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Autres articles (60)
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Gestion générale des documents
13 mai 2011, parMédiaSPIP ne modifie jamais le document original mis en ligne.
Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...) -
Use, discuss, criticize
13 avril 2011, parTalk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users. -
Personnaliser en ajoutant son logo, sa bannière ou son image de fond
5 septembre 2013, parCertains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;
Sur d’autres sites (11774)
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How to detect anamorphic video with FFProbe ?
29 mai 2015, par FlavorScapeThis is the output I get using FFProbe for a video I’m certain is anamorphic. I’ve converted it as a test with ffmpeg and the results are consistent with the video having a different PAR and DAR (video is squished). I ran some command line params to fix anamorphic video and it worked. Possibly my diagnosis is incorrect, the PAR and DAR are just plain wrong ?
The code I used to "correct" the anamamorphic is
--custom-anamorphic --display-width 1280 --keep-display-aspect --modulus 8 --crop 0:0:0:0Is there an additional command with FFProbe to detect for anamorphic ? So far I’m just seeing if the sample_aspect_ratio and display_aspect_ratio are the same or not.
Additionally, a ratio of 0:1 seems incorrect. My video is not infinitely wide. Is there a bug with FFProbe output ?
This is the command
-print_format json -show_format -show_streams {originalFilePath}FFProbe version N-54233-g86190af built on Jun 27 2013 outputs the following :
"Output{
\"streams\": [
{
\"index\": 0,
\"codec_name\": \"h264\",
\"codec_long_name\": \"H.264/AVC/MPEG-4AVC/MPEG-4part10\",
\"profile\": \"Main\",
\"codec_type\": \"video\",
\"codec_time_base\": \"1/5994\",
\"codec_tag_string\": \"avc1\",
\"codec_tag\": \"0x31637661\",
\"width\": 1280,
\"height\": 720,
\"has_b_frames\": 0,
\"sample_aspect_ratio\": \"0: 1\",
\"display_aspect_ratio\": \"0: 1\",
\"pix_fmt\": \"yuv420p\",
\"level\": 31,
\"r_frame_rate\": \"2997/100\",
\"avg_frame_rate\": \"2997/100\",
\"time_base\": \"1/2997\",
\"start_pts\": 0,
\"start_time\": \"0.000000\",
\"duration_ts\": 204100,
\"duration\": \"68.101435\",
\"bit_rate\": \"3894381\",
\"nb_frames\": \"2041\",
\"disposition\": {
\"default\": 0,
\"dub\": 0,
\"original\": 0,
\"comment\": 0,
\"lyrics\": 0,
\"karaoke\": 0,
\"forced\": 0,
\"hearing_impaired\": 0,
\"visual_impaired\": 0,
\"clean_effects\": 0,
\"attached_pic\": 0
},
\"tags\": {
\"creation_time\": \"2013-05-0318: 33: 37\",
\"language\": \"eng\",
\"handler_name\": \"AppleAliasDataHandler\"
}
},
{
\"index\": 1,
\"codec_name\": \"aac\",
\"codec_long_name\": \"AAC(AdvancedAudioCoding)\",
\"codec_type\": \"audio\",
\"codec_time_base\": \"1/44100\",
\"codec_tag_string\": \"mp4a\",
\"codec_tag\": \"0x6134706d\",
\"sample_fmt\": \"fltp\",
\"sample_rate\": \"44100\",
\"channels\": 2,
\"bits_per_sample\": 0,
\"r_frame_rate\": \"0/0\",
\"avg_frame_rate\": \"0/0\",
\"time_base\": \"1/44100\",
\"start_pts\": 0,
\"start_time\": \"0.000000\",
\"duration_ts\": 3003392,
\"duration\": \"68.104127\",
\"bit_rate\": \"125304\",
\"nb_frames\": \"2933\",
\"disposition\": {
\"default\": 0,
\"dub\": 0,
\"original\": 0,
\"comment\": 0,
\"lyrics\": 0,
\"karaoke\": 0,
\"forced\": 0,
\"hearing_impaired\": 0,
\"visual_impaired\": 0,
\"clean_effects\": 0,
\"attached_pic\": 0
},
\"tags\": {
\"creation_time\": \"2013-05-0318: 33: 37\",
\"language\": \"eng\",
\"handler_name\": \"AppleAliasDataHandler\"
}
}
],
\"format\": {
\"filename\": \"\\\\\\\\dell690\\\\vsf\\\\_asset_intake\\\\v2\\\\ed69c939-4fe1-40dd-a045-db72ed2e0009\\\\original\\\\USTC_Overview2.mov\",
\"nb_streams\": 2,
\"format_name\": \"mov,
mp4,
m4a,
3gp,
3g2,
mj2\",
\"format_long_name\": \"QuickTime/MOV\",
\"start_time\": \"0.000000\",
\"duration\": \"68.100000\",
\"size\": \"34267583\",
\"bit_rate\": \"4025560\",
\"tags\": {
\"major_brand\": \"qt\",
\"minor_version\": \"537199360\",
\"compatible_brands\": \"qt\",
\"creation_time\": \"2013-05-0318: 33: 37\"
}
}
}" -
ffmpeg frame rate issue h264+ass to mkv
27 juin 2013, par user2529661I'm using this command for ffmpeg :
ffmpeg -i 1.h264 -i ass1.ass -map 0 -map 1 -c copy test.mkvThe h264 file is 30 fps... the mkv plays at 25fps so it runs slow
The h264 come off my hd webcam. If i change the frame rate on the camera to 25 it works fine and 15fps wilk play at high speed. I can force the frame rate ? Every if i need a different command line tool to change it that is acceptable. But if i could fix it form ffmpeg that would be ideal. I'm running the commands from vb.net.
