Recherche avancée
Autres articles (27)
-
Creating farms of unique websites
13 avril 2011, parMediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...) -
Keeping control of your media in your hands
13 avril 2011, parThe vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...) -
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 (3438)
-
ffmpeg not setting GOP size for x264
5 juillet 2012, par Chris RobinsonCan someone please explain to me why the following settings :
ffmpeg -i test.avi -vcodec libx264 -g 2 -keyint_min 1 -sc_threshold 100000000 -bf 1 test.mp4produces the following output :
ffmpeg version N-41668-g564bb24 Copyright (c) 2000-2012 the FFmpeg developers
built on Jun 17 2012 20:18:05 with gcc 4.6.3
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --ena libavutil 51. 58.100 / 51. 58.100
libavcodec 54. 25.100 / 54. 25.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 81.100 / 2. 81.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
Input #0, avi, from 'test.avi':
Metadata:
encoder : Lavf54.6.101
Duration: 00:00:01.70, start: 0.000000, bitrate: 4258 kb/s
Stream #0:0: Video: mpeg4 (Simple Profile) (DIVX / 0x58564944), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 29.97 tbn, 30k tbc
Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16, 128 kb/s
[buffer @ 0000000004115600] w:1280 h:720 pixfmt:yuv420p tb:1001/30000 fr:30000/1001 sar:1/1 sws_param:flags=2
[ffmpeg_buffersink @ 00000000041157a0] No opaque field provided
[libx264 @ 000000000411f120] using SAR=1/1
[libx264 @ 000000000411f120] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
[libx264 @ 000000000411f120] profile High, level 3.1
[libx264 @ 000000000411f120] 264 - core 125 r2200 999b753 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=36 lookahead_threads=6 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keOutput #0, mp4, to 'test.mp4':
Metadata:
encoder : Lavf54.6.101
Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 30k tbn, 29.97 tbc
Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (mpeg4 -> libx264)
Stream #0:1 -> #0:1 (mp3 -> libvo_aacenc)
Press [q] to stop, [?] for help
[libvo_aacenc @ 0000000001ebe240] Que input is backward in time
Last message repeated 8 times
frame= 35 fps=0.0 q=-1.0 Lsize= 466kB time=00:00:01.10 bitrate=3466.6kbits/s dup=1 drop=0
video:436kB audio:28kB global headers:0kB muxing overhead 0.558509%
[libx264 @ 000000000411f120] frame I:1 Avg QP:24.93 size: 92398
[libx264 @ 000000000411f120] frame P:28 Avg QP:26.82 size: 12010
[libx264 @ 000000000411f120] frame B:6 Avg QP:30.37 size: 2764
[libx264 @ 000000000411f120] consecutive B-frames: 74.3% 5.7% 8.6% 11.4%
[libx264 @ 000000000411f120] mb I I16..4: 41.5% 40.1% 18.4%
[libx264 @ 000000000411f120] mb P I16..4: 3.9% 1.4% 0.6% P16..4: 14.3% 4.7% 3.2% 0.0% 0.0% skip:72.0%
[libx264 @ 000000000411f120] mb B I16..4: 1.1% 0.4% 0.1% B16..8: 14.2% 2.8% 0.6% direct: 1.1% skip:79.8% L0:49.8% L1:39.5% BI:10.8%
[libx264 @ 000000000411f120] 8x8 transform intra:29.9% inter:76.4%
[libx264 @ 000000000411f120] coded y,uvDC,uvAC intra: 31.1% 34.4% 18.7% inter: 10.2% 6.3% 3.0%
[libx264 @ 000000000411f120] i16 v,h,dc,p: 62% 34% 3% 0%
[libx264 @ 000000000411f120] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 23% 38% 4% 4% 3% 3% 2% 5%
[libx264 @ 000000000411f120] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 40% 35% 16% 1% 2% 2% 1% 1% 1%
[libx264 @ 000000000411f120] i8c dc,h,v,p: 52% 20% 24% 3%
[libx264 @ 000000000411f120] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 000000000411f120] ref P L0: 70.5% 10.1% 12.1% 7.3%
[libx264 @ 000000000411f120] ref B L0: 81.1% 16.9% 2.0%
[libx264 @ 000000000411f120] ref B L1: 89.7% 10.3%
[libx264 @ 000000000411f120] kb/s:3050.18Why am I not getting an I-Frame every second frame ? Is there something else I can set to do enforce this ? If not, can you suggest how to do this using the
mpeg4codec. It's vital that I can extract what type of frame has been encoded during the encoding process and that I can set a specific GOP structure. -
