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• How to calculate byte/index ranges for mpeg-dash MPD file ?

  7 avril 2016, par TheSHEEEP

  I basically know how an .mpd file would have to be structured to support streaming from separate .mp4 (or webm) files.

  However, I would like to implement the "static" (aka "on-demand") method, thus only having one file per quality that I want to offer in the stream.

  In all samples, this is done by supplying the indexRange & range values within a Representation like this :

  <representation bandwidth="2073921" codecs="avc1.4d401f" height="720" mimetype="video/mp4" width="1280">
  
          <baseurl>car-20120827-88.mp4</baseurl>
  
          <segmentbase indexrange="708-1183">
  
            <initialization range="0-707"></initialization>
  
          </segmentbase>
  
  </representation>

  What I could not find out anywhere is how one would calculate the indexRange/range values here, using only ffmpeg (or ffprobe).
  What exactly would one have to do to get those numbers right for arbitrary (yet supported, of course) video files to create the .mpd file for them ?

  Or am I trying to figure out something in vain here and those values are just arbitrary ?

• ffmpeg not returning anything on Dash

  10 janvier 2021, par whatcrisis

  I am trying to extract subtitles from an MPD, but ffmpeg is not returning anything. If I try first a simple command such as :

  


  ffmpeg -i Downloads\Manifest.mpd


  


  After just 2 seconds it stops. This is the log :

  


  ffmpeg version 4.3.1-2021-01-01-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10.2.0 (Rev5, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100


  


  So basically, it did nothing. I have libxml2 installed and I am confused since there is no error at all. Any help ? Thank you !

  


• FFMPEG php HLS and DASH conversion

  21 juillet 2020, par Angus Simons

  I'm using this repo https://github.com/aminyazdanpanah/PHP-FFmpeg-video-streaming to encode video in hls and then reproduce on the front end.

  


  After creating all the hls segments correctly the php script fail to execute the command below.
The command getting error is the next one :

  


  '/usr/bin/ffmpeg' '-y' '-i' 'source.mp4' '-c:v' 'libx264' '-c:a' 'aac' '-bf' '1' '-keyint_min' '25' '-g' '250' '-sc_threshold' '40' '-use_timeline' '1' '-use_template' '1' '-init_seg_name' 'dash_init_$RepresentationID$.$ext$' '-media_seg_name' 'dash_chunk_$RepresentationID$_$Number%05d$.$ext$' '-seg_duration' '10' '-hls_playlist' '0' '-f' 'dash' '-adaptation_sets' 'id=0,streams=v id=1,streams=a' '-map' '0' '-s:v:0' '256x144' '-b:v:0' '830k' '-map' '0' '-s:v:1' '426x240' '-b:v:1' '969k' '-map' '0' '-s:v:2' '640x360' '-b:v:2' '1162k' '-map' '0' '-s:v:3' '854x480' '-b:v:3' '1453k' '-map' '0' '-s:v:4' '1280x720' '-b:v:4' '1938k' '-map' '0' '-s:v:5' '1920x1080' '-b:v:5' '2907k' '-strict' '-2' '-threads' '12' 'dash.mpd'


  


  Here there is the error printed executing the command with CLI :

  


