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Autres articles (67)
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Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page. -
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 (...) -
De l’upload à la vidéo finale [version standalone]
31 janvier 2010, parLe chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
Upload et récupération d’informations de la vidéo source
Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)
Sur d’autres sites (7491)
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php fread returns empty after one time of execution for popen
20 avril 2021, par HamedI'm trying to get real-time output from ffmpeg command with popen, but it returns empty after one time of execution in the loop.


<?php

$a = popen('ffpb -i mymovie.mp4 -vf subtitles=subtitles.srt mysubtitledmovie.mp4 2>&1', 'r');


while (true) {
 $b = fread($a, 2096);

 var_dump($b) . "<br />\n";

 ob_flush();
 flush();

 sleep(1);
}


The output : :


mymovie.mp4: 0%| | 0/61080.0 [00:00<?, ? frames/s]"
string(105) "Unexpected exception: 'ascii' codec can't encode characters in position 43-47: ordinal 
not in range(128)
"
string(0) ""
string(0) ""
string(0) ""


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FFmpeg av_hwdevice_ctx_create returns ENOMEM
4 mars 2021, par lnogueirI am trying to perform h264 video encoding on a GPU using the ffmpeg's vaapi library.


I have been following this example from ffmpeg Github repo.


It fails for me here :


AVBufferRef* vaapi_encoder;
int err = av_hwdevice_ctx_create(&vaapi_encoder, AV_HWDEVICE_TYPE_VAAPI,
 NULL, NULL, 0);


This returns -12, which maps to
ENOMEM(out of memory) error, but that doesn't make sense to me because I have plenty of memory.

For reference, this is my output after running 'vainfo' :


libva info: VA-API version 1.7.0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_7
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.7 (libva 2.6.0)
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 20.1.1 ()
vainfo: Supported profile and entrypoints
 VAProfileMPEG2Simple : VAEntrypointVLD
 VAProfileMPEG2Main : VAEntrypointVLD
 VAProfileH264Main : VAEntrypointVLD
 VAProfileH264Main : VAEntrypointEncSliceLP
 VAProfileH264High : VAEntrypointVLD
 VAProfileH264High : VAEntrypointEncSliceLP
 VAProfileJPEGBaseline : VAEntrypointVLD
 VAProfileJPEGBaseline : VAEntrypointEncPicture
 VAProfileH264ConstrainedBaseline: VAEntrypointVLD
 VAProfileH264ConstrainedBaseline: VAEntrypointEncSliceLP
 VAProfileVP8Version0_3 : VAEntrypointVLD
 VAProfileHEVCMain : VAEntrypointVLD
 VAProfileHEVCMain10 : VAEntrypointVLD
 VAProfileVP9Profile0 : VAEntrypointVLD
 VAProfileVP9Profile2 : VAEntrypointVLD


Thanks !


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libavfilter - reconfigure filter graph using avfilter_graph_parse_ptr returns -22
16 juillet 2021, par RahulI am using
transcode.csample from ffmpeg examples and it is working as expected. It usesavfilter_graph_parse_ptrto setup filter graph and it works fine.

However, I need change filter graph dynamically and there
avfilter_graph_parse_ptrfails. It returns -22. I am not certain if it is a valid operation to do (reconfigure) ? If it is possible, does it require more thanavfilter_graph_parse_ptrandavfilter_graph_parse_ptr? libavfilter documentation doesn't say anything about reconfigure or reset existing graph.

I can create a new graph but I am avoiding it since it is affecting the existing buffers.


Thank you for your insight.


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