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    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
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    31 janvier 2010, par

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Sur d’autres sites (4654)

  • FFMPEG Incorrect Stream Index Matching with -var_stream_map

    28 décembre 2018, par Hugo

    I am using a bash script to run an FFMPEG command to turn an input file called Awoo.mkv into three HLS playlists each with a different resolution, video and audio bitrate.

    This is the script :

    name=gw
    

    
rm /tmp/hls/*
    

    
./ffmpeg -y \
    
    -stream_loop -1 -re \
    
    -i Awoo.mkv \
    
    -b:v:0 4000k -b:a:0 512k -s:0 1920x1080 -r:0 30 -g:0 90 -preset:0 superfast -tune:0 zerolatency -profile:v:0 high -level:v:0 4 \
    
    -b:v:1 2500k -b:a:1 256k -s:1 1280x720 -r:1 30 -g:1 90 -preset:1 superfast -tune:1 zerolatency -profile:v:1 high -level:v:1 4 \
    
    -b:v:2 800k -b:a:2 255k -s:2 960x540 -r:2 30 -g:2 90 -preset:2 superfast -tune:2 zerolatency -profile:v:2 high -level:v:2 4 \
    
    -hls_time 6 \
    
    -hls_list_size 2 \
    
    -hls_flags delete_segments \
    
    -map 0:v -map 0:a -map 0:v -map 0:a -map 0:v -map 0:a \
    
    -var_stream_map "v:0,a:0 v:1,a:1 v:2,a:2" \
    
    -f hls -master_pl_name "${name}.m3u8" \
    
    -hls_segment_filename "/tmp/hls/${name}_-%d-%v.ts" \
    
    "/tmp/hls/${name}_%v.m3u8"

    This almost works great, but the output is slightly off...

    If you look at these two lines :

    -b:v:1 2500k -b:a:1 256k -s:1 1280x720 -r:1 30 -g:1 90 -preset:1 superfast -tune:1 zerolatency -profile:v:1 high -level:v:1 4 \
    
-b:v:2 800k -b:a:2 255k -s:2 960x540 -r:2 30 -g:2 90 -preset:2 superfast -tune:2 zerolatency -profile:v:2 high -level:v:2 4 \

    A resolution of 1280x720 should have a bitrate of 2500k, a resolution of 960x540 should have a bitrate of 800k.

    This is the relevant output from FFMPEG :

    Stream #0:2(und): Video: h264 (libx264), yuv420p(progressive), 960x540 [SAR 1:1 DAR 16:9], q=-1--1, 2500 kb/s, 30 fps, 90k tbn, 30 tbc (default)
    
Metadata:
    
  CREATION_TIME   : 2017-01-27 05:02:53
    
  LANGUAGE        : und
    
  HANDLER_NAME    : VideoHandler
    
  DURATION        : 00:02:24.310000000
    
  encoder         : Lavc58.18.100 libx264
    
Side data:
    
  cpb: bitrate max/min/avg: 0/0/2500000 buffer size: 0 vbv_delay: -1
    
Stream #0:3(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 256 kb/s (default)
    
Metadata:
    
  LANGUAGE        : eng
    
  DURATION        : 00:02:24.348000000
    
  encoder         : Lavc58.18.100 aac
    
Stream #0:4(und): Video: h264 (libx264), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 800 kb/s, 29 fps, 90k tbn, 29 tbc (default)
    
Metadata:
    
  CREATION_TIME   : 2017-01-27 05:02:53
    
  LANGUAGE        : und
    
  HANDLER_NAME    : VideoHandler
    
  DURATION        : 00:02:24.310000000
    
  encoder         : Lavc58.18.100 libx264
    
Side data:
    
  cpb: bitrate max/min/avg: 0/0/800000 buffer size: 0 vbv_delay: -1
    
Stream #0:5(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 255 kb/s (default)
    
Metadata:
    
  LANGUAGE        : eng
    
  DURATION        : 00:02:24.348000000
    
  encoder         : Lavc58.18.100 aac

    Stream #0:2 is given the wrong resolution of 960x540, and therefore also the wrong bitrate of 2500. This should be the resolution of 1280x720, but this is below matched with the bitrate of 800.

