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  • Encodage et transformation en formats lisibles sur Internet

    10 avril 2011

    MediaSPIP transforme et ré-encode les documents mis en ligne afin de les rendre lisibles sur Internet et automatiquement utilisables sans intervention du créateur de contenu.
    Les vidéos sont automatiquement encodées dans les formats supportés par HTML5 : MP4, Ogv et WebM. La version "MP4" est également utilisée pour le lecteur flash de secours nécessaire aux anciens navigateurs.
    Les documents audios sont également ré-encodés dans les deux formats utilisables par HTML5 :MP3 et Ogg. La version "MP3" (...)

  • Les tâches Cron régulières de la ferme

    1er décembre 2010, par

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

  • Initialisation de MediaSPIP (préconfiguration)

    20 février 2010, par

    Lors de l’installation de MediaSPIP, celui-ci est préconfiguré pour les usages les plus fréquents.
    Cette préconfiguration est réalisée par un plugin activé par défaut et non désactivable appelé MediaSPIP Init.
    Ce plugin sert à préconfigurer de manière correcte chaque instance de MediaSPIP. Il doit donc être placé dans le dossier plugins-dist/ du site ou de la ferme pour être installé par défaut avant de pouvoir utiliser le site.
    Dans un premier temps il active ou désactive des options de SPIP qui ne le (...)

Sur d’autres sites (6425)

  • Encoding video for real time streaming

    15 septembre 2019, par lilroo

    Miguel Grinberg’s article video streaming with flask, covers sending multiple JPG formatted images to a client through a multipart response to stream video to the browser.

    After doing some reading, I quickly realized that MJPEG is not a real video format, JPEGs are not optimized for video streaming and MJPEG cannot be streamed to a HTML5 video element.

    for my application (a screen sharing application written in python), I need to be able to encode and stream relatively smooth video (smoother than MJPEG anyway) in semi-realtime to the browser.

    I think what I need to do is encode a video stream using a tool like FFmpeg and then send chunks of that output to a browser using a multipart response - however it doesn’t look like there is a way to get FFmpeg (using python bindings) to write to an in-memory buffer.

    Is ffmpeg up to this task ?

    I appreciate that this question may sound nieve, but I would be thankful for being pointed in the right direction.

  • Merge commit ’1c0210c7981b6a61043d9171f506b435ff5a1f5e’

    1er mai 2014, par Michael Niedermayer
    Merge commit ’1c0210c7981b6a61043d9171f506b435ff5a1f5e’

    * commit ’1c0210c7981b6a61043d9171f506b435ff5a1f5e’ :
    
  lavfi : add Bauer stereo-to-binaural audio filter
    

    Conflicts :
    
	Changelog
    
	configure
    
	doc/filters.texi
    
	libavfilter/Makefile
    
	libavfilter/allfilters.c
    
	libavfilter/version.h
    

    Merged-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] Changelog
    • [DH] configure
    • [DH] doc/filters.texi
    • [DH] libavfilter/Makefile
    • [DH] libavfilter/af_bs2b.c
    • [DH] libavfilter/allfilters.c
    • [DH] libavfilter/version.h

  • FFMPEG "Could not allocate memory" Errors through php

    10 décembre 2019, par Applepiee

    I’ve tried to find a solution online for days now but cannot find any solution.

    I just switched server (Intel Xeon to AMD) and since the switch I’ve not been able to get ffmpeg conversions working through the php script. ffmpeg was the exact same version and all php settings are set.

    All commands that the script executes (copied from log files) were tried in shell and executed with no problems.

    The errors look like this :

    [124] =>       handler_name    : Video Media Handler
    
    [125] =>     Stream #8:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 160 kb/s (default)
    
    [126] =>     Metadata:
    
    [127] =>       handler_name    : Sound Media Handler
    
    [128] => Stream mapping:
    
    [129] =>   Stream #0:0 (h264) -> concat:in0:v0
    
    [130] =>   Stream #1:0 (h264) -> concat:in1:v0
    
    [131] =>   Stream #2:0 (h264) -> concat:in2:v0
    
    [132] =>   Stream #3:0 (h264) -> concat:in3:v0
    
    [133] =>   Stream #4:0 (h264) -> concat:in4:v0
    
    [134] =>   Stream #5:0 (h264) -> concat:in5:v0
    
    [135] =>   Stream #6:0 (h264) -> concat:in6:v0
    
    [136] =>   Stream #7:0 (h264) -> concat:in7:v0
    
    [137] =>   scale -> Stream #0:0 (libvpx)
    
    [138] => Press [q] to stop, [?] for help
    
    [139] => [h264 @ 0x34f1dc0] get_buffer() failed
    
    [140] => [h264 @ 0x34f1dc0] thread_get_buffer() failed
    
    [141] => [h264 @ 0x34f1dc0] decode_slice_header error
    
    [142] => [h264 @ 0x34f1dc0] no frame!
    
    [143] => [h264 @ 0x350e680] Error splitting the input into NAL units.
    
    [144] => [h264 @ 0x352af40] Cannot allocate memory.
    
    [145] => [h264 @ 0x352af40] Could not allocate memory
    
    [146] => [h264 @ 0x352af40] h264_slice_header_init() failedError while decoding stream #0:0: Cannot allocate memory
    
    [147] => [h264 @ 0x352af40] Cannot allocate memory.
    
    [148] => [h264 @ 0x352af40] Could not allocate memory
    
    [149] => [h264 @ 0x352af40] h264_slice_header_init() failedError while decoding stream #0:0: Cannot allocate memory
    
    [150] => [h264 @ 0x352af40] Cannot allocate memory.
    
