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La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...) -
Script d’installation automatique de MediaSPIP
25 avril 2011, parAfin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
Vous devez bénéficier d’un accès SSH à votre serveur et d’un compte "root" afin de l’utiliser, ce qui permettra d’installer les dépendances. Contactez votre hébergeur si vous ne disposez pas de cela.
La documentation de l’utilisation du script d’installation (...) -
Encodage et transformation en formats lisibles sur Internet
10 avril 2011MediaSPIP transforme et ré-encode les documents mis en ligne afin de les rendre lisibles sur Internet et automatiquement utilisables sans intervention du créateur de contenu.
Les vidéos sont automatiquement encodées dans les formats supportés par HTML5 : MP4, Ogv et WebM. La version "MP4" est également utilisée pour le lecteur flash de secours nécessaire aux anciens navigateurs.
Les documents audios sont également ré-encodés dans les deux formats utilisables par HTML5 :MP3 et Ogg. La version "MP3" (...)
Sur d’autres sites (8046)
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fftools/ffmpeg : use a bsf list instead of individual bsfs
17 avril 2020, par Marton Balint -
How to HLS-live-stream incoming batches of individual frames, "appending" to a m3u8 playlist in real time, with ffmpeg ?
20 novembre 2024, par RobMy overall goal :



Server-side :



- 

- I have batches of sequential, JPEG-encoded frames (8-16) arriving from time to time, generated at roughly 2 FPS.
- I would like to host an HLS live stream, where, when a new batch of frames arrives, I encode those new frames as h264
.tssegments withffmpeg, and have the new.tssegments automatically added to an HLS stream (e.g..m3u8file).







Client/browser-side :



- 

- When the
.m3u8is updated, I would like the video stream being watched to simply "continue", advancing from the point where new.tssegments have been added. - I do not need the user to scrub backwards in time, the client just needs to support live observation of the stream.










My current approach :



Server-side :



To generate the "first" few segments of the stream, I'm attempting the below (just command-line for now to get ffmpeg working right, but ultimately will be automated via a Python script) :



For reference, I'm using ffmpeg version 3.4.6-0ubuntu0.18.04.1.



ffmpeg -y -framerate 2 -i /frames/batch1/frame_%d.jpg \
 -c:v libx264 -crf 21 -preset veryfast -g 2 \
 -f hls -hls_time 4 -hls_list_size 4 -segment_wrap 4 -segment_list_flags +live video/stream.m3u8



where the
/frames/batch1/folder contains a sequence of frames (e.g. frame_01.jpg, frame_02.jpg, etc...). This already doesn't appear to work correctly, because it keeps adding#EXT-X-ENDLISTto the end of the.m3u8file, which as I understand is not correct for a live HLS stream - here's what that generates :


#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:4
#EXT-X-MEDIA-SEQUENCE:0
#EXTINF:4.000000,
stream0.ts
#EXTINF:4.000000,
stream1.ts
#EXTINF:2.000000,
stream2.ts
#EXT-X-ENDLIST



I can't figure out how to suppress
#EXT-X-ENDLISThere - this is problem #1.


Then, to generate subsequent segments (e.g. when new frames become available), I'm trying this :



ffmpeg -y -framerate 2 -start_number 20 -i /frames/batch2/frame_%d.jpg \
 -c:v libx264 -crf 21 -preset veryfast -g 2 \
 -f hls -hls_time 4 -hls_list_size 4 -segment_wrap 4 -segment_list_flags +live video/stream.m3u8



Unfortunately, this does not work the way I want it to. It simply overwrites
stream.m3u8, does and does not advance#EXT-X-MEDIA-SEQUENCE, it does not index the new.tsfiles correctly, and it also includes the undesirable#EXT-X-ENDLIST- this is the output of that command :


#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:4
#EXT-X-MEDIA-SEQUENCE:0
#EXTINF:4.000000,
stream0.ts
#EXTINF:4.000000,
stream1.ts
#EXTINF:3.000000,
stream2.ts
#EXT-X-ENDLIST



Fundamentally, I can't figure out how to "append" to an existing
.m3u8in a way that makes sense for HLS live streaming. That's essentially problem #2.


