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Carte de Schillerkiez
13 mai 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Texte
Autres articles (57)
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Monitoring de fermes de MediaSPIP (et de SPIP tant qu’à faire)
31 mai 2013, parLorsque l’on gère plusieurs (voir plusieurs dizaines) de MediaSPIP sur la même installation, il peut être très pratique d’obtenir d’un coup d’oeil certaines informations.
Cet article a pour but de documenter les scripts de monitoring Munin développés avec l’aide d’Infini.
Ces scripts sont installés automatiquement par le script d’installation automatique si une installation de munin est détectée.
Description des scripts
Trois scripts Munin ont été développés :
1. mediaspip_medias
Un script de (...) -
Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
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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" (...)
Sur d’autres sites (10122)
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How do I get ffmpeg to concat 1 second from a list of files ?
13 juin 2023, par Stephen FluinI have about a thousand video clips and I've got ffmpeg and an ffmpeg file list setup like this :



file /path/to/1.mp4
file /path/to/2.mp4
...
file /path/to/1000.mp4




I want to concatenate the first second of each clip into an output clip. I've experimented with duration and outpoints specified in the file list, but neither seems to do what I want.



Here's the documentation I've read which I found unclear and lacking an example using the full API : https://ffmpeg.org/ffmpeg-formats.html#concat



Here's the closest I've come (concat the entirety of all files at 100x speed) :



ffmpeg -f concat -safe 0 -i ~/glass-videos.ffmpeg.txt -filter:v "setpts=PTS/100" -an output.mp4


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FFmpeg Video is not shown, after encoding audio and video
19 mars 2019, par Ashutosh SinglaI’m using FFMPEG to encode my video which also has audio in it
ffmpeg -i .\A0002780.kava23_Fin.avi -c:v libx265 -preset ultrafast -crf 20 -c:a aac output.mp4
This command is working OK with no errors. But when I play the video, I can hear only audio and can’t see the video.
Here are the logs of the command :
ffmpeg version N-83280-gcba4f0e Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 5.4.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid
--enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable- avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --
enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --
enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-
libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --
enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --
enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --
enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-
libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-
libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma -
-enable-decklink --enable-zlib
libavutil 55. 45.100 / 55. 45.100
libavcodec 57. 75.100 / 57. 75.100
libavformat 57. 65.100 / 57. 65.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 71.100 / 6. 71.100
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
[avi @ 0000000000f973a0] Stream #0: not enough frames to estimate rate; consider increasing probesize
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, avi, from '.\A0002780.kava23_Fin.avi':
Duration: 00:00:30.00, start: 0.000000, bitrate: 17697237 kb/s
Stream #0:0: Video: rawvideo, bgr24, 7680x3840, 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
x265 [info]: HEVC encoder version 2.2
x265 [info]: build info [Windows][GCC 5.4.0][64 bit] 8bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
x265 [info]: Main profile, Level-6 (Main tier)
x265 [info]: Thread pool created using 8 threads
x265 [info]: Slices : 1
x265 [info]: frame threads / pool features : 3 / wpp(120 rows)
x265 [info]: Coding QT: max CU size, min CU size : 32 / 16
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge : dia / 57 / 0 / 2
x265 [info]: Keyframe min / max / scenecut / bias: 25 / 250 / 0 / 5.00
x265 [info]: Lookahead / bframes / badapt : 5 / 3 / 0
x265 [info]: b-pyramid / weightp / weightb : 1 / 0 / 0
x265 [info]: References / ref-limit cu / depth : 1 / off / off
x265 [info]: AQ: mode / str / qg-size / cu-tree : 1 / 0.0 / 32 / 1
x265 [info]: Rate Control / qCompress : CRF-20.0 / 0.60
x265 [info]: tools: rd=2 psy-rd=2.00 early-skip rskip tmvp fast-intra
x265 [info]: tools: strong-intra-smoothing lslices=8 deblock
Output #0, mp4, to 'output.mp4':
Metadata:
encoder : Lavf57.65.100
Stream #0:0: Video: hevc (libx265) ([35][0][0][0] / 0x0023), yuv420p, 7680x3840, q=2-31, 25 fps, 12800 tbn, 25 tbc
Metadata:
encoder : Lavc57.75.100 libx265
Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s
Metadata:
encoder : Lavc57.75.100 aac
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> hevc (libx265))
Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
frame= 750 fps=0.7 q=-0.0 Lsize= 17320kB time=00:00:30.04 bitrate=4722.1kbits/s speed=0.0269x
video:16823kB audio:469kB subtitle:0kB other streams:0kB global headers:2kB muxing overhead: 0.159117%
x265 [info]: frame I: 3, Avg QP:22.35 kb/s: 250515.20
x265 [info]: frame P: 187, Avg QP:24.28 kb/s: 10607.54
x265 [info]: frame B: 560, Avg QP:27.67 kb/s: 1267.19
x265 [info]: consecutive B-frames: 1.1% 1.1% 0.0% 97.9%
encoded 750 frames in 1117.63s (0.67 fps), 4593.04 kb/s, Avg QP:26.80
[aac @ 00000000027c91e0] Qavg: 456.871It seems that there is no error and I can see that video and audio are encoded properly.
Any idea ?
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How can I broadcast a Twilio (group room) video conference ?
2 novembre 2022, par DanishI have been trying different solutions/approaches for last few days and posting here to get some more options.



I am planning to use Twilio's Programmable Video solution with Group room (upto 50 participants) to allow hosts/presenters to join video conference meeting. Right now I am able to setup and get started with quickstart example here



Also, in parallel, I need to be able to broadcast that live meeting room through RTMP/HLS (audio+video) streaming that can be viewed (through another portal) by large user set (ideally around 10k+)



Twilio support team suggested - integrating Twilio Video with Wowza using screenscrapping and ffmpeg (i.e. render the video into a (maybe virtual) screen, capture it and send to Wowza using ffmpeg.)



I am new to both ffmpeg and wowza. However, I am looking to see high level solution which can be used to achieve this (with minimum hanging parts).



Ideal flow i can think of is



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- Start a Twilio video conference room with actual presenters
- all participants share there video and audio tracks with each other in the room - standard behavior
- a new ghost-participant joins-in from stand-alone server (from wowza or SIP) and subscribes to audio-video tracks in conference.
- arrange & combine those tracks into one channel and stream it as HLS
- this ghost-participant will also be able to identify dominant speaker and re-arrange video tracks to show current speaker occupying bigger space (just like zoom)
- and of course, this streamed video (with audio) will be one-way and viewers cannot interact. Just see be able to see the room broadcasting.















Also/FYI
I have tried exploring few more options below (with no success)



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a blog here explain how can we broadcast a twilio audio
conference. At the bottom it also mention about video streaming. but, I am not getting how can we use SIP to get video stream that can be broadcasted. Also, how can I manipulate video tracks to show dominant speakers in full screen view Vs other participant in thumbnail view i.e. custom layouts.
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I also explored option of Wowza WebRTC streaming to achieve this, but it has got other technical challenges with setting up video room with multiple participants. I am going to reach out to them to see if this use-case is possible with their offering.
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I am looking for something as simple as here - dial as guest participant into video room from standalone streaming server/wowza server. And get output as single stream to broadcast.









Any other pointers or links to solutions would be helpful.