command output
C:\Record\Normal\2013-06-27>c:\ffmpeg\bin\ffmpeg -i 1.h264 -i ass1.ass -map 0 -
map 1 -c copy test.mkv
ffmpeg version N-54207-ge59fb3f Copyright (c) 2000-2013 the FFmpeg developers
built on Jun 25 2013 21:55:00 with gcc 4.7.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
enable-libxvid --enable-zlib
libavutil 52. 37.101 / 52. 37.101
libavcodec 55. 17.100 / 55. 17.100
libavformat 55. 10.100 / 55. 10.100
libavdevice 55. 2.100 / 55. 2.100
libavfilter 3. 77.101 / 3. 77.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Input #0, h264, from '1.h264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (Baseline), yuv420p, 1920x1088 [SAR 1:1 DAR 30:17],
25 fps, 25 tbr, 1200k tbn, 50 tbc
Input #1, ass, from 'ass1.ass':
Duration: N/A, bitrate: N/A
Stream #1:0: Subtitle: ssa
File 'test.mkv' already exists. Overwrite ? [y/N] y
Output #0, matroska, to 'test.mkv':
Metadata:
encoder : Lavf55.10.100
Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p, 1920x1088 [SAR 1:1 DA
R 30:17], q=2-31, 25 fps, 1k tbn, 1200k tbc
Stream #0:1: Subtitle: ssa
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #1:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 144 fps=0.0 q=-1.0 Lsize= 2451kB time=00:00:05.72 bitrate=3509.6kbits
/s
video:2447kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.125529% -
How to concatenate two videos w. ffmpeg — documented code not working
2 mars 2014, par Jim MillerI'm trying to concatenate two videos with ffmpeg. Nothing fancy ; I just want one video that consists of video A immediately followed by video B.
I've tried the code from How to concatenate (join, merge) media files on a freshly built and otherwise-working-fine install of ffmpeg 1.2.1 on Fedora 17, but the following error message appears :
$ ffmpeg -i video_a.mov -i video_b.mov -filter_complex '[0:0] [0:1] [1:0] [1:1] concat=n=2:v=1:a=1 [v] [a]' -map '[v]' -map '[a]' output.mp4
ffmpeg version N-54271-g7f866c1 Copyright (c) 2000-2013 the FFmpeg developers
built on Jun 29 2013 11:05:42 with gcc 4.7.2 (GCC) 20120921 (Red Hat 4.7.2-2)
configuration: --enable-gpl --enable-nonfree --enable-pthreads --enable-libx264 --enable-libfaac --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib
libavutil 52. 37.101 / 52. 37.101
libavcodec 55. 17.100 / 55. 17.100
libavformat 55. 10.100 / 55. 10.100
libavdevice 55. 2.100 / 55. 2.100
libavfilter 3. 77.101 / 3. 77.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'v1221-MTQxMzcyNTIxODU2.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2013-03-28 20:34:59
encoder : Mac OS X v10.8.3 (CMA 914, CM 926.87, x86_64)
encoder-eng : Mac OS X v10.8.3 (CMA 914, CM 926.87, x86_64)
Duration: 00:00:05.34, start: 0.000000, bitrate: 15837 kb/s
Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 221 kb/s
Metadata:
creation_time : 2013-03-28 20:34:59
handler_name : Core Media Data Handler
Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 15512 kb/s, 29.81 fps, 30 tbr, 600 tbn, 1200 tbc
Metadata:
creation_time : 2013-03-28 20:34:59
handler_name : Core Media Data Handler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'v1224-MTQxMzcyNTIxODg5.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2013-03-28 20:36:28
encoder : Mac OS X v10.8.3 (CMA 914, CM 926.87, x86_64)
encoder-eng : Mac OS X v10.8.3 (CMA 914, CM 926.87, x86_64)
Duration: 00:00:04.13, start: 0.000000, bitrate: 15689 kb/s
Stream #1:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 221 kb/s
Metadata:
creation_time : 2013-03-28 20:36:28
handler_name : Core Media Data Handler
Stream #1:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 15446 kb/s, 29.79 fps, 30 tbr, 600 tbn, 1200 tbc
Metadata:
creation_time : 2013-03-28 20:36:28
handler_name : Core Media Data Handler
Stream specifier ':0' in filtergraph description [0:0] [0:1] [1:0] [1:1] concat=n=2:v=1:a=1 [v] [a] matches no streams.A few other things to note :
- The two videos I'm working with were shot with the same camera, so there shouldn't be any problems with aspect ratio or other gory video details.
- I'm able to do other things with my ffmpeg installation, like convert one of those videos from .mov to .mp4 (yes, I had to recompile with faac...), which seems to vouch for both the ffmpeg and the video.
- I've tried modifying the above invocation to produce a .mov file at the end, but I get the same error as before.
- I've tried some stupid hacking tricks on the request above, like concatenating two copies of the same video, as well as some other invocations from other places around the web that involve
filter_complex. Even on ones that were cited as working, I get the "matches no streams" message.
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