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Autres articles (85)
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Les formats acceptés
28 janvier 2010, parLes commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
ffmpeg -codecs ffmpeg -formats
Les format videos acceptés en entrée
Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
Les formats vidéos de sortie possibles
Dans un premier temps on (...) -
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" (...) -
Récupération d’informations sur le site maître à l’installation d’une instance
26 novembre 2010, parUtilité
Sur le site principal, une instance de mutualisation est définie par plusieurs choses : Les données dans la table spip_mutus ; Son logo ; Son auteur principal (id_admin dans la table spip_mutus correspondant à un id_auteur de la table spip_auteurs)qui sera le seul à pouvoir créer définitivement l’instance de mutualisation ;
Il peut donc être tout à fait judicieux de vouloir récupérer certaines de ces informations afin de compléter l’installation d’une instance pour, par exemple : récupérer le (...)
Sur d’autres sites (9934)
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Youtube-dl and Shell speed
7 août 2016, par JJ The SecondSo I’ve been experimenting with youtube-dl on Ubuntu 14 recently and I should say downloading is well fast even I have a 1GB Ubuntu LAMP but when it comes to triggering FFMPEG and deleting process hangs for a good time. Even worked with -k but as soon as FFMPEG process is completed, it takes time to respond. I do understand this is a big subject but I’d really like to hear your thoughts, what amazes me is how a website like thisis running in less than a second ? Here is what I have,
[youtube] UxxajLWwzqY: Downloading webpage
[youtube] UxxajLWwzqY: Downloading video info webpage
[youtube] UxxajLWwzqY: Extracting video information
[info] Writing video description metadata as JSON to: /var/www/html/download/Icona Pop - I Love It (feat. Charli XCX) [OFFICIAL VIDEO].info.json
[download] Destination: /var/www/html/download/Icona Pop - I Love It (feat. Charli XCX) [OFFICIAL VIDEO].m4a
[download] 100% of 2.73MiB in 00:00
[ffmpeg] Correcting container in "/var/www/html/download/title.m4a"
[ffmpeg] Destination: /var/www/html/download/title.mp3
Deleting original file /var/www/html/download/title.m4a (pass -k to keep)youtube-dl "http://www.youtube.com/watch?v=UxxajLWwzqY" --write-info-json --extract-audio --audio-format mp3 -o "/var/www/html/download/%(title)s.%(ext)s"
I really don’t understand how this is done so fast ? Is there anything I’m missing ?
Thanks for your time.
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how do I set speed rate (ex:double speed) in FFmpeg library ?
19 avril 2018, par geeeekI’m working on rtsp live video from ffmpeg and rendering it on the screen.
However, the image is displayed after 1 to 2 seconds.
to reduce video delay, So I want to increase the playback speed in my program.
int64_t duration = m_formatCtx-> duration;
duration = duration * 1000;
av_seek_frame (m_formatCtx, m_videoStream, duration, AVSEEK_FLAG_ANY);
av_seek_frame (m_formatCtx, m_audioStream, duration, AVSEEK_FLAG_ANY);
while (av_read_frame (m_formatCtx, & m_packet)> = 0)I can not get the result I want in this way.
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How to speed up ffmpeg video conversion
22 avril 2018, par user2993497ffmpeg -i video.mp4 -c:v libvpx-vp9 -keyint_min 150 -g 150 -tile-columns 4 -frame-parallel 1 -f webm -dash 1 -an -vf scale=160:190 -b:v 250k -dash 1 video_160x90_250k.webm -an -vf scale=320:180 -b:v 500k -dash 1 video_320x180_500k.webm -an -vf scale=640:360 -b:v 750k -dash 1 video_640x360_750k.webm -an -vf scale=640:360 -b:v 1000k -dash 1 video_640x360_1000k.webm -an -vf scale=1280:720 -b:v 1500k -dash 1 video_1280x720_1500k.webm
I’m converting a single video into multiple videos at different resolutions. But it’s painfully slow. how can I speed this up ?