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XMP PHP
13 mai 2011, parDixit Wikipedia, XMP signifie :
Extensible Metadata Platform ou XMP est un format de métadonnées basé sur XML utilisé dans les applications PDF, de photographie et de graphisme. Il a été lancé par Adobe Systems en avril 2001 en étant intégré à la version 5.0 d’Adobe Acrobat.
Étant basé sur XML, il gère un ensemble de tags dynamiques pour l’utilisation dans le cadre du Web sémantique.
XMP permet d’enregistrer sous forme d’un document XML des informations relatives à un fichier : titre, auteur, historique (...) -
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 (...) -
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 (...)
Sur d’autres sites (11980)
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how to use glob in ffmpeg [on hold]
6 août 2013, par tainguyenI'm trying to use FFMpeg to create video with several png images that don't follow a sequence number. With the following command line
ffmpeg -f image2 -r 1 -pattern_type glob -i '*.png' -c:v libx264 mov.mp4
but it get error :
[image2 @ 0268b600] Pattern type 'glob' was selected but globbing is
not supported by this libavformat build '*.png' : Function not implementedso, how do I fix this error. I'm using windows 7 64bit
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Transcode HLS Segments individually using FFMPEG
27 mai 2013, par rayhI am recording a continuous, live stream to a high-bitrate HLS stream. I then want to asynchronously transcode this to different formats/bitrates. I have this working, mostly, except audio artefacts are appearing between each segment (gaps and pops).
Here is an example ffmpeg command line :
ffmpeg -threads 1 -nostdin -loglevel verbose \
-nostdin -y -i input.ts -c:a libfdk_aac \
-ac 2 -b:a 64k -y -metadata -vn output.tsInspecting an example sound file shows that there is a gap at the end of the audio :
And the start of the file looks suspiciously attenuated (although this may not be an issue) :
My suspicion is that these artefacts are happening because transcoding are occurring without the context of the stream as a whole.
Any ideas on how to convince FFMPEG to produce audio that will fit back into a HLS stream ?
** UPDATE 1 **
Here are the start/end of the original segment. As you can see, the start still appears the same, but the end is cleanly ended at 30s. I expect some degree of padding with lossy encoding, but I there is some way that HLS manages to do gapless playback (is this related to iTunes method with custom metadata ?)
** UPDATED 2 **
So, I converted both the original (128k aac in MPEG2 TS) and the transcoded (64k aac in aac/adts container) to WAV and put the two side-by-side. This is the result :
I'm not sure if this is representative of how a client will play it back, but it seems a bit odd that decoding the transcoded one introduces a gap at the start and makes the segment longer. Given they are both lossy encoding, I would have expected padding to be equally present in both (if at all).
** UPDATE 3 **
According to http://en.wikipedia.org/wiki/Gapless_playback - Only a handful of encoders support gapless - for MP3, I've switched to lame in ffmpeg, and the problem, so far, appears to have gone.
For AAC (see http://en.wikipedia.org/wiki/FAAC), I have tried libfaac (as opposed to libfdk_aac) and it also seems to produce gapless audio. However, the quality of the latter isn't that great and I'd rather use libfdk_aac is possible.
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ffmpeg not using wildcard properly from batch script
20 mars 2013, par Paul GreenWhat I want to do is actually super simple and is working just fine if executed from within the cmd window, though it does not work when used within a batch script. The following command would normally get all .png files with the pattern anim_xxxx.png (%04d stands for 4 numbers in ffmpeg).
ffmpeg -f image2 -i anim_%04d.png -vcodec mjpeg -q:v 0 -r 25 foo.avi
Now the error I get is with the wildcard for my image sequence and I have no clue what the problem is. Using another wildcard like * gives me the same error.
[image2 @ 000000000033e8c0] Could find no file with with path
'anim_render.bat4d.png' and index in the range 0-4
anim_render.bat4d.png : No such file or directorydoes %04d resemble any variable in a batch file that does not exist outside of batch files ? I could not find any similar cases so far.