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Autres articles (61)
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List of compatible distributions
26 avril 2011, parThe table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...) -
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. -
Gestion générale des documents
13 mai 2011, parMédiaSPIP ne modifie jamais le document original mis en ligne.
Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)
Sur d’autres sites (3764)
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php shell_exec() command pop out error and permission denied ffmpeg
3 juin 2023, par user3711175This is the main index.php file where I run my code to generate a video thumbnail with ffmpeg but it has no lucks at all I have been searching online for a lot of solution but nothing comes out i will be very appreciate if you guys can help me out. The shell_exec() keep giving me error







<form action="index.php" method="POST" enctype="multipart/form-data">
<input type="file" /><input type="submit" value="upload" />

</form>

<?php

if(isset($_POST['submit'])){


$ffmpeg = "/Users/mac/Documents/ffmpeg/3.1.4/bin/ffmpeg";
$videoFile = $_FILES["file"]["tmp_name"];
$imageFile = "1.jpg";
$size = "320x240";
$getFromSecond = 5;
$cmd = "$ffmpeg -i $videoFile -an -ss $getFromSecond -s $size $imageFile 2>&1";

 echo shell_exec($cmd);


echo shell_exec('whoami');
if(!shell_exec($cmd)){


 echo "thumbnail created";
}else{
 echo "error creating thumbnail";
}






}

?>





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php shell_exec() command pop out error and permission denied ffmpeg
19 octobre 2016, par user3711175This is the main index.php file where I run my code to generate a video thumbnail with ffmpeg but it has no lucks at all I have been searching online for a lot of solution but nothing comes out i will be very appreciate if you guys can help me out. The shell_exec() keep giving me error
<form action="index.php" method="POST" enctype="multipart/form-data">
<input type="file" /><input type="submit" value="upload" />
</form>
<?php
if(isset($_POST['submit'])){
$ffmpeg = "/Users/mac/Documents/ffmpeg/3.1.4/bin/ffmpeg";
$videoFile = $_FILES["file"]["tmp_name"];
$imageFile = "1.jpg";
$size = "320x240";
$getFromSecond = 5;
$cmd = "$ffmpeg -i $videoFile -an -ss $getFromSecond -s $size $imageFile 2>&1";
echo shell_exec($cmd);
echo shell_exec('whoami');
if(!shell_exec($cmd)){
echo "thumbnail created";
}else{
echo "error creating thumbnail";
}
}
?> -
Low latency video streaming on android
17 mai 2021, par Louis BlennerI'd like to be able to stream the video from my webcam to an Android app with a latency below 500ms, on my local network.


To capture and send the video over the network, I use ffmpeg.


ffmpeg -f v4l2 -i /dev/video0 -preset ultrafast -tune zerolatency -vcodec libx264 -an -vf format=yuv420p -f mpegts udp://192.168.1.155:5000


This command takes the webcam as an input, convert it and send it to a device using the mpegts protocol.


I am able to read the video on another PC with a latency below 500 ms, using commands like


gst-launch-1.0 -v udpsrc port=5000 ! video/mpegts ! tsdemux ! h264parse ! avdec_h264 ! fpsdisplaysink sync=false


or


mpv udp://0.0.0.0:5000 --no-cache --untimed --no-demuxer-thread --video-sync=audio --vd-lavc-threads=1 


So it is possible to have this range of latency.

I'd like to have the same thing on Android.

Here are my tries to do that.


Exoplayer


After looking at the different players available on Android studio, it seems like Exoplayer is the go-to choice.

I tried different options indicated in the live-streaming documentation, but I always end up with a stream taking seconds to start and with a latency of seconds.

I tried to add a Button to seek to the default position of the windows, but it results in a loading of several seconds.

DefaultExtractorsFactory extractorsFactory =
 new DefaultExtractorsFactory()
 .setTsExtractorFlags(DefaultTsPayloadReaderFactory.FLAG_IGNORE_AAC_STREAM);

 player = new SimpleExoPlayer.Builder(this)
 .setMediaSourceFactory(
 new DefaultMediaSourceFactory(this, extractorsFactory))
 .setLoadControl(new DefaultLoadControl.Builder()
 .setBufferDurationsMs(DefaultLoadControl.DEFAULT_MIN_BUFFER_MS, DefaultLoadControl.DEFAULT_MAX_BUFFER_MS, 200, 200)
 .build())
 .build();
 MyPlayerView playerView = findViewById(R.id.player_view);
 // Bind the player to the view.
 playerView.setPlayer(player);
 // Build the media item.
 MediaItem mediaItem = new MediaItem.Builder()
 .setUri(Uri.parse("udp://0.0.0.0:5000"))
 .setLiveMaxOffsetMs(500)
 .setLiveTargetOffsetMs(0)
 .setLiveMinOffsetMs(0)
 .build();
 // Set the media item to be played.
 player.setMediaItem(mediaItem);
 // Prepare the player.
 player.setPlayWhenReady(true);
 player.prepare();
 //player.seekToDefaultPosition();


This issue is about the same issue and the conclusion was that Exoplayer was not fit for this use case.




I'll be honest, ultra low-latency like this isn't ExoPlayer's main use-case




Vlc


Another try was to use the Vlc library.

But I was unable to have the same low latency stream as with the two previous example with Vlc.

I tried changing the preferences of Vlc to stream as fast as possible.

Input/Codecs -> x264 preset: ultrafast - zerolatency
Input/Codecs -> Access Module: UDP input
Input/Codecs -> Clock Jitter: 500
Audio: disable audio


I also tried reducing the different buffers.

However, I still have a latency of more than 1 seconds with that.

Gstreamer


Another try was to create a react-native project to use the different players available here.

One player that seemed promising was react-native-gstreamer because it uses gstreamer which is able to stream with low latency (gst-launch command).

But the library is now outdated.

Question


There were other tries, but none were successful.

Is there a problem with one of my approaches ?

And if not, Is there a player on Android (that I missed) which is able to achieve low latency stream like gstream or mpv on linux ?

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