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Médias (1)
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Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
Autres articles (64)
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ANNEXE : Les plugins utilisés spécifiquement pour la ferme
5 mars 2010, parLe site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)
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Emballe médias : à quoi cela sert ?
4 février 2011, parCe 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" ; -
Gestion des droits de création et d’édition des objets
8 février 2011, parPar 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 ;
Sur d’autres sites (10173)
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ffmpeg producing empty MP4 files
3 mai 2017, par Joshua DowellI am trying to use ffmpeg to convert MTS files to MP4 files. It seems as though the command is running correctly, but the resulting files end up being empty.
joshua@joshua-VirtualBox:~$ ffmpeg -i /media/sf_2017-04/SD_044/00007.MTS /media/sf_2017-04/SD_04/000007.mp4
ffmpeg version 0.8.17-4:0.8.17-0ubuntu0.12.04.2, Copyright (c) 2000-2014 the Libav developers
built on Apr 1 2016 14:28:02 with gcc 4.6.3
The ffmpeg program is only provided for script compatibility and will be removed
in a future release. It has been deprecated in the Libav project to allow for
incompatible command line syntax improvements in its replacement called avconv
(see Changelog for details). Please use avconv instead.
Input #0, mpegts, from '/media/sf_2017-04/SD_044/00007.MTS':
Duration: 00:01:17.07, start: 1.927822, bitrate: 25053 kb/s
Program 1
Stream #0.0[0x1011]: Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 59.96 fps, 59.94 tbr, 90k tbn, 119.88 tbc
Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
Stream #0.2[0x1200]: Data: [144][0][0][0] / 0x0090
File '/media/sf_2017-04/SD_04/000007.mp4' already exists. Overwrite ? [y/N] y
[buffer @ 0x88772a0] w:1920 h:1080 pixfmt:yuv420p
ffmpeg -i /media/sf_2017-04/SD_044/00007.MTS /media/sf_2017-04/SD_04/000007.mp4
ffmpeg version 0.8.17-4:0.8.17-0ubuntu0.12.04.2, Copyright (c) 2000-2014 the Libav developers
built on Apr 1 2016 14:28:02 with gcc 4.6.3
The ffmpeg program is only provided for script compatibility and will be removed
in a future release. It has been deprecated in the Libav project to allow for
incompatible command line syntax improvements in its replacement called avconv
(see Changelog for details). Please use avconv instead.
Input #0, mpegts, from '/media/sf_2017-04/SD_044/00007.MTS':
Duration: 00:01:17.07, start: 1.927822, bitrate: 25053 kb/s
Program 1
Stream #0.0[0x1011]: Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 59.96 fps, 59.94 tbr, 90k tbn, 119.88 tbc
Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
Stream #0.2[0x1200]: Data: [144][0][0][0] / 0x0090
File '/media/sf_2017-04/SD_04/000007.mp4' already exists. Overwrite ? [y/N] y
[buffer @ 0x88772a0] w:1920 h:1080 pixfmt:yuv420p
encoder 'aac' is experimental and might produce bad results.
Add '-strict experimental' if you want to use it. -
avcodec/dvdsubdec : Fix runtime error : left shift of 242 by 24 places cannot be repres...
5 mai 2017, par Michael Niedermayeravcodec/dvdsubdec : Fix runtime error : left shift of 242 by 24 places cannot be represented in type 'int'
Fixes : 1080/clusterfuzz-testcase-5353236754071552
Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc> -
avfilter's anull says "Rematrix is needed between stereo and 0 channels but there is not enough information to do it"
24 mai 2017, par kuanyuiI’m trying to write a transcoder according to FFMpeg’s official example with ffmpeg 3.2.4 (official prebuild Win32), and try to transcode a video with stereo audio stream source (from
avformat
’sdshow
).In the example code, which passes
anull
intoavfilter_graph_parse_ptr()
for audio stream, and"time_base=1/44100:sample_rate=44100:sample_fmt=s16:channels=2:channel_layout=0x3"
is passed intoavfilter_graph_create_filter()
, occurs error in the followingavfilter_graph_config()
:[auto-inserted scaler 0 @ 32f77600] w:iw h:ih flags:'bilinear' interl:0
[Parsed_null_0 @ 2e9d79a0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'in' and the filter 'Parsed_null_0'
[swscaler @ 3331bfe0] deprecated pixel format used, make sure you did set range correctly
[auto-inserted scaler 0 @ 32f77600] w:1920 h:1080 fmt:yuvj422p sar:1/1 -> w:1920 h:1080 fmt:yuv420p sar:1/1 flags:0x2
[libmp3lame @ 2e90a360] Channel layout not specified
[in @ 3866e8a0] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x3
[Parsed_anull_0 @ 330e8820] auto-inserting filter 'auto-inserted resampler 0' between the filter 'in' and the filter 'Parsed_anull_0'
[auto-inserted resampler 0 @ 330e8dc0] [SWR @ 3809b620] Rematrix is needed between stereo and 0 channels but there is not enough information to do it
[auto-inserted resampler 0 @ 330e8dc0] Failed to configure output pad on auto-inserted resampler 0I’ve googled for days but didn’t find any clue for it. Doesn’t what
anull
do is only "Pass the audio source unchanged to the output", why libav want to resample stereo to 0 channel ? What’s going wrong ?