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Autres articles (54)
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Configurer la prise en compte des langues
15 novembre 2010, parAccéder à la configuration et ajouter des langues prises en compte
Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...) -
Soumettre améliorations et plugins supplémentaires
10 avril 2011Si vous avez développé une nouvelle extension permettant d’ajouter une ou plusieurs fonctionnalités utiles à MediaSPIP, faites le nous savoir et son intégration dans la distribution officielle sera envisagée.
Vous pouvez utiliser la liste de discussion de développement afin de le faire savoir ou demander de l’aide quant à la réalisation de ce plugin. MediaSPIP étant basé sur SPIP, il est également possible d’utiliser le liste de discussion SPIP-zone de SPIP pour (...) -
Support de tous types de médias
10 avril 2011Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)
Sur d’autres sites (4644)
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avformat : Print "Consider increasing the value for analzeduration and probesize"...
20 juin 2013, par Carl Eugen Hoyosavformat : Print "Consider increasing the value for analzeduration and probesize" even more often
The sample from ticket #2691 currently does not trigger "Consider increasing
the value for analzeduration and probesize" because the audio streams are
only added after calling estimate_timings(). Attached patch moves the message
below this function call.Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
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Revert "avcodec/opus_parser : Handle complete frames flag."
23 août 2018, par James AlmerRevert "avcodec/opus_parser : Handle complete frames flag."
This reverts commit 7e0df5910ec0f107cd0700d6b9359d29177f1933.
"complete frames" containers, even if they don't need to assemble
packets, still depended on this code for proper packet duration and
timestamp generation. -
FFmpeg : "filter_complex" results in worse quality than "vf"
16 novembre 2016, par DasmowenatorI’m trying to use FFmpeg to do some complex video transcoding (such as concatenating multiple files). To do this, I’ve been trying to use the filter_complex, but I’ve noticed a slight drop in quality from what I saw earlier using the normal video filter.
To double-check, I boiled down my command to a simple transcode — one using filter_complex and one just using the vf — and I’ve confirmed that the output of the complex filter is noticeably blurry compared to the output of the normal video filter. I can’t find any FFmpeg documentation explaining this... does anyone know why this is happening and how I can get filter_complex to output the same quality video as vf ?
Command using the normal video filter (vf) :
ffmpeg -i input.ts -map_chapters -1 -f mpegts -an -sn -map 0:0 -vf "[in]yadif=deint=interlaced[out]" -vcodec libx264 -profile:v baseline -level 2 -b:v 800k output.tsFFmpeg Output :
ffmpeg version 3.0 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.1.2 (GCC) 20070626 (Red Hat 4.1.2-14)
configuration: --enable-gpl --enable-nonfree --enable-libx264 --enable-libfdk-aac --enable-libfaac --enable-libvpx --enable-encoder=vorbis --enable-libvorbis --enable-libmp3lame --enable-libspeex --disable-decoder=prores --disable-decoder=prores_lgpl --disable-ffplay --disable-ffserver --disable-shared --enable-static --extra-cflags=-I/local/build/include --extra-libs=-lfdk-aac --extra-ldflags=-L/local/build/lib --prefix=/local/build/install
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'clip01.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.41.100
Duration: 00:00:10.02, start: 0.023220, bitrate: 741 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 854x480 [SAR 1:1 DAR 427:240], 604 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
[libx264 @ 0x138a99e0] No 608/708 caption insertion into sei user data.
