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Médias (1)
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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (41)
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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 -
Librairies et logiciels spécifiques aux médias
10 décembre 2010, parPour un fonctionnement correct et optimal, plusieurs choses sont à prendre en considération.
Il est important, après avoir installé apache2, mysql et php5, d’installer d’autres logiciels nécessaires dont les installations sont décrites dans les liens afférants. Un ensemble de librairies multimedias (x264, libtheora, libvpx) utilisées pour l’encodage et le décodage des vidéos et sons afin de supporter le plus grand nombre de fichiers possibles. Cf. : ce tutoriel ; FFMpeg avec le maximum de décodeurs et (...) -
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 (8057)
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FFMPEG streaming ip cam get delay from start record to first frame
4 janvier 2019, par Vincent CarreteroI’m recording stream from IP CAM with FFMPEG.
I would like to know the exact timestamp when start the output video.Example :
I have an output mp4 file created at 2019/01/04 09:10:15 (file created).
FFMpeg take few seconds to really start streaming (initialising, etc...)
The first frame really start at 2019/01/04 09:10:19 (just supposed, I would like to get this info).Thanks !
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Overlay a video on another video at specific time with FFmpeg
4 janvier 2019, par Tina JI am trying to overlay a video with another video. I followed the original command OP posted here. And it works, but it overlays the video from time 0 :
ffmpeg -i 720480.mp4 -i sdbug.mov -filter_complex "[0:0][1:0]overlay[out]" -shortest -map [out] -map 0:1 -pix_fmt yuv420p -c:a copy -c:v libx264 -crf 18 new.mp4
I tried the correct answer to specify a time, but it is not working for me : 1) the overlay starts at around second
12
, and 2) video is not played after the overlay is finished.ffmpeg -i 720480.mp4 -i sdbug.mov -filter_complex "[1:v]setpts=PTS+10/TB[a]; [0:v][a]overlay=enable=gte(t\,5):shortest=1[out]" -map [out] -map 0:a -c:v libx264 -crf 18 -pix_fmt yuv420p -c:a copy new.mp4
Anything changed recently on
FFmpeg
?! Why isn’t it working ?Here is the output of this command (it finishes very fast) :
ffmpeg version N-92906-g54109b1d14 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 8.2.1 (GCC) 20181201
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
libavutil 56. 25.100 / 56. 25.100
libavcodec 58. 43.100 / 58. 43.100
libavformat 58. 25.100 / 58. 25.100
libavdevice 58. 6.101 / 58. 6.101
libavfilter 7. 46.101 / 7. 46.101
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '720480.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 2018-07-26T09:23:16.000000Z
Duration: 00:01:50.17, start: 0.000000, bitrate: 3181 kb/s
Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x480 [SAR 8:9 DAR 4:3], 2785 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
Metadata:
creation_time : 2018-07-26T09:23:16.000000Z
handler_name : VideoHandler
timecode : 00:59:55:12
Stream #0:1: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
Metadata:
creation_time : 2018-07-26T09:23:16.000000Z
handler_name : SoundHandler
Stream #0:2: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
Metadata:
creation_time : 2018-07-26T09:23:16.000000Z
handler_name : SoundHandler
Stream #0:3: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
Metadata:
creation_time : 2018-07-26T09:23:16.000000Z
handler_name : SoundHandler
Stream #0:4: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
Metadata:
creation_time : 2018-07-26T09:23:16.000000Z
handler_name : SoundHandler
Stream #0:5: Data: none (tmcd / 0x64636D74) (default)
Metadata:
creation_time : 2018-07-26T09:23:16.000000Z
