'udp://239.1.2.1:60001?fifo_size=50000':
  
    Duration: N/A, start: 43581.024200, bitrate: N/A
  
    Program 101 
  
      Metadata:
  
        service_name    : IRIB-TV1
  
        service_provider: IRIB
  
      Stream #0:0[0x3f2], 274, 1/90000: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt470bg), 720x576 [SAR 12:11 DAR 15:11], 1/50, 25 fps, 50 tbr, 90k tbn, 50 tbc
  
      Stream #0:1[0x3f3](per), 123, 1/90000: Audio: aac_latm ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp
  
    Program 102 
  
      Metadata:
  
        service_name    : IRIB-TV2
  
        service_provider: IRIB
  
    Program 103 
  
      Metadata:
  
        service_name    : IRIB-TV3
  
        service_provider: IRIB
  
    Program 104 
  
      Metadata:
  
        service_name    : IRIB-TV4
  
        service_provider: IRIB
  
    Program 105 
  
      Metadata:
  
        service_name    : IRIB-TV5
  
        service_provider: IRIB
  
    Program 106 
  
      Metadata:
  
        service_name    : IRINN
  
        service_provider: IRIB
  
    Program 107 
  
      Metadata:
  
        service_name    : AMOOZESH
  
        service_provider: IRIB
  
    Program 108 
  
      Metadata:
  
        service_name    : QURAN
  
        service_provider: IRIB
  
    Program 119 
  
      Metadata:
  
        service_name    : SALAMAT
  
        service_provider: IRIB
  
    Program 120 
  
      Metadata:
  
        service_name    : NASIM
  
        service_provider: IRIB
  
    Program 151 
  
      Metadata:
  
        service_name    : RADIO IRAN
  
        service_provider: IRIB
  
    Program 152 
  
      Metadata:
  
        service_name    : RADIO PAYAM
  
        service_provider: IRIB
  
    Program 153 
  
      Metadata:
  
        service_name    : RADIO JAVAN
  
        service_provider: IRIB
  
    Program 154 
  
      Metadata:
  
        service_name    : RADIO MAAREF
  
        service_provider: IRIB
  
    Program 155 
  
      Metadata:
  
        service_name    : RADIO QURAN
  
        service_provider: IRIB
  
    Program 156 
  
      Metadata:
  
        service_name    : RADIO FARHANG
  
        service_provider: IRIB
  
    Program 157 
  
      Metadata:
  
        service_name    : RADIO SALAMAT
  
        service_provider: IRIB
  
    Program 158 
  
      Metadata:
  
        service_name    : RADIO VARZESH
  
        service_provider: IRIB
  
    Program 159 
  
      Metadata:
  
        service_name    : RADIO EGHTESAD
  
        service_provider: IRIB
  
    Program 160 
  
      Metadata:
  
        service_name    : RADIO TEHRAN
  
        service_provider: IRIB
  
    Program 161 
  
      Metadata:
  
        service_name    : RADIO AVAA
  
        service_provider: IRIB
  
    Program 162 
  
      Metadata:
  
        service_name    : RADIO NAMAYESH
  
        service_provider: IRIB
  
    Program 163 
  
      Metadata:
  
        service_name    : RADIO SABA
  
        service_provider: IRIB
  
    Program 164 
  
      Metadata:
  
        service_name    : English Radio World Service
  
        service_provider: IRIB
  
    Program 166 
  
      Metadata:
  
        service_name    : Arabic Radio World Service
  
        service_provider: IRIB
  
    Program 167 
  
      Metadata:
  
        service_name    : RADIO BAHARAN
  
        service_provider: IRIB
  
    Program 169 
  
      Metadata:
  
        service_name    : RADIO TELAVAT
  
        service_provider: IRIB
  
    Program 170 
  
      Metadata:
  
        service_name    : RADIO GOFTEGO
  
        service_provider: IRIB
  
  Successfully opened the file.
  
  Parsing a group of options: output file /var/www/html/ts/1.m3u8.
  
  Applying option acodec (force audio codec ('copy' to copy stream)) with argument copy.
  