For hosting the stream, I'm using a simple Flask app - which appears to be working the way I intend - here's what I'm doing for reference :



@app.route('/video/')
def stream(file_name):
 video_dir = './video'
 return send_from_directory(directory=video_dir, filename=file_name)



Client-side :



I'm trying HLS.js in Chrome - basically boils down to this :



<video></video>

...

<code class="echappe-js"><script src="https://cdn.jsdelivr.net/npm/hls.js@latest"></script>
<script>&#xA; var video = document.getElementById(&#x27;video1&#x27;);&#xA; if (Hls.isSupported()) {&#xA; var hls = new Hls();&#xA; hls.loadSource(&#x27;/video/stream.m3u8&#x27;);&#xA; hls.attachMedia(video);&#xA; hls.on(Hls.Events.MANIFEST_PARSED, function() {&#xA; video.play();&#xA; });&#xA; }&#xA; else if (video.canPlayType(&#x27;application/vnd.apple.mpegurl&#x27;)) {&#xA; video.src = &#x27;/video/stream.m3u8&#x27;;&#xA; video.addEventListener(&#x27;loadedmetadata&#x27;, function() {&#xA; video.play();&#xA; });&#xA; }&#xA;</script>



I'd like to think that what I'm trying to do doesn't require a more complex approach than what I'm trying above, but since what I'm trying to far definitely isn't working, I'm starting to think I need to come at this from a different angle. Any ideas on what I'm missing ?



Edit :



I've also attempted the same (again in Chrome) with
video.js, and am seeing similar behavior - in particular, when I manually update the backingstream.m3u8(with no#EXT-X-ENDLISTtag),videojsnever picks up the new changes to the live stream, and just buffers/hangs indefinitely.


<video class="video-js vjs-default-skin" muted="muted" controls="controls">
 <source type="application/x-mpegURL" src="/video/stream.m3u8">
</source></video>

...

<code class="echappe-js"><script>&#xA; var player = videojs(&#x27;video1&#x27;);&#xA; player.play();&#xA;</script>



For example, if I start with this initial version of
stream.m3u8:


#EXTM3U
#EXT-X-PLAYLIST-TYPE:EVENT
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:8
#EXT-X-MEDIA-SEQUENCE:0
#EXTINF:4.000000,
stream0.ts
#EXTINF:4.000000,
stream1.ts
#EXTINF:2.000000,
stream2.ts



and then manually update it server-side to this :



#EXTM3U
#EXT-X-PLAYLIST-TYPE:EVENT
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:8
#EXT-X-MEDIA-SEQUENCE:3
#EXTINF:4.000000,
stream3.ts
#EXTINF:4.000000,
stream4.ts
#EXTINF:3.000000,
stream5.ts



the video.js control just buffers indefinitely after only playing the first 3 segments (stream*.ts 0-2), which isn't what I'd expect to happen (I'd expect it to continue playing stream*.ts 3-5 once
stream.m3u8is updated andvideo.jsmakes a request for the latest version of the playlist).

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centos FFmpeg when I am using exec_static it shows only 1 minute live stream
7 janvier 2020, par DAVIT TSILOSANIHello I am using Centos 7 Ngnix RTMP module
and I am using FFmpeg alsoWhen I am streaming using console
Using that command
ffmpeg -re -i http://website......./index.m3u8 -vcodec libx264
-vprofile baseline -g 30 -acodec aac -strict -2 -f flv rtmp ://localhost/show/stream5Everything is fine,
stream is broadcasting livebut when I put it into Ngnix
such as
exec_static ffmpeg -re -i website......./index.m3u8 -vcodec libx264
-vprofile baseline -g 30 -acodec aac -strict -2 -f flv rtmp ://localhost/show/stream5It only shows 1 minute live stream after reloading, it starts over and over and over
Can u tell me what can I do to solve it ?
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