ffmpeg not setting GOP size for x264
5 juillet 2012, par Chris RobinsonCan someone please explain to me why the following settings :
ffmpeg -i test.avi -vcodec libx264 -g 2 -keyint_min 1 -sc_threshold 100000000 -bf 1 test.mp4produces the following output :
ffmpeg version N-41668-g564bb24 Copyright (c) 2000-2012 the FFmpeg developers
built on Jun 17 2012 20:18:05 with gcc 4.6.3
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --ena libavutil 51. 58.100 / 51. 58.100
libavcodec 54. 25.100 / 54. 25.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 81.100 / 2. 81.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
Input #0, avi, from 'test.avi':
Metadata:
encoder : Lavf54.6.101
Duration: 00:00:01.70, start: 0.000000, bitrate: 4258 kb/s
Stream #0:0: Video: mpeg4 (Simple Profile) (DIVX / 0x58564944), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 29.97 tbn, 30k tbc
Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16, 128 kb/s
[buffer @ 0000000004115600] w:1280 h:720 pixfmt:yuv420p tb:1001/30000 fr:30000/1001 sar:1/1 sws_param:flags=2
[ffmpeg_buffersink @ 00000000041157a0] No opaque field provided
[libx264 @ 000000000411f120] using SAR=1/1
[libx264 @ 000000000411f120] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
[libx264 @ 000000000411f120] profile High, level 3.1
[libx264 @ 000000000411f120] 264 - core 125 r2200 999b753 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=36 lookahead_threads=6 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keOutput #0, mp4, to 'test.mp4':
Metadata:
encoder : Lavf54.6.101
Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 30k tbn, 29.97 tbc
Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (mpeg4 -> libx264)
Stream #0:1 -> #0:1 (mp3 -> libvo_aacenc)
Press [q] to stop, [?] for help
[libvo_aacenc @ 0000000001ebe240] Que input is backward in time
Last message repeated 8 times
frame= 35 fps=0.0 q=-1.0 Lsize= 466kB time=00:00:01.10 bitrate=3466.6kbits/s dup=1 drop=0
video:436kB audio:28kB global headers:0kB muxing overhead 0.558509%
[libx264 @ 000000000411f120] frame I:1 Avg QP:24.93 size: 92398
[libx264 @ 000000000411f120] frame P:28 Avg QP:26.82 size: 12010
[libx264 @ 000000000411f120] frame B:6 Avg QP:30.37 size: 2764
[libx264 @ 000000000411f120] consecutive B-frames: 74.3% 5.7% 8.6% 11.4%
[libx264 @ 000000000411f120] mb I I16..4: 41.5% 40.1% 18.4%
[libx264 @ 000000000411f120] mb P I16..4: 3.9% 1.4% 0.6% P16..4: 14.3% 4.7% 3.2% 0.0% 0.0% skip:72.0%
[libx264 @ 000000000411f120] mb B I16..4: 1.1% 0.4% 0.1% B16..8: 14.2% 2.8% 0.6% direct: 1.1% skip:79.8% L0:49.8% L1:39.5% BI:10.8%
[libx264 @ 000000000411f120] 8x8 transform intra:29.9% inter:76.4%
[libx264 @ 000000000411f120] coded y,uvDC,uvAC intra: 31.1% 34.4% 18.7% inter: 10.2% 6.3% 3.0%
[libx264 @ 000000000411f120] i16 v,h,dc,p: 62% 34% 3% 0%
[libx264 @ 000000000411f120] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 23% 38% 4% 4% 3% 3% 2% 5%
[libx264 @ 000000000411f120] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 40% 35% 16% 1% 2% 2% 1% 1% 1%
[libx264 @ 000000000411f120] i8c dc,h,v,p: 52% 20% 24% 3%
[libx264 @ 000000000411f120] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 000000000411f120] ref P L0: 70.5% 10.1% 12.1% 7.3%
[libx264 @ 000000000411f120] ref B L0: 81.1% 16.9% 2.0%
[libx264 @ 000000000411f120] ref B L1: 89.7% 10.3%
[libx264 @ 000000000411f120] kb/s:3050.18Why am I not getting an I-Frame every second frame ? Is there something else I can set to do enforce this ? If not, can you suggest how to do this using the
mpeg4codec. It's vital that I can extract what type of frame has been encoded during the encoding process and that I can set a specific GOP structure. -
avconv : Saving MP4 is Taking Hours
4 septembre 2015, par PeregrineStudiosnot entirely sure if I should post this on askubuntu or stackoverflow. Posted on askubuntu and not getting any answers. I’m hoping I can find an answer here.