    From what I know, the resolutions are showing in the wrong order, if 720 was first and 540 after then everything would match up fine. I’m not sure what’s causing this, I am new to the -var_stream_map.

    If it is relevant, the entire output from FFMPEG is below :

    ffmpeg version 4.0.3-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
    
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg
    
  libavutil      56. 14.100 / 56. 14.100
    
  libavcodec     58. 18.100 / 58. 18.100
    
  libavformat    58. 12.100 / 58. 12.100
    
  libavdevice    58.  3.100 / 58.  3.100
    
  libavfilter     7. 16.100 /  7. 16.100
    
  libswscale      5.  1.100 /  5.  1.100
    
  libswresample   3.  1.100 /  3.  1.100
    
  libpostproc    55.  1.100 / 55.  1.100
    
Input #0, matroska,webm, from 'Awoo.mkv':
    
  Metadata:
    
    COMPATIBLE_BRANDS: iso6avc1mp41
    
    MAJOR_BRAND     : dash
    
    MINOR_VERSION   : 0
    
    ENCODER         : Lavf56.40.101
    
  Duration: 00:02:24.35, start: 0.000000, bitrate: 1114 kb/s
    
    Stream #0:0(und): Video: h264 (Main), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 29 fps, 29 tbr, 1k tbn, 58 tbc (default)
    
    Metadata:
    
      CREATION_TIME   : 2017-01-27 05:02:53
    
      LANGUAGE        : und
    
      HANDLER_NAME    : VideoHandler
    
      DURATION        : 00:02:24.310000000
    
    Stream #0:1(eng): Audio: vorbis, 44100 Hz, stereo, fltp (default)
    
    Metadata:
    
      LANGUAGE        : eng
    
      DURATION        : 00:02:24.348000000
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:1 (vorbis (native) -> aac (native))
    
  Stream #0:0 -> #0:2 (h264 (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:3 (vorbis (native) -> aac (native))
    
  Stream #0:0 -> #0:4 (h264 (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:5 (vorbis (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x664d1c0] using SAR=1/1
    
[libx264 @ 0x664d1c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    
[libx264 @ 0x664d1c0] profile High, level 4.0, 4:2:0, 8-bit
    
[libx264 @ 0x664d1c0] 264 - core 157 r2935 545de2f - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x3 me=dia subme=1 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=4 lookahead_threads=4 sliced_threads=1 slices=4 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=1 keyint=90 keyint_min=9 scenecut=40 intra_refresh=0 rc=abr mbtree=0 bitrate=4000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
[libx264 @ 0x664f080] using SAR=1/1
    
[libx264 @ 0x664f080] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    
[libx264 @ 0x664f080] profile High, level 4.0, 4:2:0, 8-bit
    
[libx264 @ 0x664f080] 264 - core 157 r2935 545de2f - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x3 me=dia subme=1 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=4 lookahead_threads=4 sliced_threads=1 slices=4 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=1 keyint=90 keyint_min=9 scenecut=40 intra_refresh=0 rc=abr mbtree=0 bitrate=2500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
[libx264 @ 0x6680b80] using SAR=1/1
    
[libx264 @ 0x6680b80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    
[libx264 @ 0x6680b80] profile High, level 4.0, 4:2:0, 8-bit
    
[libx264 @ 0x6680b80] 264 - core 157 r2935 545de2f - 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=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 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=800 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
[hls @ 0x6650000] Opening '/tmp/hls/gw_-0-0.ts' for writing
    
[hls @ 0x6650000] Opening '/tmp/hls/gw_-0-1.ts' for writing
    
[hls @ 0x6650000] Opening '/tmp/hls/gw_-0-2.ts' for writing
    
Output #0, hls, to '/tmp/hls/gw_%v.m3u8':
    
