
Recherche avancée
Médias (1)
-
La conservation du net art au musée. Les stratégies à l’œuvre
26 mai 2011
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (62)
-
Les vidéos
21 avril 2011, parComme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...) -
Installation en mode ferme
4 février 2011, parLe mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
C’est la méthode que nous utilisons sur cette même plateforme.
L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...) -
Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
Sur d’autres sites (7159)
-
build : Add missing build rules for the ISMV muxer
10 juillet 2012, par Diego Biurrunbuild : Add missing build rules for the ISMV muxer
-
build : change checkheaders to use regular build rules
7 août 2012, par Mans Rullgardbuild : change checkheaders to use regular build rules
-
How do I initialize multiple libffmpeg contexts in multiple threads and convert the video stream of multiple IP cameras into jpeg image ?
10 juillet 2017, par hipittAccess to multiple IP cameras, and the resolution of each network camera may be different, now I need to decode the video stream of each camera with LIBFFMPEG and convert it into JPG picture (the video stream is H264 encoded). Can I use multi threading, each thread to initialize (instantiate) a LIBFFMPEG context to decode ? Or what should I do ? use multi processes ?
The two thread initializes the two ffmpeg context crash
[h264 @ 0x7f1a08000a60] no frame!
[2017-07-10 09:52:58,443 WARN ] H264 Error while decoding for send frame: 0 0 0 1
[h264 @ 0x7f1a08000a60] non-existing PPS 0 referenced
[h264 @ 0x7f1a08000a60] [2017-07-10 09:52:58,444 ERROR] Signal caught:11, dumping backtrace...
decode_slice_header error
[h264 @ 0x7f1a08000a60] no frame!
[2017-07-10 09:52:58,444 WARN ] H264 Error while decoding for send frame: 0 0 0 1
[h264 @ 0x7f1a08000a60] non-existing PPS 0 referenced
[h264 @ 0x7f1a08000a60] decode_slice_header error
[h264 @ 0x7f1a08000a60] no frame!
[2017-07-10 09:52:58,444 WARN ] H264 Error while decoding for send frame: 0 0 0 1
[h264 @ 0x7f1a08000a60] non-existing PPS 0 referenced
[h264 @ 0x7f1a08000a60] decode_slice_header error
[h264 @ 0x7f1a08000a60] no frame!
[2017-07-10 09:52:58,445 WARN ] H264 Error while decoding for send frame: 0 0 0 1
[h264 @ 0x7f1a08000a60] non-existing PPS 0 referenced
[h264 @ 0x7f1a08000a60] decode_slice_header error
[h264 @ 0x7f1a08000a60] no frame!
[2017-07-10 09:52:58,445 WARN ] H264 Error while decoding for send frame: 0 0 0 1
[h264 @ 0x7f1a08000a60] non-existing PPS 0 referenced
[h264 @ 0x7f1a08000a60] decode_slice_header error
[h264 @ 0x7f1a08000a60] no frame!
[2017-07-10 09:52:58,445 WARN ] H264 Error while decoding for send frame: 0 0 0 1
[h264 @ 0x7f1a08000a60] non-existing PPS 0 referenced
[h264 @ 0x7f1a08000a60] decode_slice_header error
[h264 @ 0x7f1a08000a60] no frame!
[2017-07-10 09:52:58,446 WARN ] H264 Error while decoding for send frame: 0 0 0 1
[h264 @ 0x7f1a08000a60] non-existing PPS 0 referenced
[h264 @ 0x7f1a08000a60] decode_slice_header error
[h264 @ 0x7f1a08000a60] no frame!
[2017-07-10 09:52:58,446 WARN ] H264 Error while decoding for send frame: 0 0 0 1
[h264 @ 0x7f1a08000a60] non-existing PPS 0 referenced
[h264 @ 0x7f1a08000a60] decode_slice_header error
[h264 @ 0x7f1a08000a60] no frame!
[2017-07-10 09:52:58,446 WARN ] H264 Error while decoding for send frame: 0 0 0 1
*** Error in `./camera-stream': corrupted size vs. prev_size: 0x00007f1a0801cbc0 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x777e5)[0x7f1a4a6877e5]
/lib/x86_64-linux-gnu/libc.so.6(+0x82aec)[0x7f1a4a692aec]
/lib/x86_64-linux-gnu/libc.so.6(__libc_malloc+0x54)[0x7f1a4a694184]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(_Znwm+0x18)[0x7f1a4af86e78]
/compile/lib/liblog4cxx.so.10(+0x14f34d)[0x7f1a4c99a34d]
/compile/lib/liblog4cxx.so.10(_ZN7log4cxx7rolling27RollingFileAppenderSkeleton9subAppendERKNS_7helpers10ObjectPtrTINS_3spi12LoggingEventEEERNS2_4PoolE+0x67)[0x7f1a4c99b707]
/compile/lib/liblog4cxx.so.10(_ZN7log4cxx16AppenderSkeleton8doAppendERKNS_7helpers10ObjectPtrTINS_3spi12LoggingEventEEERNS1_4PoolE+0x222)[0x7f1a4c92a692]
/compile/lib/liblog4cxx.so.10(_ZN7log4cxx7helpers22AppenderAttachableImpl21appendLoopOnAppendersERKNS0_10ObjectPtrTINS_3spi12LoggingEventEEERNS0_4PoolE+0x3f)[0x7f1a4c92838f]
/compile/lib/liblog4cxx.so.10(_ZNK7log4cxx6Logger13callAppendersERKNS_7helpers10ObjectPtrTINS_3spi12LoggingEventEEERNS1_4PoolE+0xe8)[0x7f1a4c970058]
/compile/lib/liblog4cxx.so.10(_ZNK7log4cxx6Logger9forcedLogERKNS_7helpers10ObjectPtrTINS_5LevelEEERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKNS_3spi12LocationInfoE+0xbe)[0x7f1a4c9702ae]
./camera-stream(_Z10handleCorei+0x2ca)[0x62fa17]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f1a4b4ae390]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x22)[0x7f1a4a694512]
./camera-stream(av_fast_padded_malloc+0x78)[0xa692d8]
./camera-stream(ff_h2645_extract_rbsp+0x131)[0xd68591]
./camera-stream(ff_h2645_packet_split+0x204)[0xd689d4]
./camera-stream[0x7dd357]
./camera-stream(avcodec_decode_video2+0x184)[0xa6bf74]
./camera-stream[0xa6cd50]
./camera-stream(avcodec_send_packet+0xb8)[0xa71a38]
./camera-stream(_ZN11H264Capture6decodeEPhiRN2cv3MatE+0x98)[0x637fe6]
./camera-stream(_ZN7Capture13face_work_funEv+0x532)[0x630944]
./camera-stream(_ZN7Capture15face_thread_funEPv+0x20)[0x63040a]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7f1a4b4a46ba]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f1a4a7173dd]