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  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

  • Dépôt de média et thèmes par FTP

    31 mai 2013, par

    L’outil MédiaSPIP traite aussi les média transférés par la voie FTP. Si vous préférez déposer par cette voie, récupérez les identifiants d’accès vers votre site MédiaSPIP et utilisez votre client FTP favori.
    Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...)

Sur d’autres sites (9406)

  • Converting HLS video with fmp4 segments to image thumbnails via ffmpeg with start offset using fast seek

    19 octobre 2022, par hellerahum

    I'm having trouble with what I think should be a basic use case for ffmpeg. What I'd like to do is take an hls video in fmp4 and output 30s of images at 10fps, using "fast seek" to start at an offset well into the video. This works with an Apple sample using ts segments, but not with fmp4 segments.

    


    working sample (ts)

    


    ffmpeg -ss 00:00:05 -i https://devimages.apple.com.edgekey.net/iphone/samples/bipbop/bipbopall.m3u8 -t 30 -vf fps=10 hls_samples/img%03d.jpg


    


    broken sample (fmp4)

    


    ffmpeg -ss 00:00:05 -i https://devstreaming-cdn.apple.com/videos/streaming/examples/img_bipbop_adv_example_fmp4/master.m3u8 -t 30 -vf fps=10 hls_samples/img%03d.jpg


    


    The broken sample spits out errors like :

    


    [NULL @ 0x123e30d20] Invalid NAL unit size (-2003396084 > 1673).
[NULL @ 0x123e30d20] missing picture in access unit with size 1677


    


    and then finally :

    


    Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
Conversion failed!


    


    When I re-encode the fmp4 video adding keyframes via -g 1 (still hls with fmp4) I'm then able to use the fast seek -ss flag before the -i , but i'd rather not do this in a 2-step process, and ideally would take the original hls/fmp4 manifest and output the thumbnails directly. Both samples work with the -ss flag after the input (slow seek) but I have some long (10+ hour) videos so that's not tenable. Anyone able to point me to what I'm doing wrong, or is it possible this is an issue with ffmpeg and its support for fmp4 ? I'm using ffmpeg v5.1.2 and have checked on both an M1 mac and Ubuntu system.

    


  • FFMPEG : i need audio channels 7 & 8 to be the main audio track for a video

    10 avril 2013, par lo_fye

    I have a video with 8 channels of audio.

    I need tracks 7 (Left Stereo) and 8 (Right Stereo) to be the audio for the video (which I'm converting to flv).

    I've tried playing with -filter_complex and the join, amix, and amerge filters, as well as the -map parameter, but I can't seem to find the right combination of values :-/

    Output :

    /usr/local/bin/ffmpeg-1.0/bin/ffmpeg -i '/folder/video_name.mov' -f 'flv' \
    
-s '320x240' -b '250k' -aspect '4:3' -ac 1 -ab '64k' -ar '22050' -y \
    
/folder/video_name.flv
    

    
ffmpeg version N-46241-g09ea482 Copyright (c) 2000-2012 the FFmpeg developers
    
  built on Nov  5 2012 07:33:09 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-46)
    
  configuration: --prefix=/usr/local/bin/ffmpeg-1.0
    
  libavutil      52.  1.100 / 52.  1.100
    
  libavcodec     54. 70.100 / 54. 70.100
    
  libavformat    54. 35.100 / 54. 35.100
    
  libavdevice    54.  3.100 / 54.  3.100
    
  libavfilter     3. 21.105 /  3. 21.105
    
  libswscale      2.  1.101 /  2.  1.101
    
  libswresample   0. 16.100 /  0. 16.100
    
Guessed Channel Layout for  Input Stream #0.1 : mono
    
Guessed Channel Layout for  Input Stream #0.2 : mono
    
Guessed Channel Layout for  Input Stream #0.3 : mono
    
Guessed Channel Layout for  Input Stream #0.4 : mono
    
Guessed Channel Layout for  Input Stream #0.5 : mono
    
Guessed Channel Layout for  Input Stream #0.6 : mono
    
Guessed Channel Layout for  Input Stream #0.7 : mono
    
Guessed Channel Layout for  Input Stream #0.8 : mono
    
Guessed Channel Layout for  Input Stream #0.9 : mono
    
Guessed Channel Layout for  Input Stream #0.10 : mono
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/folder/video_name.mov':
    
  Metadata:
    
    major_brand     : qt
    
    minor_version   : 537199360
    
    compatible_brands: qt
    
    creation_time   : 2013-04-03 19:45:26
    
  Duration: 00:00:39.03, start: 0.000000, bitrate: 122149 kb/s
    
    Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le, 1920x1080, 110585 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 23976 tbn, 23976 tbc
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:59:53:00
    
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:4(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:5(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:6(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:7(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:8(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:9(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:10(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:11(eng): Data: none (tmcd / 0x64636D74)
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:30
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:59:53:00
    
Please use -b:a or -b:v, -b is ambiguous
    
Output #0, flv, to '/folder/video_name.flv':
    
  Metadata:
    
    major_brand     : qt
    
    minor_version   : 537199360
    
    compatible_brands: qt
    
    encoder         : Lavf54.35.100
    
    Stream #0:0(eng): Video: flv1 ([2][0][0][0] / 0x0002), yuv420p, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 250 kb/s, 1k tbn, 23.98 tbc
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:59:53:00
    
