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Autres articles (13)
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La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...) -
Submit bugs and patches
13 avril 2011Unfortunately a software is never perfect.
If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
You may also (...) -
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 (...)
Sur d’autres sites (5551)
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FFMPEG change Tone Frequency (Pitch Audio)
16 septembre 2022, par dazzafactHow can I change the Tone frequency.
This Example only pitches it by keeping the old tone frequency and only decrease the length of File.


For Example, I have a constant 100 Herz tone (as mp3) and I want it to change 90 Herz


ffmpeg -i 100h.mp3 -af atempo=100/90 90h.mp3



This Example doesn't work for me, it sounds the same


inputfile Mp3

outputfile Mp3

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Streaming Web cam real-time buffer [Toshiba Webcam] [video input] too full or near too full
21 avril 2015, par esprittnI am trying to stream my webcam with audio from microphone of laptop(OS : windows 7 ) to nginx server (Compiled with rtmp module in CentOS 6.6 final) in same local network.
From my laptop, I execute this command in CMD :ffmpeg -f dshow -i video="Toshiba Webcam" -f dshow -i audio="Microphone (Périphérique High D" -vf scale=1280:720 -vcodec libx264 -r 60.97 -acodec libvo_aacenc -ac 2 -ar 44100 -ab 128 -pix_fmt yuv420p -tune zerolatency -preset ultrafast -f flv "rtmp://172.16.40.162/dash/test"
But I got this message :
And I had about retard delay of 23 second when I open http://localhost:8080 ( I made the indx.html file of nginx with JWPlayer)
So my questions are :
How can I improve the ffmpeg cmd to avoid the errors of buffer too full ?
How eliminate or reduce the latency ?
Thanks for your help.
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avcodec/encode : Avoid check whose result is known in advance
28 juin 2022, par Andreas Rheinhardtavcodec/encode : Avoid check whose result is known in advance
encode_send_frame_internal() is always only called if
the buffer packet is empty and except when we are dealing
with an audio codec that does not allow variable frame size
it stays that way until a call to av_frame_ref() at the end
of encode_send_frame_internal(). In case we are dealing
with the small last frame of an audio encoder requiring
constant frame size the frame will be allocated by pad_last_frame()
and this the only case where this is so. So by returning directly
after pad_last_frame(), we can avoid having to recheck
whether the frame is still empty before av_frame_ref().Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>