I’m setting up a website where users can upload videos and share them. I’m using avconv to reduce the video size and save it twice, once as an mp4 and again as a webm.
Uploading a .MOV from a phone, the video conversion is quick and manageable.
Uploading a .mp4 from a Samsung Galaxy S3, the video conversion to webm is also quick. But, the conversion to another mp4 takes FOREVER - literally hours. Why ? Is anyone able to shed light on the problem ?
My avconv output is below.
avconv -i /var/www/dev_jackpine/ottawa2017/temp_videos/37a949071acaee714dae829ca8df9b29.mp4 -c:v libx264 -vf transpose=1,transpose=1,transpose=1 -s 640x480 /var/www/dev_jackpine/ottawa2017/spinnies/test.mp4
avconv version 0.8.17-4:0.8.17-0ubuntu0.12.04.1, Copyright (c) 2000-2014 the Libav developers
built on Mar 16 2015 13:26:50 with gcc 4.6.3
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/dev_jackpine/ottawa2017/temp_videos/37a949071acaee714dae829ca8df9b29.mp4':
Metadata:
major_brand : isom
minor_version : 0
compatible_brands: isom3gp4
creation_time : 2015-09-04 15:08:21
Duration: 00:00:07.76, start: 0.000000, bitrate: 11756 kb/s
Stream #0.0(eng): Video: h264 (Constrained Baseline), yuv420p, 1280x720, 11967 kb/s, 29.81 fps, 90k tbr, 90k tbn, 180k tbc
Metadata:
creation_time : 2015-09-04 15:08:21
Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 119 kb/s
Metadata:
creation_time : 2015-09-04 15:08:21
File '/var/www/dev_jackpine/ottawa2017/spinnies/test.mp4' already exists. Overwrite ? [y/N] y
[buffer @ 0xc3d580] w:1280 h:720 pixfmt:yuv420p
[scale @ 0xc3dac0] w:1280 h:720 fmt:yuv420p -> w:640 h:480 fmt:yuv420p flags:0x4
[transpose @ 0xc3e280] w:640 h:480 dir:1 -> w:480 h:640 rotation:clockwise vflip:0
[transpose @ 0xc3e7c0] w:480 h:640 dir:1 -> w:640 h:480 rotation:clockwise vflip:0
[transpose @ 0xc3ede0] w:640 h:480 dir:1 -> w:480 h:640 rotation:clockwise vflip:0
[libx264 @ 0xc2b100] MB rate (108000000) > level limit (983040)
[libx264 @ 0xc2b100] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
[libx264 @ 0xc2b100] profile Main, level 5.1
[libx264 @ 0xc2b100] 264 - core 120 r2151 a3f4407 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=0 open_gop=1 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.25 aq=1:1.00
Output #0, mp4, to '/var/www/dev_jackpine/ottawa2017/spinnies/test.mp4':
Metadata:
major_brand : isom
minor_version : 0
compatible_brands: isom3gp4
creation_time : 2015-09-04 15:08:21
encoder : Lavf53.21.1
Stream #0.0(eng): Video: libx264, yuv420p, 480x640, q=-1--1, 180k tbn, 90k tbc
Metadata:
creation_time : 2015-09-04 15:08:21
Stream #0.1(eng): Audio: libvo_aacenc, 48000 Hz, stereo, s16, 200 kb/s
Metadata:
creation_time : 2015-09-04 15:08:21
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> libx264)
Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
Press ctrl-c to stop encodingHere’s an example frame output :
frame=124398 fps=142 q=33.0 size= 16885kB time=1.38 bitrate=100110.2kbits/s dup=124356 drop=0I’ve had the process running the whole time I’ve been writing this question, and so far it’s done... 22 frames.
What could be the problem ?
Syndiquer tout le site
