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Autres articles (54)
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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" (...) -
Les autorisations surchargées par les plugins
27 avril 2010, parMediaspip core
autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs -
Changer son thème graphique
22 février 2011, parLe thème graphique ne touche pas à la disposition à proprement dite des éléments dans la page. Il ne fait que modifier l’apparence des éléments.
Le placement peut être modifié effectivement, mais cette modification n’est que visuelle et non pas au niveau de la représentation sémantique de la page.
Modifier le thème graphique utilisé
Pour modifier le thème graphique utilisé, il est nécessaire que le plugin zen-garden soit activé sur le site.
Il suffit ensuite de se rendre dans l’espace de configuration du (...)
Sur d’autres sites (5220)
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ffmpeg slower than downloading
7 août 2017, par KrylicWhen trying to get a clip of a video from a remote source
Input source :ffprobe version 3.3.2-static http://johnvansickle.com/ffmpeg/ Copyright (c) 2007-2017 the FFmpeg developers
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'http://website.com/video.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41
creation_time : 2017-07-13T15:44:58.000000Z
Duration: 00:57:32.42, start: 0.000000, bitrate: 1939 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv), 720x480 [SAR 10:11 DAR 15:11], 1745 kb/s, 29.97 fps, 29.97 tbr, 29970 tbn, 59.94 tbc (default)
Metadata:
creation_time : 2017-07-13T15:44:58.000000Z
handler_name : Mainconcept MP4 Video Media Handler
encoder : AVC Coding
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default)
Metadata:
creation_time : 2017-07-13T15:44:58.000000Z
handler_name : Mainconcept MP4 Sound Media HandlerCurrent command :
ffmpeg version 3.3.2-static
ffmpeg.linux -threads 2 -y -ss 3273 -i "http://website.com/video.mp4" -an -movflags +faststart -preset veryfast -codec copy /outputfolder/trimmed_video.mp4
This 5m35.102s to create a 45mb 2min file.If I download the file using
wgetit takes 28s and using ffmpeg only takes 0.243sIf I add
-vnOR-anto the output portion of the command it completes the trim in about 2.101s. Meaning it’s faster to download the two stream and merge them myself.Can anyone explain this behaviour and why my first command takes so long when on a lot of other video files it’s very fast ?
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ffmpeg http slower than downloading first
9 août 2017, par KrylicWhen trying to get a clip of a video from a remote source
Input source :ffprobe version 3.3.2-static http://johnvansickle.com/ffmpeg/ Copyright (c) 2007-2017 the FFmpeg developers
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'http://website.com/video.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41
creation_time : 2017-07-13T15:44:58.000000Z
Duration: 00:57:32.42, start: 0.000000, bitrate: 1939 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv), 720x480 [SAR 10:11 DAR 15:11], 1745 kb/s, 29.97 fps, 29.97 tbr, 29970 tbn, 59.94 tbc (default)
Metadata:
creation_time : 2017-07-13T15:44:58.000000Z
handler_name : Mainconcept MP4 Video Media Handler
encoder : AVC Coding
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default)
Metadata:
creation_time : 2017-07-13T15:44:58.000000Z
handler_name : Mainconcept MP4 Sound Media HandlerCurrent command :
ffmpeg version 3.3.2-static
ffmpeg.linux -threads 2 -y -ss 3273 -i "http://website.com/video.mp4" -an -movflags +faststart -preset veryfast -codec copy /outputfolder/trimmed_video.mp4
This 5m35.102s to create a 45mb 2min file.If I download the file using
wgetit takes 28s and using ffmpeg only takes 0.243sIf I add
-vnOR-anto the output portion of the command it completes the trim in about 2.101s. Meaning it’s faster to download the two stream and merge them myself.Can anyone explain this behaviour and why my first command takes so long when on a lot of other video files it’s very fast ?
