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Médias (1)
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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (70)
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Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
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List of compatible distributions
26 avril 2011, parThe table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...) -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir
Sur d’autres sites (9390)
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Revision 16450 : sync with encoder_example@16448
7 août 2009, par j — Logsync with encoder_example@16448
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FFMPEG video audio sync
23 février 2023, par user1774074There are many questions regarding audio and video sync when processing videos with FFMPEG, but I couldn't find the answer for this one :


I record rtsp stream with the following command :


ffmpeg -rtsp_transport udp -i rtsp://streamAddress -vcodec copy -acodec copy -copyts -flags +bitexact -ss 00:00:02 -y output.avi



I extract the audio with the following command :


ffmpeg -y -i output.avi -vn -flags +bitexact -f wav output.wav



I search for event from output.wav and generate timestamps
startTime
andduration


I cut and transcode the original video with the following command :


ffmpeg -y -i output.avi -cpu-used 16 -r 100 -threads 15 -b:v 2400k -vcodec libvpx -s 850x480 -an -ss startTime -t duration final.webm



I can see this procedure loses the sync between video and audio but I can't find the reason. in Which part of commands the sync is lost and why ?


My rtsp stream specs are :


Profile Name : H.264


Resolution 1280x720


Output Frame Rate : 100


GOP : 15


Stream Mode : CBR


Bitrate : 5 Mbps


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Use a cross-frame compatible instanceof check - Closes #2172.
1er avril 2013, par blueimpm js/jquery.fileupload.js
Use a cross-frame compatible instanceof check - Closes #2172.
Also see
http://perfectionkills.com/instanceof-considered-harmful-or-how-to-writea-robust-isarray/