Recherche avancée

Médias (1)

Mot : - Tags -/net art

Autres articles (88)

  • Taille des images et des logos définissables

    9 février 2011, par

    Dans beaucoup d’endroits du site, logos et images sont redimensionnées pour correspondre aux emplacements définis par les thèmes. L’ensemble des ces tailles pouvant changer d’un thème à un autre peuvent être définies directement dans le thème et éviter ainsi à l’utilisateur de devoir les configurer manuellement après avoir changé l’apparence de son site.
    Ces tailles d’images sont également disponibles dans la configuration spécifique de MediaSPIP Core. La taille maximale du logo du site en pixels, on permet (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • Pas question de marché, de cloud etc...

    10 avril 2011

    Le vocabulaire utilisé sur ce site essaie d’éviter toute référence à la mode qui fleurit allègrement
    sur le web 2.0 et dans les entreprises qui en vivent.
    Vous êtes donc invité à bannir l’utilisation des termes "Brand", "Cloud", "Marché" etc...
    Notre motivation est avant tout de créer un outil simple, accessible à pour tout le monde, favorisant
    le partage de créations sur Internet et permettant aux auteurs de garder une autonomie optimale.
    Aucun "contrat Gold ou Premium" n’est donc prévu, aucun (...)

Sur d’autres sites (10943)

  • Convert AVFrame to CVPixelBufferRef to use in function CVOpenGLESTextureCacheCreateTextureFromImage

    7 juin 2013, par hard gamer

    I've a custom video player on iOS platform, I read many threads for performance tuning about using CVOpenGLESTextureCacheCreateTextureFromImage API. But, this API is always used with Apple decoders, so as Apple decoders provide CVPixelBufferRef, I can not find any way to convert ffmpeg's AVFrame to CVPixelBufferRef...

    Can anyone guide me for this topic ?

    Is it possible to use CVOpenGLESTextureCacheCreateTextureFromImage API for AVFrames of ffmpeg ? If yes, how ?

  • ffmpeg : How to create multi playlist m3u8 ?

    21 août 2018, par noc

    I have an example :

    ffmpeg -loglevel debug -threads 4 -vsync 1 -i 'bunny.mp4' -vf yadif -g 29.97 -r 29.97 -b:v:0 5250k -c:v h264_nvenc -preset llhq -vcodec vbr_hq -pix_fmt yuv420p -profile:v main -level 4.1 -strict_gop 1 -rc-lookahead 32 -no-scenecut 1 -forced-idr 1 -gpu 0 -b:v:1 4200k -c:v h264_nvenc -preset llhq -rc:v vbr_hq -pix_fmt yuv420p -profile:v main -level 4.1 -strict_gop 1 -rc-lookahead 32 -no-scenecut 1 -forced-idr 1 -gpu 1 -b:v:1 3150k -c:v h264_nvenc -preset llhq -rc:v vbr_hq -pix_fmt yuv420p -profile:v main -level 4.1 -strict_gop 1 -rc-lookahead 32 -no-scenecut 1 -forced-idr 1 -gpu 2 -b:a:0 256k -b:a:0 192k -b:a:0 128k -c:a aac -ar 48000  -map 0:v -map 0:a:0 -map 0:v -map 0:a:0 -map 0:v -map 0:a:0 -f hls -var_stream_map "v:0,a:0  v:1,a:1 v:2,a:2" -master_pl_name  master.m3u8 -t 300 -hls_time 10 -hls_init_time 4 -hls_list_size 10 -master_pl_publish_rate 10 -hls_flags delete_segments+discont_start+split_by_time "out/manifest.m3u8"

    but alltime a have error like :
    Unrecognized option ’rc:v’
    Unrecognized option ’strict_gop’

    I’d like to create the playlist like this :

    #EXTM3U
    
#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=688301
    
http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/0640_vod.m3u8
    
#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=165135
    
http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/0150_vod.m3u8
    
#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=262346
    
http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/0240_vod.m3u8
    
#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=481677
    
http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/0440_vod.m3u8
    
#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=1308077
    
http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/1240_vod.m3u8
    
#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=1927853
    
http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/1840_vod.m3u8
    
#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=2650941
    
http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/2540_vod.m3u8
    
#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=3477293
    
http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/3340_vod.m3u8

    with ability to choose quality in player (videojs)

  • Is there a method to identify the audio channel layout ?

    2 septembre 2016, par Pony

    A video file has many channels, and each channel is contained in a stream, e.g.

    libavutil      52. 38.100 / 52. 38.100
    
libavcodec     55. 18.102 / 55. 18.102
    
libavformat    55. 12.100 / 55. 12.100
    
libavdevice    55.  3.100 / 55.  3.100
    
libavfilter     3. 79.101 /  3. 79.101
    
libswscale      2.  3.100 /  2.  3.100
    
libswresample   0. 17.102 /  0. 17.102
    
libpostproc    52.  3.100 / 52.  3.100
    
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
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/data/tmp/ff6.mov':
    
Metadata:
    
major_brand     : qt  
    
minor_version   : 537199360
    
compatible_brands: qt  
    
creation_time   : 2015-01-16 17:54:47
    
Duration: 00:01:54.00, start: 0.000000, bitrate: 160836 kb/s
    
Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le, 1920x1080, 154650 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc
    
Metadata:
    
  creation_time   : 2015-01-16 17:54:47
    
  handler_name    : Apple Alias Data Handler
    
  timecode        : 00:59:55:00
    
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s
    
Metadata:
    
  creation_time   : 2015-01-16 17:54:47
    
  handler_name    : Apple Alias Data Handler
    
Stream #0:2(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s
    
Metadata:
    
  creation_time   : 2015-01-16 17:54:47
    
  handler_name    : Apple Alias Data Handler
    
Stream #0:3(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s
    
Metadata:
    
  creation_time   : 2015-01-16 17:54:47
    
  handler_name    : Apple Alias Data Handler
    
Stream #0:4(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s
    
Metadata:
    
  creation_time   : 2015-01-16 17:54:47
    
  handler_name    : Apple Alias Data Handler
    
Stream #0:5(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s
    
Metadata:
    
  creation_time   : 2015-01-16 17:54:47
    
  handler_name    : Apple Alias Data Handler
    
Stream #0:6(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s
    
Metadata:
    
  creation_time   : 2015-01-16 17:54:47
    
  handler_name    : Apple Alias Data Handler
    
Stream #0:7(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s
    
Metadata:
    
  creation_time   : 2015-01-16 17:54:47
    
  handler_name    : Apple Alias Data Handler
    
Stream #0:8(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s
    
Metadata:
    
  creation_time   : 2015-01-16 17:54:47
    
  handler_name    : Apple Alias Data Handler
    
Stream #0:9(eng): Data: none (tmcd / 0x64636D74)
    
Metadata:
    
  creation_time   : 2015-01-16 17:55:17
    
  handler_name    : Apple Alias Data Handler
    
  timecode        : 00:59:55:00

    Is there a method to identify which stream represents the left channel, and which represent right channel, and so on.
    Thanks for reviewing my question.

Navigation