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Médias (1)
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MediaSPIP Simple : futur thème graphique par défaut ?
26 septembre 2013, par
Mis à jour : Octobre 2013
Langue : français
Type : Video
Autres articles (97)
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Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...) -
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" ;
Sur d’autres sites (9763)
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How to output fragmented mp4 with ffmpeg ?
12 octobre 2016, par S Bffmpeg -i infile.avi out.mp4
outputs non-fragmented MP4.How do I obtain fragmented mp4 ?
Update
A fragmented mp4 file is internally divided into several back-to-back chunks or MPEG-4 movie fragments. Each chunk has its own moof atom - so there are several moof atoms interleaved in the file instead of a single moov at the end as in the case of an unfragmented mp4. This makes it easier to stream over slow networks where buffering is involvedThere are several tools like mp4box that convert a normal mp4 to a fragmented one. Unfortunately we cannot use something like this
ffmpeg <options to="to" output="output" mp4="mp4"> | mp4box
</options>since ffmpeg does not produce seekable output while producing mp4 containers.
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How to output fragmented mp4 with ffmpeg ?
4 mars, par S Bffmpeg -i infile.avi out.mp4
outputs non-fragmented MP4.


How do I obtain fragmented mp4 ?



Update
A fragmented mp4 file is internally divided into several back-to-back chunks or MPEG-4 movie fragments. Each chunk has its own moof atom - so there are several moof atoms interleaved in the file instead of a single moov at the end as in the case of an unfragmented mp4. This makes it easier to stream over slow networks where buffering is involved



There are several tools like mp4box that convert a normal mp4 to a fragmented one. Unfortunately we cannot use something like this



ffmpeg <options to="to" output="output" mp4="mp4"> | mp4box
</options>



since ffmpeg does not produce seekable output while producing mp4 containers.


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how to automatically oversample and downsample when using filters ?
4 juin 2021, par Yue WangI am researching avfilters. Say I have an audio with sample rate
s
, and bit depthd
,

What I want to do is to write a graph that


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- upsample
s
by 4x, and set precision to 64bit float - apply some biquad filters with 64bit precision
- downsample by 4x back to
s
, and set bit depth back tod
.








The reason to oversample is to get better filtering result by antialiasing, and the reason to downsample is to stream using the original source format.


I don't know if there's way that I can do it automatically in the graph.


ashowinfo
could print out the sample rate, but seems there's no way to use the value later in the pipeline.

asoftclip
has aoversample
factor. but it's not available in other filters.

- upsample