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Médias (1)
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The Slip - Artworks
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Texte
Autres articles (25)
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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 (...) -
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) (...)
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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 (5964)
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avformat/hlsenc : save the EXT-X-DISCONTINUITY from old list
7 décembre 2016, par Steven Liuavformat/hlsenc : save the EXT-X-DISCONTINUITY from old list
when use fix ticket 2nd problem.
command line test step :
rm -rf output* ;./ffmpeg -i /Movies/objectC/facebook.mp4 -an -c:v copy
f hls -hls_time 4 -hls_list_size 5 -hls_flags +delete_segments
hls_flags +append_list -hls_flags +omit_endlist -hls_flags
+discont_start -t 50 output.m3u8
./ffmpeg -i /Movies/objectC/facebook.mp4 -an -c:v libx264 -g 4 -f hls hls_time 4 -hls_list_size 5 -hls_flags +delete_segments -hls_flags
+append_list -hls_flags +omit_endlist -hls_flags +discont_start -t 5
output.m3u8
./ffmpeg -i /Movies/objectC/facebook.mp4 -an -c:v libx264 -g 4 -f hls hls_time 4 -hls_list_size 5 -hls_flags +delete_segments -hls_flags
+append_list -hls_flags +omit_endlist -hls_flags +discont_start -t 5
output.m3u8result :
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:5
#EXT-X-MEDIA-SEQUENCE:6
#EXTINF:4.120000,
output6.ts
#EXT-X-DISCONTINUITY
#EXTINF:4.000000,
output7.ts
#EXTINF:0.960000,
output8.ts
#EXT-X-DISCONTINUITY
#EXTINF:4.000000,
output9.ts
#EXTINF:0.960000,
output10.tsSigned-off-by : Steven Liu <lq@chinaffmpeg.org>
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Adding the Transform video filter to ffmpeg
1er août 2016, par aaeimfirst off I’m new to ffmpeg, and stackoverflow. so sorry If I’m doing something wrong.
Earlier I commented on a post related to this but it got deleted because it was not an answer or something. So I’m asking my own question here.
I followed this instructions https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu
up untill Unzipping the ffmpeg file. Then I followed the facebook instructions
- Checkout the source for ffmpeg
- Copy vf_transform.c to the libavfilter subdirectory in ffmpeg source
- Edit libavfilter/allfilters.c and register the filter by adding the line : REGISTER_FILTER(TRANSFORM, transform, vf) ; in the video filter registration section
- Edit libavfilter/Makefile and add the filter to adding the line : OBJS-$(CONFIG_TRANSFORM_FILTER) += vf_transform.o in the filter section
- Configure and build ffmpeg as usual
and finally I ran the remaining instructions from the compilation guide.
I did the whole process a couple times but The result is always the same when I try to test.
ffmpeg version N-80901-gfebc862 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab
libavutil 55. 28.100 / 55. 28.100
libavcodec 57. 48.101 / 57. 48.101
libavformat 57. 41.100 / 57. 41.100
libavdevice 57. 0.102 / 57. 0.102
libavfilter 6. 47.100 / 6. 47.100
libavresample 3. 0. 0 / 3. 0. 0
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 1.100 / 2. 1.100
libpostproc 54. 0.100 / 54. 0.100
Unknown filter 'transform'.I’m on elementary OS.
Thx and sorry if the post is all wrong. -
How to play avi files on browser
31 janvier 2017, par mvalencaaMy team needs to develop a system that plays avi files on the web. These files are recorded by a hardware whose firmware we don’t have access to. We are trying to negotiate it with the manufacturer to change the file format to mp4, but until now we have nothing.
Because of this, we are trying another manners to make it work. Our first attempt was to use FFMPEG to convert the files to mp4 (or webm or ogg), but this process takes too long because we have to do it everyday with a really huge amount of videos.
We also tried to use FFMPEG’s copy command (which is much faster), but the video always crashes at some point (mainly when we need to navigate in its timeline) and we don’t know why.
So now we are thinking to customize videojs flash player to reproduce the AVI files, but because we don’t have too much experience with video programming and flash, we don’t know if this is possible. Is it possible to write a decoder in action script to read avi files ?
I saw that Youtube and Facebook can play AVI files... How do they do this ? I have already looked a lot about it, but had no success.
EDIT 1
avi video file before copy command :
$ ffmpeg -i video.avi
ffmpeg version N-82324-g872b358 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.4.0 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dx va2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-lib ebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --ena ble-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfree type --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enab le-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-lib openh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschr oedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheor a --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvo rbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --ena ble-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --e nable-decklink --enable-zlib
libavutil 55. 36.100 / 55. 36.100
libavcodec 57. 66.101 / 57. 66.101
libavformat 57. 57.100 / 57. 57.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 66.100 / 6. 66.100
libswscale 4. 3.100 / 4. 3.100
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Input #0, avi, from 'video.avi':
Metadata:
encoder :
Duration: 00:50:07.67, start: 0.000000, bitrate: 6 kb/s
Stream #0:0: Video: h264 (Constrained Baseline) (H264 / 0x34363248), yuv420p (progressive), 352x240, 3 fps, 3 tbr, 3 tbn, 6 tbc
At least one output file must be specifiedcopy command (with no audio stream because the videos don’t have it) :
$ ffmpeg -i video.avi -vcodec copy video.mp4
ffmpeg version N-82324-g872b358 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.4.0 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
libavutil 55. 36.100 / 55. 36.100
libavcodec 57. 66.101 / 57. 66.101
libavformat 57. 57.100 / 57. 57.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 66.100 / 6. 66.100
libswscale 4. 3.100 / 4. 3.100
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Input #0, avi, from 'video.avi':
Metadata:
encoder :
Duration: 00:50:07.67, start: 0.000000, bitrate: 6 kb/s
Stream #0:0: Video: h264 (Constrained Baseline) (H264 / 0x34363248), yuv420p(progressive), 352x240, 3 fps, 3 tbr, 3 tbn, 6 tbc
Output #0, mp4, to 'video.mp4':
Metadata:
encoder : Lavf57.57.100
Stream #0:0: Video: h264 (Constrained Baseline) ([33][0][0][0] / 0x0021), yuv420p(progressive), 352x240, q=2-31, 3 fps, 3 tbr, 12288 tbn, 3 tbc
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[mp4 @ 0000000002513fc0] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
[NULL @ 0000000002524020] missing picture in access unit with size 16
Last message repeated 300 times
frame= 9324 fps=0.0 q=-1.0 Lsize= 1388kB time=01:38:27.66 bitrate= 1.9kbits/s speed=3.32e+004x
video:1354kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.493988%mp4 video file after copy command :
$ ffmpeg -i video.mp4
ffmpeg version N-82324-g872b358 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.4.0 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dx va2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-lib ebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --ena ble-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfree type --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enab le-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-lib openh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschr oedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheor a --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvo rbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --ena ble-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --e nable-decklink --enable-zlib
libavutil 55. 36.100 / 55. 36.100
libavcodec 57. 66.101 / 57. 66.101
libavformat 57. 57.100 / 57. 57.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 66.100 / 6. 66.100
libswscale 4. 3.100 / 4. 3.100
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.57.100
Duration: 01:38:28.00, start: 0.000000, bitrate: 1 kb/s
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yu v420p, 352x240, 1 kb/s, 1.58 fps, 3 tbr, 12288 tbn, 24576 tbc (default)
Metadata:
handler_name : VideoHandler
At least one output file must be specifiedEDIT 2
I uploaded two little samples if somebody wants to test :
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