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Médias (91)

Autres articles (96)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Amélioration de la version de base

    13 septembre 2013

    Jolie sélection multiple
    Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
    Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...)

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

Sur d’autres sites (16685)

  • syncing a video file with audio using ffmpeg is returning a video without audio

    31 juillet 2019, par abbood

    When I attempt to sync a .mov video with an .m4a audio file using ffmpeg like so

    ffmpeg -ss 00:00:2 -i test.m4a  -i test.mov -c:v copy -c:a aac -strict experimental output.mp4

    it works like a charm. But right now I’ve recorded a usability test video using adobe XD, and it returned an .mp4 (MPEG-4) video and I manually recorded the audio using quicktimre returning a .m4a audio file.

    Trying to merge them using ffmpeg is returning a video without any audio :

    ffmpeg -i video.mp4  -i audio.m4a -c:v copy -c:a aac -strict experimental output.mp4
    ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
     built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
     configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1_1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gpl --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-opencl --enable-videotoolbox
     libavutil      56. 22.100 / 56. 22.100
     libavcodec     58. 35.100 / 58. 35.100
     libavformat    58. 20.100 / 58. 20.100
     libavdevice    58.  5.100 / 58.  5.100
     libavfilter     7. 40.101 /  7. 40.101
     libavresample   4.  0.  0 /  4.  0.  0
     libswscale      5.  3.100 /  5.  3.100
     libswresample   3.  3.100 /  3.  3.100
     libpostproc    55.  3.100 / 55.  3.100
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
     Metadata:
       major_brand     : qt
       minor_version   : 0
       compatible_brands: qt
       creation_time   : 2019-07-31T14:43:18.000000Z
       com.apple.quicktime.make: Apple
       com.apple.quicktime.model: MacBookPro15,1
       com.apple.quicktime.software: Mac OS X 10.14.5 (18F203)
       com.apple.quicktime.creationdate: 2019-07-31T17:43:17+0300
     Duration: 00:03:46.05, start: 0.000000, bitrate: 498 kb/s
       Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 374x812 [SAR 1:1 DAR 187:406], 390 kb/s, 60 fps, 60 tbr, 6k tbn, 12k tbc (default)
       Metadata:
         creation_time   : 2019-07-31T14:43:18.000000Z
         handler_name    : Core Media Video
         encoder         : H.264
       Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 8000 Hz, stereo, fltp, 0 kb/s (default)
       Metadata:
         creation_time   : 2019-07-31T14:43:18.000000Z
         handler_name    : Core Media Audio
    Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'audio.m4a':
     Metadata:
       major_brand     : M4A
       minor_version   : 0
       compatible_brands: M4A mp42isom
       creation_time   : 2019-07-31T14:47:26.000000Z
       iTunSMPB        :  00000000 00000840 00000000 00000000009DFBC0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
     Duration: 00:03:54.78, start: 0.047891, bitrate: 225 kb/s
       Stream #1:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 224 kb/s (default)
       Metadata:
         creation_time   : 2019-07-31T14:47:26.000000Z
         handler_name    : Core Media Audio
    Stream mapping:
     Stream #0:0 -> #0:0 (copy)
     Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    Press [q] to stop, [?] for help
    [aac @ 0x7fb5a4806a00] Too many bits 16384.000000 > 12288 per frame requested, clamping to max
    Output #0, mp4, to 'output.mp4':
     Metadata:
       major_brand     : qt
       minor_version   : 0
       compatible_brands: qt
       com.apple.quicktime.creationdate: 2019-07-31T17:43:17+0300
       com.apple.quicktime.make: Apple
       com.apple.quicktime.model: MacBookPro15,1
       com.apple.quicktime.software: Mac OS X 10.14.5 (18F203)
       encoder         : Lavf58.20.100
       Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 374x812 [SAR 1:1 DAR 187:406], q=2-31, 390 kb/s, 60 fps, 60 tbr, 12k tbn, 6k tbc (default)
       Metadata:
         creation_time   : 2019-07-31T14:43:18.000000Z
         handler_name    : Core Media Video
         encoder         : H.264
       Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 8000 Hz, stereo, fltp, 96 kb/s (default)
       Metadata:
         creation_time   : 2019-07-31T14:43:18.000000Z
         handler_name    : Core Media Audio
         encoder         : Lavc58.35.100 aac
    frame=13563 fps=0.0 q=-1.0 Lsize=   10903kB time=00:03:46.08 bitrate= 395.1kbits/s speed= 916x
    video:10699kB audio:10kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.805767%

    How can I get around this limitation ?

  • lavf/hls : Cleanup the applehttp

    12 avril 2019, par Jun Zhao
    lavf/hls : Cleanup the applehttp
    

    Cleanup the applehttp as demuxer name, when use the command :

    ffmpeg -formats, get the confused information like :
    "
    E hls Apple HTTP Live Streaming
    D hls,applehttp Apple HTTP Live Streaming
    "
    we don't use applehttp as the demuxer/muxer name usually, so
    cleanup the applehttp and update the documents.

    After the change, get the information from "ffmpeg -formats" :
    "
    DE hls Apple HTTP Live Streaming
    "

    Reviewed-by : Steven Liu <lq@onvideo.cn>
    Signed-off-by : Jun Zhao <barryjzhao@tencent.com>

    • [DH] doc/demuxers.texi
    • [DH] libavformat/hls.c
  • HEVC with Alpha Encoding on Windows

    14 juillet 2023, par CodeVortex

    I know, this question has been asked before, but most of the answers to them are very old.

    &#xA;

    Actually, I am developing a website which uses transparent videos. So, I am using .webm format for them. However, as you know it is not possible to run .webm with transparency on Apple products. So, after researching on internet(stackoverflow etc), I found a solution that I should convert my video into a series of PNGs and then convert them into HEVC with alpha channel. However, according to the research I done, only the Apple hardware can properly encode HEVC with alpha channel.

    &#xA;

    I am a newbie to these codecs and formats stuff. So, I think that I read somewhere that latest versions of FFMPEG can also encode HEVC with alpha. However, being a noob I can't figure out any way to write a command for this purpose. Being a beginner with almost non-existent skills in this field of expertise, it is nearly impossible for me to understand the documentations correctly. I also tried using shutterencoder and some other tools but failed.

    &#xA;

    Although, there is a quicktime .mov solution but with that the file size becomes too large for my 10 sec video, almost 334 mb and as you know this size is too large for a animation video on a landing-page style basic website.

    &#xA;

    So, now my question is there any way to properly encode HEVC with alpha on Windows or Linux to maintain transparency ?

    &#xA;

    If this is not possible, then is there any other way to create such transparent videos on Windows or Linux which can be played on browsers of Apple devices ?

    &#xA;

    I am stuck on this for 3 days, So, any type of help is greatly regarded. I am also providing the link to my videos, if someone wants to take a closer look on codes and formats of these videos : Videos Link

    &#xA;

    P.S : if anyone with a mac device can encode these transparent videos for me, then that would be best and I shall be very grateful to you

    &#xA;