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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (109)
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L’agrémenter visuellement
10 avril 2011MediaSPIP est basé sur un système de thèmes et de squelettes. Les squelettes définissent le placement des informations dans la page, définissant un usage spécifique de la plateforme, et les thèmes l’habillage graphique général.
Chacun peut proposer un nouveau thème graphique ou un squelette et le mettre à disposition de la communauté. -
Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs
12 avril 2011, parLa manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras. -
Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP automatically converts uploaded files to internet-compatible formats.
Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
All uploaded files are stored online in their original format, so you can (...)
Sur d’autres sites (12376)
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FFMPEG Cutting Commercials puts audio out of sync
11 septembre 2014, par JaBbAUbuntu 14.04.1 with the real ffmpeg loaded (same problem with the avconv version).
I’m trying to take files created in MythTV with a HDPVR, cut the commercials and put the video into an MP4 container for use with MythRoku.
the command
ffmpeg -i $file -acodec copy -vcodec copy -f mp4 file.mp4Works fine. Once I update the database, I can watch the file in MythRoku or Plex.
However, when I try to cut out the commercials, the audio gets out of sync by just over 1 second (audio delayed) whenever I cut past the 0 mark. Totem Video player and VLC both play the resulting video fine, but I can see a "hitch" at the beginning while they are syncing the audio, so I know the information on the audio sync is in the file somewhere. Mythroku and Plex both are out of sync when playing the file. The MythTV Frontend player actually does play it correctly, and I can hear the "hitch" as it syncs the audio.
After hours of reading posts and playing with settings, I’ve got it down to this :
If I say :
ffmpeg -i $file -acodec copy -vcodec copy -f mp4 -ss 0 -t <anything> out.mp4</anything>The file is fine, plays both locally and in MythRoku/Plex
But if I advance the start any amount - even 1 second - audio is out of sync
ffmpeg -i $file -acodec copy -vcodec copy -f mp4 -ss 1 -t <anything> out.mp4</anything>I’ve tried splitting the video (as mp4) and audio (as ac3) first, splitting them separately, and then putting them back together as the last step, but I get the same results.
The information is in the file - Totem, VLC and the Frontend all can figure it out. How can I get ffmpeg to figure out the sync and write the file so it’s correct ?
Original file :
mythtv@marvin:~$ mediainfo /var/lib/mythtv/recordings/2225_20140824001500.mpg
General
ID : 0 (0x0)
Complete name : /var/lib/mythtv/recordings/2225_20140824001500.mpg
Format : MPEG-TS
File size : 4.03 GiB
Duration : 1h 45mn
Overall bit rate mode : Variable
Overall bit rate : 5 491 Kbps
Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=4, N=32
Codec ID : 27
Duration : 1h 45mn
Bit rate mode : Variable
Bit rate : 4 831 Kbps
Maximum bit rate : 20.0 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 59.940 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.087
Stream size : 3.55 GiB (88%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : 129
Duration : 1h 45mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -6ms
Stream size : 289 MiB (7%)File cut from 0 :
mythtv@marvin:~$ mediainfo 2225_20140824001500_1.mp4
General
Complete name : 2225_20140824001500_1.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 58.5 MiB
Duration : 1mn 45s
Overall bit rate mode : Variable
Overall bit rate : 4 676 Kbps
Writing application : Lavf54.63.104
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=4, N=32
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 45s
Bit rate mode : Variable
Bit rate : 4 281 Kbps
Maximum bit rate : 20.0 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 59.940 fps
Minimum frame rate : 59.920 fps
Maximum frame rate : 59.960 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.077
Stream size : 53.6 MiB (92%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : ac-3
Duration : 1mn 45s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 4.81 MiB (8%)File cut from 1 second with audio sync problem :
mythtv@marvin:~$ mediainfo 2225_20140824001500_2.mp4
General
Complete name : 2225_20140824001500_2.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 68.0 MiB
Duration : 2mn 0s
Overall bit rate mode : Variable
Overall bit rate : 4 750 Kbps
Writing application : Lavf54.63.104
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=4, N=32
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 58s
Bit rate mode : Variable
Bit rate : 4 394 Kbps
Maximum bit rate : 20.0 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 59.940 fps
Minimum frame rate : 59.920 fps
Maximum frame rate : 59.960 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.080
Stream size : 62.3 MiB (92%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : ac-3
Duration : 2mn 0s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 5.49 MiB (8%) -
HTML5 - ffmpeg encoded x264 video fails to play in Chrome/IE
11 août 2014, par Saren ArteriusI have totally no idea why http://jiro.wtako.net/video/39 does work in all browsers while http://jiro.wtako.net/video/40 only works in Firefox.