  Applying option vcodec (force video codec ('copy' to copy stream)) with argument copy.
  
  Applying option f (force format) with argument hls.
  
  Successfully parsed a group of options.
  
  Opening an output file: /var/www/html/ts/1.m3u8.
  
  Successfully opened the file.
  
  [mpegts @ 0x1967180] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
  
      Last message repeated 1 times
  
  [mpegts @ 0x1967180] muxrate VBR, pcr every 2 pkts, sdt every 200, pat/pmt every 40 pkts
  
  Output #0, hls, to '/var/www/html/ts/1.m3u8':
  
    Metadata:
  
      encoder         : Lavf56.4.101
  
      Stream #0:0, 0, 1/90000: Video: h264 ([27][0][0][0] / 0x001B), yuv420p, 720x576 [SAR 12:11 DAR 15:11], 1/25, q=2-31, 25 fps, 90k tbn, 25 tbc
  
      Stream #0:1(per), 0, 1/90000: Audio: aac_latm ([17][0][0][0] / 0x0011), 48000 Hz, stereo
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [NULL @ 0x199cc60] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [AVIOContext @ 0x19a9860] Statistics: 0 seeks, 896 writeouts=N/A    
  
  [hls @ 0x1a65ca0] EXT-X-MEDIA-SEQUENCE:0
  
  [AVIOContext @ 0x1d162e0] Statistics: 0 seeks, 1 writeouts
  
  [AVIOContext @ 0x1966b40] Statistics: 0 seeks, 27 writeouts
  
  [hls @ 0x1a65ca0] EXT-X-MEDIA-SEQUENCE:0
  
  [AVIOContext @ 0x199b7a0] Statistics: 0 seeks, 1 writeouts
  
  frame=  826 fps= 69 q=-1.0 Lsize=N/A time=00:00:20.63 bitrate=N/A    
  
  video:2611kB audio:68kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Input file #0 (udp://239.1.2.1:60001?fifo_size=50000):
  
    Input stream #0:0 (video): 872 packets read (2779202 bytes); 
  
    Input stream #0:1 (audio): 405 packets read (69222 bytes); 
  
    Total: 1277 packets (2848424 bytes) demuxed
  
  Output file #0 (/var/www/html/ts/1.m3u8):
  
    Output stream #0:0 (video): 826 packets muxed (2673485 bytes); 
  
    Output stream #0:1 (audio): 405 packets muxed (69222 bytes); 
  
    Total: 1231 packets (2742707 bytes) muxed
  
  0 frames successfully decoded, 0 decoding errors
  
  [AVIOContext @ 0x1967ce0] Statistics: 3884832 bytes read, 0 seeks
  
  Received signal 2: terminating.

• Live streaming : node-media-server + Dash.js configured for real-time low latency

  7 juillet 2021, par Maoration

  We're working on an app that enables live monitoring of your back yard.
Each client has a camera connected to the internet, streaming to our public node.js server.

  



  I'm trying to use node-media-server to publish an MPEG-DASH (or HLS) stream to be available for our app clients, on different networks, bandwidths and resolutions around the world.

  



  Our goal is to get as close as possible to live "real-time" so you can monitor what happens in your backyard instantly.

  



  The technical flow already accomplished is :

  



  


  1. ffmpeg process on our server processes the incoming camera stream (separate child process for each camera) and publishes the stream via RTSP on the local machine for node-media-server to use as an 'input' (we are also saving segmented files, generating thumbnails, etc.). the ffmpeg command responsible for that is :

     



     -c:v libx264 -preset ultrafast -tune zerolatency -b:v 900k -f flv rtmp://127.0.0.1:1935/live/office

  


  2. node-media-server is running with what I found as the default configuration for 'live-streaming'

     



     private NMS_CONFIG = {
server: {
  secret: 'thisisnotmyrealsecret',
},
rtmp_server: {
  rtmp: {
    port: 1935,
    chunk_size: 60000,
    gop_cache: false,
    ping: 60,
    ping_timeout: 30,
  },
  http: {
    port: 8888,
    mediaroot: './server/media',
    allow_origin: '*',
  },
  trans: {
    ffmpeg: '/usr/bin/ffmpeg',
    tasks: [
      {
        app: 'live',
        hls: true,
        hlsFlags: '[hls_time=2:hls_list_size=3:hls_flags=delete_segments]',
        dash: true,
        dashFlags: '[f=dash:window_size=3:extra_window_size=5]',
      },
    ],
  },
},


