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Revolution of Open-source and film making towards open film making
6 octobre 2011, par
Mis à jour : Juillet 2013
Langue : English
Type : Texte
Autres articles (48)
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Demande de création d’un canal
12 mars 2010, parEn fonction de la configuration de la plateforme, l’utilisateur peu avoir à sa disposition deux méthodes différentes de demande de création de canal. La première est au moment de son inscription, la seconde, après son inscription en remplissant un formulaire de demande.
Les deux manières demandent les mêmes choses fonctionnent à peu près de la même manière, le futur utilisateur doit remplir une série de champ de formulaire permettant tout d’abord aux administrateurs d’avoir des informations quant à (...) -
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 (...) -
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 (...)
Sur d’autres sites (6223)
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DXVA2/D3D11 encoders not available in FFmpeg for no apparent reason
3 juillet 2020, par user1134621this is a weird one. I am trying to set up FFmpeg for hardware encoding of a live input into h264. I got it working fine on Linux with VAAPI. On Windows I was probably successful as well with NVENC but I do not have a NVENC capable card to check. What has been giving me a headache is encoding through DXVA2 or D3D11VA. FFmpeg picks up available hardware but it will not give me any suitable encoders. I even built FFmpeg myself to make sure that all the CONFIG_DXVA_HWACCEL switches are enabled, I can grep the binary for
h264_dxva2
etc. and see that they are there. However, callingavcodec_find_encoder_by_name
always returns NULL.h264_vaapi
orh264_nvenc
work fine though. I am obviously missing something stupid. Do you have any suggestions where to look ? Thanks.

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FFMPEG with javaCV can't open stream
29 juin 2015, par rgomesI having a strange behavior when testing to get the video Stream of a Mobotix camera, I’m using javaCV 0.11.
When I set a timeout I can’t open the stream, the stream only open if I don’t set the timeout parameter.I verified this behavior with javaCV 0.11 and Java CV 0.11 in version 0.9 and 0.8 it works with the timeout.
Probably an error of the lib JavaCV or the way I’m using it :P
My question for the ffmpeg experts is the following :
When I’m calling :
avformat_open_input
the function returns -138
I called the function av_strerror fir this error code and the function was returned "Error number -138 occurred".
A description not very useful, can someone tell me what this error means ?
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ffmpeg lavfi distorted audio
11 mars 2017, par JohnHow to play audio at a normal rate ?
First 2s play fine, then audio becomes distorted, it seems to speed up.
ffmpeg -f image2 -loop 1 -framerate 25 -i example.jpg -lavfi "amovie=sample.aac:loop=0" -f flv rtmp://192.168.99.100:1935/live/mystream2
Repeating audio with loop:0 returns `[flv @ 0000000000708220] Non-monotonous DTS in output stream 0:0 ;
audio : http://cdn.online-convert.com/example-file/audio/example.aac
Thank you.