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Autres articles (49)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Personnaliser les catégories

    21 juin 2013, par

    Formulaire de création d’une catégorie
    Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
    Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire.
    Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
    Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...)

Sur d’autres sites (7071)

  • Revision 29746 : Gestion de la file d’attente

    8 juillet 2009, par kent1@… — Log

    Gestion de la file d’attente

  • lavc : use a separate field for exporting audio encoder padding

    23 août 2014, par Anton Khirnov
    lavc : use a separate field for exporting audio encoder padding

    Currently, the amount of padding inserted at the beginning by some audio
    
encoders, is exported through AVCodecContext.delay. However

    - the term ’delay’ is heavily overloaded and can have multiple different
    
  meanings even in the case of audio encoding.

    - this field has entirely different meanings, depending on whether the
    
  codec context is used for encoding or decoding (and has yet another
    
  different meaning for video), preventing generic handling of the codec
    
  context.
    

    Therefore, add a new field — AVCodecContext.initial_padding. It could
    
conceivably be used for decoding as well at a later point.
    • [DH] doc/APIchanges
    • [DH] libavcodec/aacenc.c
    • [DH] libavcodec/ac3enc.c
    • [DH] libavcodec/audio_frame_queue.c
    • [DH] libavcodec/avcodec.h
    • [DH] libavcodec/g722enc.c
    • [DH] libavcodec/libfaac.c
    • [DH] libavcodec/libfdk-aacenc.c
    • [DH] libavcodec/libmp3lame.c
    • [DH] libavcodec/libopencore-amr.c
    • [DH] libavcodec/libopusenc.c
    • [DH] libavcodec/libspeexenc.c
    • [DH] libavcodec/libtwolame.c
    • [DH] libavcodec/libvo-aacenc.c
    • [DH] libavcodec/libvo-amrwbenc.c
    • [DH] libavcodec/libvorbis.c
    • [DH] libavcodec/mpegaudioenc.c
    • [DH] libavcodec/nellymoserenc.c
    • [DH] libavcodec/ra144enc.c
    • [DH] libavcodec/utils.c
    • [DH] libavcodec/version.h
    • [DH] libavcodec/wmaenc.c

  • Transcode each stream in a different thread with ffmpeg

    30 mai 2018, par hedgar2017

    Is there a way of forcing ffmpeg to encode each audio stream in a different thread ?

    ffmpeg
    
    -i audio1.ac3 -c:a libopus
    
    -i audio2.ac3 -c:a libopus
    
    -i audio3.ac3 -c:a libopus
    
    output.mkv

    I mean only ffmpeg’s own instruments, without multiple processes and other OS features.

    Normally, there is only one core saturated, so encoding a file with many audio streams is very long.

    Exact command :

    ffmpeg -loglevel verbose
    
    -i 'Ярость (Fury).mkv'
    
    -i 'Fury (2014) [Ukr & Eng, Sub Eng] BDRip-AVC [Hurtom & HELLYWOOD].mkv'
    
    -threads 0 -max_muxing_queue_size 65536 -avoid_negative_ts 1 -metadata title=2014.Fury.BDRip.HEVC.1080p
    
    -map 0:0 -c:v copy -metadata:s:v:0 title=2014.Fury.BDRip.HEVC.1080p -disposition:v:0 +defaug-[forced
    
    -map 0:2 -c:a libopus -application audio -vbr on -packet_loss 0 -frame_duration 20 -mapping_family 255 -compression_level 10 -metadata:s:a:0 language=eng -metadata:s:a:0 title=Original -disposition:a:0 +defaug-[forced
    
    -map 1:1 -c:a libopus -application audio -vbr on -packet_loss 0 -frame_duration 20 -mapping_family 255 -compression_level 10 -metadata:s:a:1 language=ukr -disposition:a:1 -default-forced
    
    -map 0:1 -c:a libopus -application audio -vbr on -packet_loss 0 -frame_duration 20 -mapping_family 255 -compression_level 10 -metadata:s:a:2 language=rus -metadata:s:a:2 title=Dub -disposition:a:2 -default-forced
    