  Metadata:
    
    COMPATIBLE_BRANDS: iso6avc1mp41
    
    MAJOR_BRAND     : dash
    
    MINOR_VERSION   : 0
    
    encoder         : Lavf58.12.100
    
    Stream #0:0(und): Video: h264 (libx264), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 4000 kb/s, 30 fps, 90k tbn, 30 tbc (default)
    
    Metadata:
    
      CREATION_TIME   : 2017-01-27 05:02:53
    
      LANGUAGE        : und
    
      HANDLER_NAME    : VideoHandler
    
      DURATION        : 00:02:24.310000000
    
      encoder         : Lavc58.18.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/4000000 buffer size: 0 vbv_delay: -1
    
    Stream #0:1(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 512 kb/s (default)
    
    Metadata:
    
      LANGUAGE        : eng
    
      DURATION        : 00:02:24.348000000
    
      encoder         : Lavc58.18.100 aac
    
    Stream #0:2(und): Video: h264 (libx264), yuv420p(progressive), 960x540 [SAR 1:1 DAR 16:9], q=-1--1, 2500 kb/s, 30 fps, 90k tbn, 30 tbc (default)
    
    Metadata:
    
      CREATION_TIME   : 2017-01-27 05:02:53
    
      LANGUAGE        : und
    
      HANDLER_NAME    : VideoHandler
    
      DURATION        : 00:02:24.310000000
    
      encoder         : Lavc58.18.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/2500000 buffer size: 0 vbv_delay: -1
    
    Stream #0:3(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 256 kb/s (default)
    
    Metadata:
    
      LANGUAGE        : eng
    
      DURATION        : 00:02:24.348000000
    
      encoder         : Lavc58.18.100 aac
    
    Stream #0:4(und): Video: h264 (libx264), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 800 kb/s, 29 fps, 90k tbn, 29 tbc (default)
    
    Metadata:
    
      CREATION_TIME   : 2017-01-27 05:02:53
    
      LANGUAGE        : und
    
      HANDLER_NAME    : VideoHandler
    
      DURATION        : 00:02:24.310000000
    
      encoder         : Lavc58.18.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/800000 buffer size: 0 vbv_delay: -1
    
    Stream #0:5(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 255 kb/s (default)
    
    Metadata:
    
      LANGUAGE        : eng
    
      DURATION        : 00:02:24.348000000
    
      encoder         : Lavc58.18.100 aac
    
[hls @ 0x6650000] Opening '/tmp/hls/gw_0.m3u8.tmp' for writing6.50 bitrate=N/A dup=12 drop=0 speed=0.965x    
    
[hls @ 0x6650000] Opening '/tmp/hls/gw_1.m3u8.tmp' for writing
    
[hls @ 0x6650000] Opening '/tmp/hls/gw_2.m3u8.tmp' for writing
    
[hls @ 0x6650000] Opening '/tmp/hls/gw.m3u8' for writing

  • aarch64 : vp8 : Fix assembling with armasm64

    31 janvier 2019, par Martin Storsjö
    aarch64 : vp8 : Fix assembling with armasm64

    Signed-off-by : Martin Storsjö <martin@martin.st>
    
(cherry picked from commit 2eeac79936e83c4495cbe5905064ab797e9b45ff)
    • [DH] libavcodec/aarch64/vp8dsp_neon.S

  • vaapi : Implement device-only setup

    11 février 2017, par Mark Thompson
    vaapi : Implement device-only setup

    In this case, the user only supplies a device and the frame context
    
is allocated internally by lavc.
    

    (cherry picked from commit 5dd9a4b88b287bf8c93520afda7becb1ad0d1894)
    • [DH] libavcodec/vaapi_decode.c
    • [DH] libavcodec/vaapi_decode.h
    • [DH] libavcodec/version.h

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