      ffmpeg version 4.3-2~16.04.york1 Copyright (c) 2000-2020 the FFmpeg developers
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.12) 20160609
    configuration: --prefix=/usr --extra-version='2~16.04.york1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
    libavutil      56. 51.100 / 56. 51.100
    libavcodec     58. 91.100 / 58. 91.100
    libavformat    58. 45.100 / 58. 45.100
    libavdevice    58. 10.100 / 58. 10.100
    libavfilter     7. 85.100 /  7. 85.100
    libavresample   4.  0.  0 /  4.  0.  0
    libswscale      5.  7.100 /  5.  7.100
    libswresample   3.  7.100 /  3.  7.100
    libpostproc    55.  7.100 / 55.  7.100
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'source.mp4':
    Metadata:
        major_brand     : mp42
        minor_version   : 0
        compatible_brands: mp42mp41
        creation_time   : 2020-07-10T09:13:47.000000Z
    Duration: 01:03:27.36, start: 0.000000, bitrate: 3298 kb/s
        Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 2977 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
        Metadata:
        creation_time   : 2020-07-10T09:13:47.000000Z
        handler_name    : ?Mainconcept Video Media Handler
        encoder         : AVC Coding
        Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
        Metadata:
        creation_time   : 2020-07-10T09:13:48.000000Z
        handler_name    : #Mainconcept MP4 Sound Media Handler
    Stream mapping:
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    Stream #0:0 -> #0:2 (h264 (native) -> h264 (libx264))
    Stream #0:1 -> #0:3 (aac (native) -> aac (native))
    Stream #0:0 -> #0:4 (h264 (native) -> h264 (libx264))
    Stream #0:1 -> #0:5 (aac (native) -> aac (native))
    Stream #0:0 -> #0:6 (h264 (native) -> h264 (libx264))
    Stream #0:1 -> #0:7 (aac (native) -> aac (native))
    Stream #0:0 -> #0:8 (h264 (native) -> h264 (libx264))
    Stream #0:1 -> #0:9 (aac (native) -> aac (native))
    Stream #0:0 -> #0:10 (h264 (native) -> h264 (libx264))
    Stream #0:1 -> #0:11 (aac (native) -> aac (native))
    Press [q] to stop, [?] for help
    [libx264 @ 0x55de2d5e6c80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    [libx264 @ 0x55de2d5e6c80] profile High, level 2.0
    [libx264 @ 0x55de2d5e6c80] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=1 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=830 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    [libx264 @ 0x55de2d09fcc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    [libx264 @ 0x55de2d09fcc0] profile High, level 2.1
    [libx264 @ 0x55de2d09fcc0] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=1 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=969 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    [libx264 @ 0x55de2d0a4240] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    [libx264 @ 0x55de2d0a4240] profile High, level 3.0
    [libx264 @ 0x55de2d0a4240] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=1 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=1162 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    [libx264 @ 0x55de2d0a8380] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    [libx264 @ 0x55de2d0a8380] profile High, level 3.0
    [libx264 @ 0x55de2d0a8380] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=1 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=1453 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    [libx264 @ 0x55de2d085c80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    [libx264 @ 0x55de2d085c80] profile High, level 3.1
    [libx264 @ 0x55de2d085c80] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=1 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=1938 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    [libx264 @ 0x55de2d089d40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    [libx264 @ 0x55de2d089d40] profile High, level 4.0
    [libx264 @ 0x55de2d089d40] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=1 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=2907 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    [dash @ 0x55de2cf50900] Opening 'dash_init_0.m4s' for writing
    [dash @ 0x55de2cf50900] Opening 'dash_init_1.m4s' for writing
    [dash @ 0x55de2cf50900] Opening 'dash_init_2.m4s' for writing
    [dash @ 0x55de2cf50900] Conflicting stream par values in Adaptation Set 1
    Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
    Error initializing output stream 0:10 -- 
    [libx264 @ 0x55de2d5e6c80] final ratefactor: 16.04
    [aac @ 0x55de2d09eb80] Qavg: 65536.000
    [aac @ 0x55de2d09eb80] 2 frames left in the queue on closing
    [libx264 @ 0x55de2d09fcc0] final ratefactor: 19.18
    [aac @ 0x55de2d0a2b00] Qavg: 65536.000
    [aac @ 0x55de2d0a2b00] 2 frames left in the queue on closing
    [libx264 @ 0x55de2d0a4240] final ratefactor: 21.16
    [aac @ 0x55de2d0a6c40] Qavg: 65536.000
    [aac @ 0x55de2d0a6c40] 2 frames left in the queue on closing
    [libx264 @ 0x55de2d0a8380] final ratefactor: 21.67
    [aac @ 0x55de2d084540] Qavg: 65536.000
    [aac @ 0x55de2d084540] 2 frames left in the queue on closing
    [libx264 @ 0x55de2d085c80] final ratefactor: 22.63
    [aac @ 0x55de2d088600] Qavg: 65536.000
    [aac @ 0x55de2d088600] 2 frames left in the queue on closing
    [libx264 @ 0x55de2d089d40] final ratefactor: 22.67
    [aac @ 0x55de2d08c5c0] Qavg: 65536.000
    [aac @ 0x55de2d08c5c0] 2 frames left in the queue on closing
    Conversion failed!


  


  I checked if I have MPEG DASH support enable and it is enabled in FFMPEG