     



     } ;

  


  3. As I understand it, out of the box NMS (node-media-server) publishes the input stream it gets in multiple output formats : flv, mpeg-dash, hls.
with all sorts of online players for these formats I'm able to access and the stream using the url on localhost. with mpeg-dash and hls I'm getting anything between 10-15 seconds of delay, and more.

  


  



  ---

  



  My goal now is to implement a local client-side mpeg-dash player, using dash.js and configure it to be as close as possible to live.

  



  my code for that is :

  



  


  


  &#xD;&#xA;&#xD;&#xA;    &#xD;&#xA;        &#xD;&#xA;        &#xD;&#xA;    &#xD;&#xA;    &#xD;&#xA;        <div>&#xD;&#xA;            <video autoplay="" controls=""></video>&#xD;&#xA;        </div>&#xD;&#xA;        <code class="echappe-js">&lt;script src=&quot;https://cdnjs.cloudflare.com/ajax/libs/dashjs/3.0.2/dash.all.min.js&quot;&gt;&lt;/script&gt;&#xD;&#xA;&#xD;&#xA;        &lt;script&gt;&amp;#xD;&amp;#xA;            (function(){&amp;#xD;&amp;#xA;                // var url = &quot;https://dash.akamaized.net/envivio/EnvivioDash3/manifest.mpd&quot;;&amp;#xD;&amp;#xA;                var url = &quot;http://localhost:8888/live/office/index.mpd&quot;;&amp;#xD;&amp;#xA;                var player = dashjs.MediaPlayer().create();&amp;#xD;&amp;#xA;                &amp;#xD;&amp;#xA;                &amp;#xD;&amp;#xA;&amp;#xD;&amp;#xA;                // config&amp;#xD;&amp;#xA;                targetLatency = 2.0;        // Lowering this value will lower latency but may decrease the player&amp;#x27;s ability to build a stable buffer.&amp;#xD;&amp;#xA;                minDrift = 0.05;            // Minimum latency deviation allowed before activating catch-up mechanism.&amp;#xD;&amp;#xA;                catchupPlaybackRate = 0.5;  // Maximum catch-up rate, as a percentage, for low latency live streams.&amp;#xD;&amp;#xA;                stableBuffer = 2;           // The time that the internal buffer target will be set to post startup/seeks (NOT top quality).&amp;#xD;&amp;#xA;                bufferAtTopQuality = 2;     // The time that the internal buffer target will be set to once playing the top quality.&amp;#xD;&amp;#xA;&amp;#xD;&amp;#xA;&amp;#xD;&amp;#xA;                player.updateSettings({&amp;#xD;&amp;#xA;                    &amp;#x27;streaming&amp;#x27;: {&amp;#xD;&amp;#xA;                        &amp;#x27;liveDelay&amp;#x27;: 2,&amp;#xD;&amp;#xA;                        &amp;#x27;liveCatchUpMinDrift&amp;#x27;: 0.05,&amp;#xD;&amp;#xA;                        &amp;#x27;liveCatchUpPlaybackRate&amp;#x27;: 0.5,&amp;#xD;&amp;#xA;                        &amp;#x27;stableBufferTime&amp;#x27;: 2,&amp;#xD;&amp;#xA;                        &amp;#x27;bufferTimeAtTopQuality&amp;#x27;: 2,&amp;#xD;&amp;#xA;                        &amp;#x27;bufferTimeAtTopQualityLongForm&amp;#x27;: 2,&amp;#xD;&amp;#xA;                        &amp;#x27;bufferToKeep&amp;#x27;: 2,&amp;#xD;&amp;#xA;                        &amp;#x27;bufferAheadToKeep&amp;#x27;: 2,&amp;#xD;&amp;#xA;                        &amp;#x27;lowLatencyEnabled&amp;#x27;: true,&amp;#xD;&amp;#xA;                        &amp;#x27;fastSwitchEnabled&amp;#x27;: true,&amp;#xD;&amp;#xA;                        &amp;#x27;abr&amp;#x27;: {&amp;#xD;&amp;#xA;                            &amp;#x27;limitBitrateByPortal&amp;#x27;: true&amp;#xD;&amp;#xA;                        },&amp;#xD;&amp;#xA;                    }&amp;#xD;&amp;#xA;                });&amp;#xD;&amp;#xA;&amp;#xD;&amp;#xA;                console.log(player.getSettings());&amp;#xD;&amp;#xA;&amp;#xD;&amp;#xA;                setInterval(() =&gt; {&amp;#xD;&amp;#xA;                  console.log(&amp;#x27;Live latency= &amp;#x27;, player.getCurrentLiveLatency());&amp;#xD;&amp;#xA;                  console.log(&amp;#x27;Buffer length= &amp;#x27;, player.getBufferLength(&amp;#x27;video&amp;#x27;));&amp;#xD;&amp;#xA;                }, 3000);&amp;#xD;&amp;#xA;&amp;#xD;&amp;#xA;                player.initialize(document.querySelector(&quot;#videoPlayer&quot;), url, true);&amp;#xD;&amp;#xA;&amp;#xD;&amp;#xA;            })();&amp;#xD;&amp;#xA;&amp;#xD;&amp;#xA;        &lt;/script&gt;&#xD;&#xA;    &#xD;&#xA;

