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Autres articles (104)
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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 (...) -
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 (...) -
Ajouter notes et légendes aux images
7 février 2011, parPour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
Modification lors de l’ajout d’un média
Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)
Sur d’autres sites (8399)
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How to transcode webrtc to rtmp ? [on hold]
24 novembre 2015, par yarekI know many attempts have been done but in 2015 I cannot find any that works correctly.
Has someone already done that in real live application ?
(Mybe ffmpeg or gstreamer can help)
I want to transcode a webrtc incoming stream into a RTMP
Regards
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Twitch stream with FFMpeg using multiple audio inputs [on hold]
23 décembre 2014, par Josh RaymondI’m using the following script to try and stream my linux desktop to Twitch.tv, I have the stream working, but I want to throw in 2 audio inputs into the stream (one for the game, and one for my mic)
Here’s the script
#! /bin/bash
INRES="1900x600"
OUTRES="800x600"
INAUD="pulse"
FPS="25
STREAM_KEY=$(cat ~/.twitch_key)
STREAM_URL="rtmp://live.twitch.tv/app/$STREAM_KEY"
ffmpeg \
-f alsa -ac 2 -i "$INAUD" \
-f x11grab -s "$INRES" -r "$FPS" -i :0.0+1280,0 \
-vcodec libx264 -s "$OUTRES" -pix_fmt yuv420p \
-acodec libmp3lame -threads 6 -qscale 5 -b 64KB \
-f flv -ar 44100 "$STREAM_URL"I use Pulseaudio and have pavucontrol, if that matters. The game would be on "Build-in Audio Analog Stereo" and the mic is from the recording device "Webcam C110 Analog Mono"
Thanks in advance.
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How to reduce audio frequency in mp3 format through FFMPEG [on hold]
25 octobre 2014, par internetdopingI want to reduce audio bitrate of my movie in FFMPEG when I use libmp3lame -b:a 16k -ac 1 -ar 44100 it works correctly but when I reduce those to libmp3lame -b:a -16k -ac 1 -ar 8000 I get the error :
Could not write header for output file #0 (incorrect codec parameters ?): Invalid data found when processing input
please advise me how to reduce audio frequency from 44100 to 8000 mp3lame.
The following code is working
ffmpeg -re -ss 00:30:00 -i j:\movie\need4speed.mp4 -preset ultrafast -threads 1 -vcodec libx264 -b:v 20000k -r 24 -g 24 -keyint_min 4 -x264opts "keyint=4:min-keyint=48:no-scenecut" -s 10265*4320 -acodec libmp3lame -b:a 16k -ac 1 -ar 44100 -f flv rtmp://12.11.1.2/livepkgr/need4speed4320p?adbe-live-event=liveevent
The following code IS NOT working
ffmpeg -re -ss 00:30:00 -i j:\movie\need4speed.mp4 -preset ultrafast -threads 1 -vcodec libx264 -b:v 20000k -r 24 -g 24 -keyint_min 4 -x264opts "keyint=4:min-keyint=48:no-scenecut" -s 10265*4320 -acodec libmp3lame -b:a 16k -ac 1 -ar 8000 -f flv rtmp://12.11.1.2/livepkgr/need4speed4320p?adbe-live-event=liveevent
Thanks