    [151] => [h264 @ 0x352af40] Could not allocate memory
    
    [152] => [h264 @ 0x352af40] h264_slice_header_init() failedError while decoding stream #0:0: Cannot allocate memory
    
    [153] => [h264 @ 0x352af40] Cannot allocate memory.
    
    [154] => [h264 @ 0x352af40] Could not allocate memory
    
    [155] => [h264 @ 0x352af40] h264_slice_header_init() failedError while decoding stream #0:0: Cannot allocate memory
    
    [156] => [h264 @ 0x352af40] Cannot allocate memory.
    
    [157] => [h264 @ 0x352af40] Could not allocate memory
    
...
    
..
    
  [211519] => [h264 @ 0x886a3c0] h264_slice_header_init() failedToo many errors when draining, this is a bug. Stop draining and force EOF.
    
    [211520] => Error while decoding stream #7:0: Internal bug, should not have happened
    
    [211521] => Cannot allocate memory.
    
    [211522] => sws: initFilter failed
    
    [211523] => [Parsed_scale_1 @ 0x8e0be40] Failed to configure output pad on Parsed_scale_1
    
    [211524] => Error reinitializing filters!
    
    [211525] => Error while filtering: Operation not permitted
    
    [211526] => Finishing stream 0:0 without any data written to it.
    
    [211527] => [libvpx @ 0x6f4c600] v1.8.1-301-g89375f031
    
    [211528] => Output #0, webm, to '/home/website/public_html/media/videos/tmb/2420/video_copy.webm':
    
    [211529] =>   Metadata:
    
    [211530] =>     major_brand     : isom
    
    [211531] =>     minor_version   : 512
    
    [211532] =>     compatible_brands: isomiso2avc1mp41
    
    [211533] =>     title           : Aibeya The Animation
    
    [211534] =>     encoder         : Lavf58.35.100
    
    [211535] =>     Chapter #0:0: start 0.000000, end 102.102000
    
    [211536] =>     Metadata:
    
    [211537] =>       title           : Intro
    
    [211538] =>     Chapter #0:1: start 102.102000, end 110.369000
    
    [211539] =>     Metadata:
    
    [211540] =>       title           : Title
    
    [211541] =>     Chapter #0:2: start 110.369000, end 312.179000
    
    [211542] =>     Metadata:
    
    [211543] =>       title           : Part 1
    
    [211544] =>     Chapter #0:3: start 312.179000, end 548.415000
    
    [211545] =>     Metadata:
    
    [211546] =>       title           : Part 2
    
    [211547] =>     Chapter #0:4: start 548.415000, end 706.831000
    
    [211548] =>     Metadata:
    
    [211549] =>       title           : Part 3
    
    [211550] =>     Chapter #0:5: start 706.831000, end 1011.052000
    
    [211551] =>     Metadata:
    
    [211552] =>       title           : Part 4
    
    [211553] =>     Chapter #0:6: start 1011.052000, end 1198.823000
    
    [211554] =>     Metadata:
    
    [211555] =>       title           : Part 5
    
    [211556] =>     Chapter #0:7: start 1198.823000, end 1501.408000
    
    [211557] =>     Metadata:
    
    [211558] =>       title           : Part 6
    
    [211559] =>     Chapter #0:8: start 1501.408000, end 1579.945000
    
    [211560] =>     Metadata:
    
    [211561] =>       title           : Part 7
    
    [211562] =>     Chapter #0:9: start 1579.945000, end 1654.293000
    
    [211563] =>     Metadata:
    
    [211564] =>       title           : Ending
    
    [211565] =>     Stream #0:0: Video: vp8 (libvpx), yuv420p, 400x240 [SAR 837:785 DAR 279:157], q=10-42, 250 kb/s, 23.98 fps, 1k tbn, 23.98 tbc (default)
    
    [211566] =>     Metadata:
    
    [211567] =>       encoder         : Lavc58.64.101 libvpx
    
    [211568] =>     Side data:
    
    [211569] =>       cpb: bitrate max/min/avg: 0/0/0 buffer size: 600000 vbv_delay: N/A
    
    [211570] => frame=    0 fps=0.0 q=0.0 Lsize=       1kB time=00:00:00.00 bitrate=N/A speed=   0x
    
    [211571] => video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
    
    [211572] => Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
    
    [211573] => Conversion failed!
    
)

    Command example used :

    ffmpeg_command is /usr/local/bin/ffmpeg -ss 100 -t 1 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 197 -t 2 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 294 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 391 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 488 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 585 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 682 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 779 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 876 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -filter_complex "[0][1][2][3][4][5][6][7]concat=n=8:v=1:a=0",scale=400:240 -codec:v libx264 -unsharp -b:v 250k -maxrate 250k -bufsize 600k -qmin 10 -qmax 42 -threads 4 -an -y /home/website/public_html/media/videos/tmb/2407/video_copy.mp4

    PHP Info :
    PHP 5.6
    memory_limit 2001M
    max_execution_time 7200
    upload_max_filesize 2000M
    post_max_size 2000M
    max_input_time 7200
    exec is not disabled

    Server info
    CentOS Linux 7 (Core)
    ADVANCE-4 - AMD Epyc 7351P - 128GB DDR4 ECC 2400MHz - 2x HDD SATA 4TB Datacenter Class + 2x SSD NVMe 500GB Enterprise Class Soft RAID

    All help is really appreciated ! Thanks in advance

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