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Médias (1)
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Sintel MP4 Surround 5.1 Full
13 mai 2011, par
Mis à jour : Février 2012
Langue : English
Type : Video
Autres articles (71)
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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 ;
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Supporting all media types
13 avril 2011, parUnlike 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 (...)
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Qualité du média après traitement
21 juin 2013, parLe bon réglage du logiciel qui traite les média est important pour un équilibre entre les partis ( bande passante de l’hébergeur, qualité du média pour le rédacteur et le visiteur, accessibilité pour le visiteur ). Comment régler la qualité de son média ?
Plus la qualité du média est importante, plus la bande passante sera utilisée. Le visiteur avec une connexion internet à petit débit devra attendre plus longtemps. Inversement plus, la qualité du média est pauvre et donc le média devient dégradé voire (...)
Sur d’autres sites (10652)
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Merge commit 'f7ec7f546f0021d28da284b024416b916b61c974'
27 septembre 2017, par James AlmerMerge commit 'f7ec7f546f0021d28da284b024416b916b61c974'
* commit 'f7ec7f546f0021d28da284b024416b916b61c974' :
wma : Convert to the new bitstream readerThis commit is a noop, see
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-April/209609.htmlMerged-by : James Almer <jamrial@gmail.com>
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avconv transcoding drops frames
8 mars 2015, par ziggestardustI have a logitech c920 that I can send perfectly fine to a wowza server with this with excelent results :
./capture -o -c0|avconv -f alsa -b 128k -i hw:1 -re -i - -vcodec copy -ar 44100 -bufsize 1835k -map 0:0 -map 1:0 -f flv rtmp://myhost/live/streamname
(capture program is from here : http://derekmolloy.ie/streaming-video-using-rtp-on-the-beaglebone-black/ I’m not using beaglebone, but his capture software runs excellent on my debian pc)
However, I want to store the h264 stream from the camera down to disk, and later send it in a lower resolution with avconv so I’m playing with libx264
It seems I can’t even do this without getting drops :
./capture -o -c0|avconv -f alsa -b 128k -i hw:1 -re -i - -vcodec libx264 -ar 44100 -bufsize 1835k -map 0:0 -map 1:0 -f flv rtmp://myhost/live/streamname
This is what avconv ’-v verbose’ shows :
alsa @ 0x864b940] Estimating duration from bitrate, this may be inaccurate
Input #0, alsa, from 'hw:1':
Duration: N/A, start: 22758.998967, bitrate: N/A
Stream #0.0: Audio: pcm_s16le, 32000 Hz, 2 channels, s16, 1024 kb/s
.................................................................................................................................[h264 @ 0x8659400] max_analyze_duration reached
[h264 @ 0x8659400] Estimating duration from bitrate, this may be inaccurate
Input #1, h264, from 'pipe:':
Duration: N/A, bitrate: N/A
Stream #1.0: Video: h264 (Constrained Baseline), yuvj420p, 1280x720 [PAR 1:1 DAR 16:9], 25 fps, 25 tbr, 1200k tbn, 48 tbc
Parsing...
Parsed protocol: 0...... and then this :
Output #0, flv, to 'rtmp://mystream/live/streamname':
Metadata:
encoder : Lavf53.21.1
Stream #0.0: Audio: libmp3lame, 44100 Hz, 2 channels, s16, 200 kb/s
Stream #0.1: Video: libx264, yuvj420p, 1280x720 [PAR 1:1 DAR 16:9], q=-1--1, 1k tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le -> libmp3lame)
Stream #1:0 -> #0:1 (h264 -> libx264)
Press ctrl-c to stop encoding
[alsa @ 0x864b940] ALSA buffer xrun.
*** drop!
Last message repeated 39 times
*** drop!11 fps= 0 q=0.0 size= 0kB time=0.03 bitrate= 116.9kbits/s dup=0 drop=40
Last message repeated 46 times
*** drop!22 fps= 21 q=0.0 size= 0kB time=0.03 bitrate= 116.9kbits/s dup=0 drop=87
. Last message repeated 20 timesss
.....*** drop! 27 fps= 13 q=0.0 size= 0kB time=0.03 bitrate= 116.9kbits/s dup=0 drop=108
Last message repeated 3 timess
..*** drop! fps= 10 q=0.0 size= 0kB time=0.03 bitrate= 116.9kbits/s dup=0 drop=112
Last message repeated 5 timesss
.*** drop!0 fps= 9 q=0.0 size= 0kB time=0.03 bitrate= 116.9kbits/s dup=0 drop=118
. Last message repeated 5 timess
.*** drop!2 fps= 9 q=0.0 size= 0kB time=0.03 bitrate= 116.9kbits/s dup=0 drop=124
Last message repeated 6 timesss
.*** drop!3 fps= 8 q=0.0 size= 0kB time=0.03 bitrate= 116.9kbits/s dup=0 drop=131
^C Last message repeated 1 times
*** drop!
Last message repeated 3 timesI have tried with ffmpeg but it gives same result with dropped frames.
Any help appreciated
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Convert a ffmpeg video to an appropriate dimension
6 mars 2015, par georgechalhoubI am writing a video conversion script using ffmpeg, it has been completed to full. Ideally, my video conversion script should output the video to many formats (like YouTube) :
- 140p : 256 x 144
- 240p : 426 x 240
- 360p : 640 x 360
- 480p : 854 x 480
- 720p : 1280 x 720
- 1080p : 1920x 1080
The problem I am facing is that if a user uploads a 480p (854 x 480) video or close to 480p (854 x 480) the script will convert to all formats (1080p and 720p) which would seem like a waste of bandwidth and disk space in this case.
The problem isn’t as easy as it seems. If a user uploads a 500 x 300 video I don’t want it to get converted to a 240p, there has to be some estimations.
Who can help me or has some experience with such kind of problems ?