    Stream #0:1(eng): Audio: adpcm_swf ([1][0][0][0] / 0x0001), 22050 Hz, mono, s16, 88 kb/s
    
    Metadata:
    
      creation_time   : 2013-04-03 19:45:26
    
      handler_name    : Apple Alias Data Handler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (prores -> flv)
    
  Stream #0:1 -> #0:1 (pcm_s24le -> adpcm_swf)
    
Press [q] to stop, [?] for help
    
frame=   33 fps=0.0 q=2.0 size=     108kB time=00:00:01.99 bitrate= 442.4kbits/s    
    
frame=   66 fps= 65 q=2.0 size=     225kB time=00:00:02.97 bitrate= 619.0kbits/s    
    
frame=   99 fps= 65 q=2.0 size=     341kB time=00:00:04.96 bitrate= 561.8kbits/s    
    
frame=  136 fps= 67 q=2.0 size=     400kB time=00:00:05.99 bitrate= 547.5kbits/s    
    
frame=  177 fps= 70 q=3.0 size=     482kB time=00:00:07.98 bitrate= 494.3kbits/s    
    
frame=  210 fps= 69 q=3.7 size=     590kB time=00:00:08.96 bitrate= 539.7kbits/s    
    
frame=  240 fps= 68 q=6.3 size=     660kB time=00:00:10.01 bitrate= 539.7kbits/s    
    
frame=  264 fps= 65 q=6.7 size=     719kB time=00:00:11.01 bitrate= 535.2kbits/s    
    
frame=  288 fps= 63 q=8.4 size=     772kB time=00:00:12.02 bitrate= 526.1kbits/s    
    
frame=  312 fps= 62 q=15.4 size=     829kB time=00:00:13.65 bitrate= 497.4kbits/s    
    
frame=  336 fps= 60 q=10.4 size=     875kB time=00:00:14.02 bitrate= 511.1kbits/s    
    
frame=  360 fps= 59 q=10.6 size=     916kB time=00:00:15.01 bitrate= 499.9kbits/s    
    
frame=  383 fps= 58 q=17.8 size=     957kB time=00:00:15.97 bitrate= 490.6kbits/s    
    
frame=  411 fps= 58 q=6.5 size=    1008kB time=00:00:17.97 bitrate= 459.3kbits/s    
    
frame=  437 fps= 57 q=9.7 size=    1046kB time=00:00:18.99 bitrate= 451.3kbits/s    
    
frame=  460 fps= 57 q=7.7 size=    1086kB time=00:00:20.01 bitrate= 444.6kbits/s    
    
frame=  489 fps= 57 q=11.3 size=    1144kB time=00:00:20.99 bitrate= 446.3kbits/s    
    
frame=  512 fps= 56 q=10.3 size=    1182kB time=00:00:22.01 bitrate= 439.8kbits/s    
    
frame=  535 fps= 55 q=21.5 size=    1225kB time=00:00:22.98 bitrate= 436.7kbits/s    
    
frame=  564 fps= 55 q=18.3 size=    1280kB time=00:00:24.00 bitrate= 436.8kbits/s    
    
frame=  587 fps= 55 q=8.5 size=    1311kB time=00:00:24.98 bitrate= 429.7kbits/s    
    
frame=  610 fps= 54 q=11.9 size=    1349kB time=00:00:26.00 bitrate= 424.9kbits/s    
    
frame=  636 fps= 54 q=7.5 size=    1383kB time=00:00:26.98 bitrate= 419.8kbits/s    
    
frame=  659 fps= 54 q=9.6 size=    1421kB time=00:00:28.00 bitrate= 415.6kbits/s    
    
frame=  683 fps= 54 q=20.0 size=    1471kB time=00:00:29.02 bitrate= 415.1kbits/s    
    
frame=  711 fps= 54 q=6.4 size=    1518kB time=00:00:30.00 bitrate= 414.5kbits/s    
    
frame=  742 fps= 54 q=6.2 size=    1558kB time=00:00:31.02 bitrate= 411.5kbits/s    
    
frame=  774 fps= 54 q=2.5 size=    1601kB time=00:00:33.01 bitrate= 397.1kbits/s    
    
frame=  816 fps= 55 q=2.0 size=    1632kB time=00:00:34.50 bitrate= 387.6kbits/s    
    
frame=  861 fps= 56 q=2.0 size=    1670kB time=00:00:35.99 bitrate= 380.1kbits/s    
    
frame=  905 fps= 57 q=2.0 size=    1706kB time=00:00:38.03 bitrate= 367.4kbits/s    
    
frame=  936 fps= 58 q=2.0 Lsize=    1730kB time=00:00:39.05 bitrate= 362.8kbits/s
    
video:1278kB audio:423kB subtitle:0 global headers:0kB muxing overhead 1.654557%

  • Resources for learning Metal for Video Editing [on hold]

    28 septembre 2019, par Andrew Sawyer

    I am trying to build a video editing system in Swift for my iOS app. I assume that Metal would be the best system for this as it is extremely powerful. I am unsure where to start learning about Metal because most resources are related to game development.

    In V1 of my app I have used AVFoundation and an AVMutableComposition. However, in this version I need something more complex where I am able to do more effects, layering, etc.

    Is Metal the best way to do this or would another method (FFMpeg, Open GL, etc.) be better ?
    If so, what are the best resources to learn how to use Metal for this application ?

    Thank You !

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