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ffmpeg : specify/force pixel format for input H.264 video
30 juillet 2017, par AndreGI have some MP4 video files missing the pixel format in their header information. I have already tried setting
probesizeandanalyzedurationto their maximum values 2147483647 but that didn’t help.So I know these videos are probably corrupt but if this is the only information missing I was thinking I could maybe recover them by rebuilding their header information or somehow decoding them by forcing a pixel format. Does anyone have any idea if this is possible ? Some more background on the file :
Mediainfo :
$ mediainfo DJI_0090.MOV
General
Complete name : DJI_0090.MOV
Format : MPEG-4
Format profile : QuickTime
Codec ID : qt 2014.02 (qt )
File size : 165 MiB
Duration : 22 s 322 ms
Overall bit rate mode : Variable
Overall bit rate : 61.8 Mb/s
Encoded date : UTC 2017-05-31 18:04:45
Tagged date : UTC 2017-05-31 18:04:45
Comment : 0.9.145
©gpt : -170.60
©gyw : +157.30
©grl : +0.00
IsTruncated : Yes
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.2
Format settings, CABAC : Yes
Format settings, RefFrames : 1 frame
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 22 s 322 ms
Bit rate mode : Variable
Bit rate : 59.4 Mb/s
Maximum bit rate : 50.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.478
Stream size : 158 MiB (96%)
Title : DJI.AVC
Language : English
Encoded date : UTC 2017-05-31 18:04:45
Tagged date : UTC 2017-05-31 18:04:45
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709ffprobe :
$ ffprobe -analyzeduration 2147483647 -probesize 2147483647 DJI_0090.MOV
ffprobe version 3.3.2 Copyright (c) 2007-2017 the FFmpeg developers
built with Apple LLVM version 8.1.0 (clang-802.0.42)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --disable-indev=qtkit --enable-ffplay --enable-libfdk-aac --enable-libmp3lame --enable-libsoxr --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --enable-opencl --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.1.2_1/include/openjpeg-2.1 --enable-nonfree --enable-vda
libavutil 55. 58.100 / 55. 58.100
libavcodec 57. 89.100 / 57. 89.100
libavformat 57. 71.100 / 57. 71.100
libavdevice 57. 6.100 / 57. 6.100
libavfilter 6. 82.100 / 6. 82.100
libavresample 3. 5. 0 / 3. 5. 0
libswscale 4. 6.100 / 4. 6.100
libswresample 2. 7.100 / 2. 7.100
libpostproc 54. 5.100 / 54. 5.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fc2e9002600] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 1920x1080): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'DJI_0090.MOV':
Metadata:
major_brand : qt
minor_version : 538182144
compatible_brands: qt
creation_time : 2017-05-31T18:04:45.000000Z
comment : 0.9.145
Duration: 00:00:22.36, bitrate: 61732 kb/s
Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), none, 1920x1080, 59.94 fps, 59.94 tbr, 60k tbn, 120k tbc (default)
Metadata:
creation_time : 2017-05-31T18:04:45.000000Z
handler_name : DJI.AVC
encoder : Dji AVC encoderI can’t force the pixel_format on ffmpeg this way :
$ ffmpeg -pixel_format yuv420p -i DJI_0090.MOV test.mp4
ffmpeg version 3.3.2 Copyright (c) 2000-2017 the FFmpeg developers
built with Apple LLVM version 8.1.0 (clang-802.0.42)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --disable-indev=qtkit --enable-ffplay --enable-libfdk-aac --enable-libmp3lame --enable-libsoxr --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --enable-opencl --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.1.2_1/include/openjpeg-2.1 --enable-nonfree --enable-vda
libavutil 55. 58.100 / 55. 58.100
libavcodec 57. 89.100 / 57. 89.100
libavformat 57. 71.100 / 57. 71.100
libavdevice 57. 6.100 / 57. 6.100
libavfilter 6. 82.100 / 6. 82.100
libavresample 3. 5. 0 / 3. 5. 0
libswscale 4. 6.100 / 4. 6.100
libswresample 2. 7.100 / 2. 7.100
libpostproc 54. 5.100 / 54. 5.100
Option pixel_format not found.Is there any other way to accomplish this with ffmpeg ? Is it possible to edit their header information to include the pixel format information ?
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