1 is encoded by MediaCoder (x264 + Nero encoder) and 2 is encoded by Arch Linux ffmpeg.
ffmpeg version :
ffmpeg 1:2.3.1-1x264 version :
libx264 1:142.20140311-6It seems that video size, frame rate, profile, level, bitrate does not affect whether the video can be played, because I have tried all these parameters, none of these works :
$ ffmpeg -i in.avi -c:v libx264 -crf 25 -pix_fmt yuv420p -preset veryslow -vf scale=640:360 -c:a aac -strict -2 -b:a 192k out.mp4
$ ffmpeg -i in.avi -c:v libx264 -crf 25 -pix_fmt yuv420p -preset veryslow -vf scale=640:360 -c:a aac -strict -2 -b:a 128k out.mp4
$ ffmpeg -i in.avi -c:v libx264 -crf 28 -pix_fmt yuv420p -preset veryslow -c:a aac -strict -2 -b:a 192k out.mp4
$ ffmpeg -i in.avi -c:v libx264 -b:v 2000k -pix_fmt yuv420p -preset veryslow -c:a aac -strict -2 -b:a 192k out.mp4
$ ffmpeg -i in.avi -c:v libx264 -crf 28 -pix_fmt yuv420p -level:v 3.2 -preset veryslow -c:a aac -strict -2 -b:a 192k out.mp4
$ ffmpeg -i in.avi -c:v libx264 -crf 28 -pix_fmt yuv420p -profile:v baseline -preset veryslow -c:a aac -strict -2 -b:a 192k out.mp4Here is the media info of the video that does work in all browsers.
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 12.5 MiB
Duration : 1mn 52s
Overall bit rate mode : Variable
Overall bit rate : 932 Kbps
Encoded date : UTC 2014-05-01 13:14:37
Tagged date : UTC 2014-05-01 13:14:37
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 15 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 52s
Bit rate : 768 Kbps
Maximum bit rate : 1 307 Kbps
Width : 640 pixels
Height : 360 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 60.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.056
Stream size : 10.7 MiB (86%)
Writing library : x264 core 128 r2216 198a7ea
Encoding settings : cabac=1 / ref=16 / deblock=1:0:0 / analyse=0x3:0x133 / me=tesa / subme=11 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=9 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=16 / b_pyramid=1 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=abr / mbtree=1 / bitrate=768 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Encoded date : UTC 2014-05-01 13:14:37
Tagged date : UTC 2014-05-01 13:14:37
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 1mn 52s
Bit rate mode : Variable
Bit rate : 124 Kbps
Maximum bit rate : 133 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 1.66 MiB (13%)
Encoded date : UTC 2014-05-01 13:14:37
Tagged date : UTC 2014-05-01 13:14:37Here is the media info of the video that does work only in Firefox.
