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Granite de l’Aber Ildut
9 septembre 2011, par
Mis à jour : Septembre 2011
Langue : français
Type : Texte
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Géodiversité
9 septembre 2011, par ,
Mis à jour : Août 2018
Langue : français
Type : Texte
Autres articles (66)
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Participer à sa traduction
10 avril 2011Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
Actuellement MediaSPIP n’est disponible qu’en français et (...) -
MediaSPIP Player : problèmes potentiels
22 février 2011, parLe lecteur ne fonctionne pas sur Internet Explorer
Sur Internet Explorer (8 et 7 au moins), le plugin utilise le lecteur Flash flowplayer pour lire vidéos et son. Si le lecteur ne semble pas fonctionner, cela peut venir de la configuration du mod_deflate d’Apache.
Si dans la configuration de ce module Apache vous avez une ligne qui ressemble à la suivante, essayez de la supprimer ou de la commenter pour voir si le lecteur fonctionne correctement : /** * GeSHi (C) 2004 - 2007 Nigel McNie, (...) -
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 (15130)
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ffmpeg resample to flac loud clicks/noise
4 août 2017, par Sjoerd StaalI’m using the ffmpeg-api to resample a DSD file to Flac & mp3. I don’t experience any problems with the mp3 resample, but with the flac resample there is always a loud click at the end of a track.
I’m using the FFMpeg API which outputs the following command in command line :
ffmpeg -i input.dsf -ar 192000 -acodec flac output.flac
Output :
ffmpeg version 2.8.5 Copyright (c) 2000-2016 the FFmpeg developers
built with Apple LLVM version 7.0.2 (clang-700.1.81)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.5 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
[mjpeg @ 0x7fe617809000] Changeing bps to 8
[dsf @ 0x7fe617000000] Estimating duration from bitrate, this may be inaccurate
Input #0, dsf, from 'input.dsf':
Metadata:
title : Bach Brandenburg no. 6 - Allegro
artist : Florilegium
album : Brandenburg Concertos
track : 3
Tool Version : 18.0.212
genre : Classical
composer : Bach
Catalog # : 35914
Format : DSD
ISRC : NLA460912792
Label : Channel Classics
Tool Name : Media Center
date : 2014
Duration: 00:06:00.31, bitrate: 5644 kb/s
Stream #0:0: Audio: dsd_lsbf_planar, 352800 Hz, stereo, fltp, 5644 kb/s
Stream #0:1: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1429x1417 [SAR 300:300 DAR 1429:1417], 90k tbr, 90k tbn, 90k tbc
Metadata:
title : Picture
comment : Cover (front)
[flac @ 0x7fe617122000] encoding as 24 bits-per-sample
Output #0, flac, to 'output.flac':
Metadata:
title : Bach Brandenburg no. 6 - Allegro
artist : Florilegium
album : Brandenburg Concertos
TRACKNUMBER : 3
Tool Version : 18.0.212
genre : Classical
composer : Bach
Catalog # : 35914
Format : DSD
ISRC : NLA460912792
Label : Channel Classics
Tool Name : Media Center
date : 2014
encoder : Lavf56.40.101
Stream #0:0: Audio: flac, 192000 Hz, stereo, s32 (24 bit), 128 kb/s
Metadata:
encoder : Lavc56.60.100 flac
Stream mapping:
Stream #0:0 -> #0:0 (dsd_lsbf_planar (native) -> flac (native))
Press [q] to stop, [?] for help
size= 306541kB time=00:05:58.10 bitrate=7012.3kbits/s
video:0kB audio:306532kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.002733% -
ffmpeg overlay video with transparent background
27 octobre 2015, par endryhaI have 2 videos : background (mp4) and overlay (mov), overlay has transparent background. I am trying to put video with transparent background as overlay on top of background video. But unfortunately overlay completely cover background video with black background instead of transparency.
I am using following command :Here is the full output for the command :
ffmpeg -y -i rec_20151027_123445.mp4 -vf "[in]format=rgba[ina];movie=overlay_1920x1080_1.mov[o];[ina][o]overlay=0:0" -vcodec qtrle converted.mov
ffmpeg version 2.6 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.6_1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'rec_20151027_123445.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2015-10-27 10:34:57
location : +50.0474+036.2031/
location-eng : +50.0474+036.2031/
Duration: 00:00:06.04, start: 0.000000, bitrate: 16863 kb/s
Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080, 16837 kb/s, SAR 1:1 DAR 16:9, 29.62 fps, 29.75 tbr, 90k tbn, 180k tbc (default)
Metadata:
creation_time : 2015-10-27 10:34:57
handler_name : VideoHandle
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 95 kb/s (default)
Metadata:
creation_time : 2015-10-27 10:34:57
handler_name : SoundHandle
[swscaler @ 0x7fa3db0ada00] No accelerated colorspace conversion found from yuva420p to argb.