  


  


  




  with the online test video (https://dash.akamaized.net/envivio/EnvivioDash3/manifest.mpd) I see that the live latency value is close to 2 secs (but I have no way to actually confirm it. it's a video file streamed. in my office I have a camera so I can actually compare latency between real-life and the stream I get).
however when working locally with my NMS, it seems this value does not want to go below 20-25 seconds.

  



  Am I doing something wrong ? any configuration on the player (client-side html) I'm forgetting ?
or is there a missing configuration I should add on the server side (NMS) ?

  


• Introducing WebM, an open web media project

  20 mai 2010, par noreply@blogger.com (christosap)

  A key factor in the web’s success is that its core technologies such as HTML, HTTP, TCP/IP, etc. are open and freely implementable. Though video is also now core to the web experience, there is unfortunately no open and free video format that is on par with the leading commercial choices. To that end, we are excited to introduce WebM, a broadly-backed community effort to develop a world-class media format for the open web.

  WebM includes :
  

  • VP8, a high-quality video codec we are releasing today under a BSD-style, royalty-free license
  • Vorbis, an already open source and broadly implemented audio codec
  • a container format based on a subset of the Matroska media container

  The team that created VP8 have been pioneers in video codec development for over a decade. VP8 delivers high quality video while efficiently adapting to the varying processing and bandwidth conditions found on today’s broad range of web-connected devices. VP8’s efficient bandwidth usage will mean lower serving costs for content publishers and high quality video for end-users. The codec’s relative simplicity makes it easy to integrate into existing environments and requires less manual tuning to produce high quality results. These existing attributes and the rapid innovation we expect through the open-development process make VP8 well suited for the unique requirements of video on the web.

  A developer preview of WebM and VP8, including source code, specs, and encoding tools is available today at www.webmproject.org.

  We want to thank the many industry leaders and web community members who are collaborating on the development of WebM and integrating it into their products. Check out what Mozilla, Opera, Google Chrome, Adobe, and many others below have to say about the importance of WebM to the future of web video.

  
  

  AMD

  ARM

  Brightcove

  Broadcom

  Collabora

  Digital Rapids

  Encoding.com

  Grab Networks

  iLinc

  INLET

  Kaltura

  Logitech

  MIPS

  Nvidia

  Ooyala

  Qualcomm

  Skype

  Sorenson

  Telestream
  

  Texas Instruments

  Verisilicon

  ViewCast

  Wildform

  
  

  Posted by Jeremy Doig, Engineering Director of video and Mike Jazayeri, Group Product Manager, Google