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DJ Dolores - Oslodum 2004 (includes (cc) sample of “Oslodum” by Gilberto Gil)
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
Autres articles (33)
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Les formats acceptés
28 janvier 2010, parLes commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
ffmpeg -codecs ffmpeg -formats
Les format videos acceptés en entrée
Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
Les formats vidéos de sortie possibles
Dans un premier temps on (...) -
Participer à sa documentation
10 avril 2011La documentation est un des travaux les plus importants et les plus contraignants lors de la réalisation d’un outil technique.
Tout apport extérieur à ce sujet est primordial : la critique de l’existant ; la participation à la rédaction d’articles orientés : utilisateur (administrateur de MediaSPIP ou simplement producteur de contenu) ; développeur ; la création de screencasts d’explication ; la traduction de la documentation dans une nouvelle langue ;
Pour ce faire, vous pouvez vous inscrire sur (...) -
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 (...)
Sur d’autres sites (6046)
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FFmpeg api, how to mux raw h264 without pts timestamps to mp4 or m3u8
17 août 2022, par Hudson CavazinI tried to follow the following example : https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/muxing.c



Problem : my stream h264 is not possible to do demux, so the frames I send to the encoder have some blank data, example
pkt.pts == AV_NOPTS_VALUE
, this causes an error when calling theav_interleaved_write_frame
(mux) function.


Considering that the framerate is not constant, how do I generate the
pkt.pts
correctly from the video frames as I get it from the raw live stream ?


Is there any way for ffmpeg libav to automatically calculate
pkt.pts
,pkt.dts
timestamps as I send frames to the muxer withav_interleaved_write_frame
?

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FFMPEG Container Change Cannot View Audio Channels or Audio Sample Rate On File Details
6 juillet 2014, par user3089120I’m using FFMPEG to change the container from AVI to MP4. After this change has been done, I’m right-clicking on the mp4 file and selecting properties, then clicking the "Details" tab. The number of audio "Channels" and "Audio sample rate" is blank. I want it to show the information for that file. The original file shows this information. I do not want to re-encode just change the container. Here is the FFMPEG command I’m using :
ffmpeg -i "F :\TEST ENVIRONMENT\Test.avi" -c:v copy -c:a copy "F :\TEST ENVIRONMENT\Test1.mp4"
Would really appreciate your help with this issue.
Thank you
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X264 input frame persistence
18 octobre 2017, par martin_Issue : X264 input frame persistence/ validity - duration.
Description : I set up an encoder using X264, and created some test cases.
1. Simple linear encode
2. Parallel simultaneous encodes
3. Threaded Encoding
4. Threaded time delayed start encoding.All worked well, and I was happy with the results. Then I threw one more test at the encoder. I started nullifying (memset(0)) input frames after they had been passed to the encoder, which is what I would expect to happen in the final application ; the results were that ’blank’ (green - I420) frames started getting passed into the output stream.
Hence my question - how many old frames do I have to keep in memory for the encoder to function properly ? Is this a configurable parameter ? Or moreover which parameter controls this behaviour. I was using ’high’ as the profile. Baseline didn’t exhibit these issues.
Thanks
Martin