Output #0, mov, to 'converted.mov':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
location-eng : +50.0474+036.2031/
location : +50.0474+036.2031/
encoder : Lavf56.25.101
Stream #0:0(eng): Video: qtrle (rle / 0x20656C72), argb, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 29.75 fps, 15232 tbn, 29.75 tbc (default)
Metadata:
creation_time : 2015-10-27 10:34:57
handler_name : VideoHandle
encoder : Lavc56.26.100 qtrle
Stream #0:1(eng): Audio: aac (libvo_aacenc) (mp4a / 0x6134706D), 48000 Hz, mono, s16, 128 kb/s (default)
Metadata:
creation_time : 2015-10-27 10:34:57
handler_name : SoundHandle
encoder : Lavc56.26.100 libvo_aacenc
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> qtrle (native))
Stream #0:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
Press [q] to stop, [?] for help
frame= 179 fps= 19 q=0.0 Lsize= 126621kB time=00:00:06.05 bitrate=171213.2kbits/s dup=1 drop=1
video:126519kB audio:95kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.005055% -
Revision bde04ce503 : Merge branch 'frame-parallel' to enable frame parallel decode in master branch.
21 janvier 2015, par hkuangChanged Paths :
Modify /test/test-data.mk
Modify /test/test-data.sha1
Modify /test/test.mk
Modify /test/test_vector_test.cc
Modify /test/test_vectors.cc
Modify /test/vp9_encoder_parms_get_to_decoder.cc
Modify /test/vp9_frame_parallel_test.cc
Modify /vp9/common/vp9_alloccommon.c
Modify /vp9/common/vp9_alloccommon.h
Modify /vp9/common/vp9_entropymode.c
Modify /vp9/common/vp9_mvref_common.c
Modify /vp9/common/vp9_mvref_common.h
Modify /vp9/common/vp9_onyxc_int.h
Modify /vp9/common/vp9_reconinter.c
Modify /vp9/common/vp9_reconinter.h
Modify /vp9/decoder/vp9_decodeframe.c
Modify /vp9/decoder/vp9_decodeframe.h
Modify /vp9/decoder/vp9_decodemv.c
Modify /vp9/decoder/vp9_decoder.c
Modify /vp9/decoder/vp9_decoder.h
Modify /vp9/decoder/vp9_dthread.c
Modify /vp9/decoder/vp9_dthread.h
Modify /vp9/encoder/vp9_encoder.c
Modify /vp9/encoder/vp9_encoder.h
Modify /vp9/encoder/vp9_firstpass.c
Modify /vp9/encoder/vp9_pickmode.c
Modify /vp9/encoder/vp9_rd.c
Modify /vp9/encoder/vp9_rdopt.c
Modify /vp9/vp9_cx_iface.c
Modify /vp9/vp9_dx_iface.c
Modify /vp9/vp9dx.mk
Modify /vpx/vpx_frame_buffer.h
Merge branch ’frame-parallel’ to enable frame parallel decode in master branch.In frame parallel decode, libvpx decoder decodes several frames on all
cpus in parallel fashion. If not being flushed, it will only return frame
when all the cpus are busy. If getting flushed, it will return all the
frames in the decoder. Compare with current serial decode mode in which
libvpx decoder is idle between decode calls, libvpx decoder is busy
between decode calls. VP9 frame parallel decode is >30% faster than serial
decode with tile parallel threading which will makes devices play 1080P
VP9 videos more easily.* frame-parallel :
Add error handling for frame parallel decode and unit test for that.
Fix a bug in frame parallel decode and add a unit test for that.
Add two test vectors to test frame parallel decode.
Add key frame seeking to webmdec and webm_video_source.
Implement frame parallel decode for VP9.
Increase the thread test range to cover 5, 6, 7, 8 threads.
Fix a bug in adding frame parallel unit test.
Add VP9 frame-parallel unit test.
Manually pick "Make the api behavior conform to api spec." from master branch.
Move vp9_dec_build_inter_predictors_* to decoder folder.
Add segmentation map array for current and last frame segmentation.
Include the right header for VP9 worker thread.
Move vp9_thread.* to common.
ctrl_get_reference does not need user_priv.
Seperate the frame buffers from VP9 encoder/decoder structure.
Revert "Revert "Revert "Revert 3 patches from Hangyu to get Chrome to
build :"""Conflicts :
test/codec_factory.h
test/decode_test_driver.cc
test/decode_test_driver.h
test/invalid_file_test.cc
test/test-data.sha1
test/test.mk
test/test_vectors.cc
vp8/vp8_dx_iface.c
vp9/common/vp9_alloccommon.c
vp9/common/vp9_entropymode.c
vp9/common/vp9_loopfilter_thread.c
vp9/common/vp9_loopfilter_thread.h
vp9/common/vp9_mvref_common.c
vp9/common/vp9_onyxc_int.h
vp9/common/vp9_reconinter.c
vp9/decoder/vp9_decodeframe.c
vp9/decoder/vp9_decodeframe.h
vp9/decoder/vp9_decodemv.c
vp9/decoder/vp9_decoder.c
vp9/decoder/vp9_decoder.h
vp9/encoder/vp9_encoder.c
vp9/encoder/vp9_pickmode.c
vp9/encoder/vp9_rdopt.c
vp9/vp9_cx_iface.c
vp9/vp9_dx_iface.cChange-Id : Ib92eb35851c172d0624970e312ed515054e5ca64