    -map 0:10 -c:s copy -metadata:s:s:0 language=eng -metadata:s:s:0 title=Original -disposition:s:0 -default-forced
    
    -f matroska ./2014.Fury.BDRip.HEVC.1080p.mkv

    Log :

    ... inputs ...
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:2 -> #0:1 (dts (dca) -> opus (libopus))
    
  Stream #1:1 -> #0:2 (ac3 (native) -> opus (libopus))
    
  Stream #0:1 -> #0:3 (ac3 (native) -> opus (libopus))
    
  Stream #0:10 -> #0:4 (copy)
    
Press [q] to stop, [?] for help
    
[graph_2_in_0_1 @ 0000019ca2cb29c0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x60f
    
[format_out_0_3 @ 0000019ca2cb20c0] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_3'
    
[auto_resampler_0 @ 0000019ca2cb27c0] ch:6 chl:5.1(side) fmt:fltp r:48000Hz -> ch:6 chl:5.1(side) fmt:flt r:48000Hz
    
[libopus @ 0000019ca2c9f3c0] No bit rate set. Defaulting to 384000 bps.
    
[graph_0_in_0_2 @ 0000019ca2cb1ac0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x60f
    
[format_out_0_1 @ 0000019ca2cb1bc0] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_1'
    
[auto_resampler_0 @ 0000019ca2cb14c0] ch:6 chl:5.1(side) fmt:fltp r:48000Hz -> ch:6 chl:5.1(side) fmt:flt r:48000Hz
    
[libopus @ 0000019ca292c980] No bit rate set. Defaulting to 384000 bps.
    
[graph_1_in_1_1 @ 0000019ca2cb2bc0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x60f
    
[format_out_0_2 @ 0000019ca2cb26c0] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_2'
    
[auto_resampler_0 @ 0000019ca2cb0dc0] ch:6 chl:5.1(side) fmt:fltp r:48000Hz -> ch:6 chl:5.1(side) fmt:flt r:48000Hz
    
[libopus @ 0000019ca292e980] No bit rate set. Defaulting to 384000 bps.
    
Output #0, matroska, to './2014.Fury.BDRip.HEVC.1080p.mkv':
    
  Metadata:
    
    DATE_RELEASED   : 2014
    
    title           : 2014.Fury.BDRip.HEVC.1080p
    
    Released by     : Buba5473 for NNM-Club
    
    Copyright       : Encoded by Goor80
    
    encoder         : Lavf58.12.100
    
    Chapter #0:0: start 0.000000, end 478.228000
    
    Metadata:
    
      title           : Chapter 01
    
    ... chapters ...
    
    Stream #0:0: Video: hevc (Main 10), 1 reference frame, yuv420p10le(tv), 1920x800 (0x0) [SAR 1:1 DAR 12:5], q=2-31, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc (default)
    
    Stream #0:1(eng): Audio: opus (libopus) ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, 5.1(side), flt, delay 312, 384 kb/s (default)
    
    Stream #0:2(ukr): Audio: opus (libopus) ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, 5.1(side), flt, delay 312, 384 kb/s
    
    Stream #0:3(rus): Audio: opus (libopus) ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, 5.1(side), flt, delay 312, 384 kb/s
    
    Stream #0:4(eng): Subtitle: subrip
    
[matroska @ 0000019ca2d17f00] Starting new cluster due to timestamp=6175.5kbits/s speed=10.2x
    
[matroska @ 0000019ca2d17f00] Starting new cluster due to timestamp=7530.8kbits/s speed=8.74x
    
[matroska @ 0000019ca2d17f00] Starting new cluster due to timestamp=7955.1kbits/s speed=9.02x
    
frame=156607 fps=205 q=-1.0 size= 8321971kB time=01:48:51.85 bitrate=10437.1kbits/s speed=8.55x
    
... not finished yet ...

    fps is always around 3000/number_of_audio_channels, meaning all audio transcoding is done with the only thread.

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