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 57.4 MiB
Duration : 2mn 48s
Overall bit rate mode : Variable
Overall bit rate : 2 856 Kbps
Writing application : Lavf55.33.100
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5.0
Format settings, CABAC : Yes
Format settings, ReFrames : 16 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 2mn 48s
Bit rate : 2 655 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 60.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.048
Stream size : 53.3 MiB (93%)
Writing library : x264 core 142 r2397M b7a50c1
Encoding settings : cabac=1 / ref=16 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=crf / mbtree=1 / crf=25.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 2mn 48s
Duration_LastFrame : -19ms
Bit rate mode : Variable
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 3.79 MiB (7%) -
HTML5 - ffmpeg encoded x264 video fails to play in Chrome/IE
11 août 2014, par Saren ArteriusI have totally no idea why http://jiro.wtako.net/video/39 does work in all browsers while http://jiro.wtako.net/video/40 only works in Firefox.
1 is encoded by MediaCoder (x264 + Nero encoder) and 2 is encoded by Arch Linux ffmpeg.
ffmpeg version :
ffmpeg 1:2.3.1-1x264 version :
libx264 1:142.20140311-6It seems that video size, frame rate, profile, level, bitrate does not affect whether the video can be played, because I have tried all these parameters, none of these works :
$ ffmpeg -i in.avi -c:v libx264 -crf 25 -pix_fmt yuv420p -preset veryslow -vf scale=640:360 -c:a aac -strict -2 -b:a 192k out.mp4
$ ffmpeg -i in.avi -c:v libx264 -crf 25 -pix_fmt yuv420p -preset veryslow -vf scale=640:360 -c:a aac -strict -2 -b:a 128k out.mp4
$ ffmpeg -i in.avi -c:v libx264 -crf 28 -pix_fmt yuv420p -preset veryslow -c:a aac -strict -2 -b:a 192k out.mp4
$ ffmpeg -i in.avi -c:v libx264 -b:v 2000k -pix_fmt yuv420p -preset veryslow -c:a aac -strict -2 -b:a 192k out.mp4
$ ffmpeg -i in.avi -c:v libx264 -crf 28 -pix_fmt yuv420p -level:v 3.2 -preset veryslow -c:a aac -strict -2 -b:a 192k out.mp4
$ ffmpeg -i in.avi -c:v libx264 -crf 28 -pix_fmt yuv420p -profile:v baseline -preset veryslow -c:a aac -strict -2 -b:a 192k out.mp4Here is the media info of the video that does work in all browsers.
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 12.5 MiB
Duration : 1mn 52s
Overall bit rate mode : Variable
Overall bit rate : 932 Kbps
Encoded date : UTC 2014-05-01 13:14:37
Tagged date : UTC 2014-05-01 13:14:37
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 15 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 52s
Bit rate : 768 Kbps
Maximum bit rate : 1 307 Kbps
Width : 640 pixels
Height : 360 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 60.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.056
Stream size : 10.7 MiB (86%)
Writing library : x264 core 128 r2216 198a7ea
Encoding settings : cabac=1 / ref=16 / deblock=1:0:0 / analyse=0x3:0x133 / me=tesa / subme=11 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=9 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=16 / b_pyramid=1 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=abr / mbtree=1 / bitrate=768 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Encoded date : UTC 2014-05-01 13:14:37
Tagged date : UTC 2014-05-01 13:14:37
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 1mn 52s
Bit rate mode : Variable
Bit rate : 124 Kbps
Maximum bit rate : 133 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 1.66 MiB (13%)
Encoded date : UTC 2014-05-01 13:14:37
Tagged date : UTC 2014-05-01 13:14:37Here is the media info of the video that does work only in Firefox.
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 57.4 MiB
Duration : 2mn 48s
Overall bit rate mode : Variable
Overall bit rate : 2 856 Kbps
Writing application : Lavf55.33.100
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5.0
Format settings, CABAC : Yes
Format settings, ReFrames : 16 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 2mn 48s
Bit rate : 2 655 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 60.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.048
Stream size : 53.3 MiB (93%)
Writing library : x264 core 142 r2397M b7a50c1
Encoding settings : cabac=1 / ref=16 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=crf / mbtree=1 / crf=25.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 2mn 48s
Duration_LastFrame : -19ms
Bit rate mode : Variable
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 3.79 MiB (7%)
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