handler_name : TimecodeMediaHandler
timecode : 00:59:55:12
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'sdbug.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2018-08-29T14:50:13.000000Z
Duration: 00:00:10.01, start: 0.000000, bitrate: 10504 kb/s
Stream #1:0(eng): Video: qtrle (rle / 0x20656C72), bgra(progressive), 720x486, 9666 kb/s, SAR 109:120 DAR 109:81, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc (default)
Metadata:
creation_time : 2018-08-29T14:50:13.000000Z
handler_name : Apple Video Media Handler
encoder : Animation
timecode : 00:00:00;00
Stream #1:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
Metadata:
creation_time : 2018-08-29T14:50:13.000000Z
handler_name : Time Code Media Handler
timecode : 00:00:00;00
Stream mapping:
Stream #0:0 (h264) -> overlay:main
Stream #1:0 (qtrle) -> setpts
overlay -> Stream #0:0 (libx264)
Stream #0:1 -> #0:1 (copy)
Stream #0:2 -> #0:2 (copy)
Stream #0:3 -> #0:3 (copy)
Stream #0:4 -> #0:4 (copy)
Press [q] to stop, [?] for help
[libx264 @ 000002b902a3f480] using SAR=8/9
[libx264 @ 000002b902a3f480] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 000002b902a3f480] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 000002b902a3f480] 264 - core 157 r2935 545de2f - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=12 lookahead_threads=2 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 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=18.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'new.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.25.100
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 720x480 [SAR 8:9 DAR 4:3], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
Metadata:
encoder : Lavc58.43.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
Metadata:
creation_time : 2018-07-26T09:23:16.000000Z
handler_name : SoundHandler
Stream #0:2: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
Metadata:
creation_time : 2018-07-26T09:23:16.000000Z
handler_name : SoundHandler
Stream #0:3: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
Metadata:
creation_time : 2018-07-26T09:23:16.000000Z
handler_name : SoundHandler
Stream #0:4: Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
Metadata:
creation_time : 2018-07-26T09:23:16.000000Z
handler_name : SoundHandler
frame= 599 fps= 92 q=-1.0 Lsize= 11556kB time=00:01:50.01 bitrate= 860.5kbits/s speed=16.8x
video:6173kB audio:5288kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.828358%
[libx264 @ 000002b902a3f480] frame I:8 Avg QP:13.24 size: 44134
[libx264 @ 000002b902a3f480] frame P:174 Avg QP:18.62 size: 20916
[libx264 @ 000002b902a3f480] frame B:417 Avg QP:21.31 size: 5583
[libx264 @ 000002b902a3f480] consecutive B-frames: 6.0% 1.7% 5.5% 86.8%
[libx264 @ 000002b902a3f480] mb I I16..4: 15.9% 58.9% 25.2%
[libx264 @ 000002b902a3f480] mb P I16..4: 1.4% 13.6% 4.2% P16..4: 36.6% 22.8% 12.3% 0.0% 0.0% skip: 9.0%
[libx264 @ 000002b902a3f480] mb B I16..4: 0.1% 0.9% 0.3% B16..8: 46.4% 10.6% 2.9% direct: 5.5% skip:33.3% L0:53.4% L1:36.9% BI: 9.7%
[libx264 @ 000002b902a3f480] 8x8 transform intra:68.5% inter:65.1%
[libx264 @ 000002b902a3f480] coded y,uvDC,uvAC intra: 77.5% 89.5% 77.2% inter: 26.8% 48.1% 10.1%
[libx264 @ 000002b902a3f480] i16 v,h,dc,p: 50% 13% 13% 23%
[libx264 @ 000002b902a3f480] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 12% 17% 6% 8% 10% 7% 9% 7%
[libx264 @ 000002b902a3f480] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 13% 10% 7% 12% 11% 9% 9% 7%
[libx264 @ 000002b902a3f480] i8c dc,h,v,p: 51% 15% 24% 10%
[libx264 @ 000002b902a3f480] Weighted P-Frames: Y:5.2% UV:2.9%
[libx264 @ 000002b902a3f480] ref P L0: 60.1% 19.6% 15.8% 4.4% 0.1%
[libx264 @ 000002b902a3f480] ref B L0: 91.6% 7.3% 1.1%
[libx264 @ 000002b902a3f480] ref B L1: 97.2% 2.8%
[libx264 @ 000002b902a3f480] kb/s:2529.97 -
Why Matomo is a serious alternative to Google Analytics 360
12 décembre 2018, par Jake Thornton — Marketing