[libx264 @ 0x138a99e0] using SAR=1/1
[libx264 @ 0x138a99e0] frame MB size (54x30) > level limit (396)
[libx264 @ 0x138a99e0] MB rate (48600) > level limit (11880)
[libx264 @ 0x138a99e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
[libx264 @ 0x138a99e0] profile Constrained Baseline, level 2.0
Output #0, mpegts, to 'output.ts':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.25.100
Stream #0:0(und): Video: h264 (libx264), yuv420p, 854x480 [SAR 1:1 DAR 427:240], q=-1--1, 800 kb/s, 30 fps, 90k tbn, 30 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc57.24.102 libx264
Side data:
unknown side data type 10 (24 bytes)
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
frame= 300 fps=179 q=-1.0 Lsize= 1059kB time=00:00:10.03 bitrate= 864.9kbits/s speed= 6x
video:949kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 11.660099%
[libx264 @ 0x138a99e0] frame I:2 Avg QP:23.16 size: 26978
[libx264 @ 0x138a99e0] frame P:298 Avg QP:23.09 size: 3079
[libx264 @ 0x138a99e0] mb I I16..4: 44.3% 0.0% 55.7%
[libx264 @ 0x138a99e0] mb P I16..4: 1.1% 0.0% 0.5% P16..4: 28.7% 8.4% 2.1% 0.0% 0.0% skip:59.3%
[libx264 @ 0x138a99e0] final ratefactor: 22.63
[libx264 @ 0x138a99e0] coded y,uvDC,uvAC intra: 30.8% 62.8% 23.0% inter: 7.2% 14.8% 0.3%
[libx264 @ 0x138a99e0] i16 v,h,dc,p: 25% 39% 11% 24%
[libx264 @ 0x138a99e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 29% 16% 5% 6% 7% 6% 4% 5%
[libx264 @ 0x138a99e0] i8c dc,h,v,p: 45% 29% 18% 8%
[libx264 @ 0x138a99e0] kb/s:777.19Command using the complex filter :
ffmpeg -i input.ts -map_chapters -1 -f mpegts -filter_complex "[0:v:0]yadif=deint=interlaced[v0];[v0]concat=n=1:v=1:a=0[cat_v]" -an -sn -map "[cat_v]" -vcodec libx264 -profile:v baseline -level 2 -b:v 800k output.tsFFmpeg Output :
ffmpeg version 3.0 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.1.2 (GCC) 20070626 (Red Hat 4.1.2-14)
configuration: --enable-gpl --enable-nonfree --enable-libx264 --enable-libfdk-aac --enable-libfaac --enable-libvpx --enable-encoder=vorbis --enable-libvorbis --enable-libmp3lame --enable-libspeex --disable-decoder=prores --disable-decoder=prores_lgpl --disable-ffplay --disable-ffserver --disable-shared --enable-static --extra-cflags=-I/local/build/include --extra-libs=-lfdk-aac --extra-ldflags=-L/local/build/lib --prefix=/local/build/install
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'clip01.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.41.100
Duration: 00:00:10.02, start: 0.023220, bitrate: 741 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 854x480 [SAR 1:1 DAR 427:240], 604 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
[libx264 @ 0x81f5200] No 608/708 caption insertion into sei user data.
[libx264 @ 0x81f5200] using SAR=1/1
[libx264 @ 0x81f5200] frame MB size (54x30) > level limit (396)
[libx264 @ 0x81f5200] MB rate (48600) > level limit (11880)
[libx264 @ 0x81f5200] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
[libx264 @ 0x81f5200] profile Constrained Baseline, level 2.0
Output #0, mpegts, to 'output.ts':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.25.100
Stream #0:0: Video: h264 (libx264), yuv420p, 854x480 [SAR 1:1 DAR 427:240], q=-1--1, 800 kb/s, 30 fps, 90k tbn, 30 tbc (default)
Metadata:
encoder : Lavc57.24.102 libx264
Side data:
unknown side data type 10 (24 bytes)
Stream mapping:
Stream #0:0 (h264) -> yadif
concat -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
frame= 300 fps=179 q=-1.0 Lsize= 1059kB time=00:00:10.03 bitrate= 864.9kbits/s speed= 6x
video:949kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 11.660099%
[libx264 @ 0x81f5200] frame I:2 Avg QP:23.16 size: 26978
[libx264 @ 0x81f5200] frame P:298 Avg QP:23.09 size: 3079
[libx264 @ 0x81f5200] mb I I16..4: 44.3% 0.0% 55.7%
[libx264 @ 0x81f5200] mb P I16..4: 1.1% 0.0% 0.5% P16..4: 28.7% 8.4% 2.1% 0.0% 0.0% skip:59.3%
[libx264 @ 0x81f5200] final ratefactor: 22.63
[libx264 @ 0x81f5200] coded y,uvDC,uvAC intra: 30.8% 62.8% 23.0% inter: 7.2% 14.8% 0.3%
[libx264 @ 0x81f5200] i16 v,h,dc,p: 25% 39% 11% 24%
[libx264 @ 0x81f5200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 29% 16% 5% 6% 7% 6% 4% 5%
[libx264 @ 0x81f5200] i8c dc,h,v,p: 45% 29% 18% 8%
[libx264 @ 0x81f5200] kb/s:777.19
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