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Autres articles (75)
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Les tâches Cron régulières de la ferme
1er décembre 2010, parLa gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
Le super Cron (gestion_mutu_super_cron)
Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...) -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.
Sur d’autres sites (11828)
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net core and video transcoding on aws lambda
14 septembre 2022, par user1765862I'm looking for a solution to :


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- upload video to s3 bucket
- after video upload an aws lambda function will be triggered
- lambda function will use ffmpeg layer in order to transcode video (mainly cropping with other functionalities)
- save result (transcoded video into s3 bucket)










My language of choice inside lambda is c# and net core runtime.


I have found various resources for video manipulation with aws ffmpeg layer using lambda function but no examples in net core lambda.


My question is :




Can I use existing FFmpeg/FFprobe Lambda Layer for Amazon Linux such
as this one with lambda function written in c# and .net core ?




Another question :




Would you suggest Amazon Elastic Transcoder as a better choice with
lambda function .net core integration ?




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Converting png images series to webm with transparent white background from Daz3d
25 août 2015, par JamesI’m trying to make a webm video with a transparent background from a Daz3D model.
My process is export png image series with transparent background from Daz3D, use ffmpeg to convert png series to webm video.
This was working well in Daz3D 4.6.But in Daz3D 4.8 the exported background is black instead of white, so when converted to webm is ok on Chrome as has the transparency, but on Firefox is black and has a halo (as Firefox does not support transparency so displays background).
So I’m looking for a solution with Daz3D, or tools like ImageMagik.
I almost got it with ImageMagik,convert -alpha extract *.png mask.png
mogrify -flatten talk*.png
for /f %x in ('dir /s /b blink*.png') do @composite -compose CopyOpacity mask-0.png %x %xBut for some reason the final webm has a white background not transparent ...
Some more info here,http://www.daz3d.com/forums/discussion/61237/daz3d-4-8-png-background-is-black
and here,
http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=28214
>
Doh, okay I figured it out. My images were good, but I somehow have two different versions of ffmpeg on my computer and was using the wrong one that doesn’t seem to support transparency.Now it is working.
My only issue is the last shell line,
for /f %x in (’dir /s /b blink*.png’) do @composite -compose CopyOpacity mask-0.png %x %x
This only uses mask-0.png, instead of mask-1 for blink01.png, mask-2 for blink02.png etc.
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Samsung S3 : 'Cannot play Video' on stock Video player
18 mars 2013, par d33pikaI am unable to play a mp4 video(H.264 Baseline, AAC) on Samsung S3, Android Version : 4.1.1, stock video player but plays on VLC. The same video plays on Galaxy Beam, Android Version : 2.3.6, stock Video Player. I want to figure out why it does not play on S3. I ran ffprobe and mediainfo on the fie :
ffprobe results :
ffprobe version 0.11.1 Copyright (c) 2007-2012 the FFmpeg developers
built on Jan 25 2013 15:16:27 with llvm_gcc 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)
configuration: --prefix=/usr/local/Cellar/ffmpeg/0.11.1 --enable-shared --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --cc=/usr/bin/llvm-gcc --host-cflags='-Os -w -pipe -march=core2 -msse4 -mmacosx-version-min=10.7' --host-ldflags=-L/usr/local/lib --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
libavutil 51. 54.100 / 51. 54.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.100 / 54. 6.100
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '86535_360p_1301310230.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isomavc1
creation_time : 2013-01-31 02:36:22
Duration: 00:03:49.53, start: 0.000000, bitrate: 799 kb/s
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 699 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc
Metadata:
creation_time : 2013-01-31 02:34:00
handler_name : GPAC ISO Video Handler
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 96000 Hz, stereo, s16, 95 kb/s
Metadata:
creation_time : 2013-01-31 02:36:22
handler_name : GPAC ISO Audio HandlerMedia info results :
General
Complete name : a.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 21.9 MiB
Duration : 3mn 49s
Overall bit rate mode : Variable
Overall bit rate : 799 Kbps
Encoded date : UTC 2013-01-31 02:36:22
Tagged date : UTC 2013-01-31 02:36:22
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L3.0
Format settings, CABAC : No
Format settings, ReFrames : 3 frames
Format settings, GOP : M=1, N=30
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 3mn 49s
Bit rate : 700 Kbps
Maximum bit rate : 2 721 Kbps
Width : 640 pixels
Height : 360 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.127
Stream size : 19.1 MiB (88%)
Writing library : Zencoder Video Encoding System
Encoded date : UTC 2013-01-31 02:34:00
Tagged date : UTC 2013-01-31 02:36:22
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 3mn 49s
Bit rate mode : Variable
Bit rate : 96.0 Kbps
Maximum bit rate : 121 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 96.0 KHz
Compression mode : Lossy
Stream size : 2.62 MiB (12%)
Encoded date : UTC 2013-01-31 02:36:22
Tagged date : UTC 2013-01-31 02:36:22I suspect the video player is more stricter on some codec header values. The level is set to 3.0 and this should be correct. Any help in figuring this out is appreciated !