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Médias (1)
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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (45)
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Librairies et logiciels spécifiques aux médias
10 décembre 2010, parPour un fonctionnement correct et optimal, plusieurs choses sont à prendre en considération.
Il est important, après avoir installé apache2, mysql et php5, d’installer d’autres logiciels nécessaires dont les installations sont décrites dans les liens afférants. Un ensemble de librairies multimedias (x264, libtheora, libvpx) utilisées pour l’encodage et le décodage des vidéos et sons afin de supporter le plus grand nombre de fichiers possibles. Cf. : ce tutoriel ; FFMpeg avec le maximum de décodeurs et (...) -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...) -
De l’upload à la vidéo finale [version standalone]
31 janvier 2010, parLe chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
Upload et récupération d’informations de la vidéo source
Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)
Sur d’autres sites (8470)
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Faster way to write image to Process.StandardInput.BaseStream
4 septembre 2012, par HasibiiIm trying to send a lot of desktop captured images to an encoders (FFmpeg) stdin.
The following code example works.
the
CaptureScreen()
function provides an image in 5-10 ms.If I save the image in a MemoryStream it takes almost no time.
But I can only save 1 image every 45 ms to
proc.StandardInput.BaseStream.public void Start(string bitrate, string buffer, string fps, string rtmp, string resolution, string preset)
{
proc.StartInfo.FileName = myPath + "\\ffmpeg.exe";
proc.StartInfo.Arguments = "-f image2pipe -i pipe:.bmp -vcodec libx264 -preset " + preset + " -maxrate " + bitrate + "k -bufsize " +
buffer + "k -bt 10 -r " + fps + " -an -y test.avi"; //+ rtmp;
proc.StartInfo.UseShellExecute = false;
proc.StartInfo.RedirectStandardInput = true;
proc.StartInfo.RedirectStandardOutput = true;
proc.Start();
Stopwatch st = new Stopwatch();
BinaryWriter writer = new BinaryWriter(proc.StandardInput.BaseStream);
System.Drawing.Image img;
st.Reset();
st.Start();
for (int z = 0; z < 100; z++)
{
img = ScrCap.CaptureScreen();
img.Save(writer.BaseStream, System.Drawing.Imaging.ImageFormat.Bmp);
img.Dispose();
}
st.Stop();
System.Windows.Forms.MessageBox.Show(st.ElapsedMilliseconds.ToString());
}The question is :
Can I do the saving process faster ?
I try to get stable 60 fps this way
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run ffmpeg from PHP web script
18 février 2014, par it6I need to manage the recording/capture of a website mindwhile it is running a slide-show to get videos form these slides.
My approach is :
<?php
define('FFMPEG_LIBRARY', '/usr/bin/ffmpeg ');
$ffmpegcmd = "ffmpeg -f x11grab -r 25 -s 800x600 -i :0.0 /tmp/output.mpg";
shell_exec($ffmpegcmd);
?>But i get this error from php error log :
[x11grab @ 0x81e8aa0] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 800 height: 600
No protocol specified
No protocol specified
[x11grab @ 0x81e8aa0] Could not open X display.
:0.0: Input/output errorSimilar command from console run good.
Please, any help to get display and be able to control ffmpeg from browser php script ?
Thanks in advance.
thanks for your time.
I got rid the X display error, but not I still haven't got the capture.
Using xvfb I get an unknown file at /tmp written by www-data user :
rw-r—r— 1 www-data www-data 11252 Sep 12 09:49 server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm
Running startx I got also an unknown file at /tmp
rw------- 1 www-data www-data 59 Sep 12 09:53 serverauth.oLcFlG7tXC
any of both grow in size so it is not capturing anything. The content is some binary thing.
What are those files about ?What I am trying is to write a script in which I can control the time ffmpeg is capturing the desktop to create a video from a jquery slide displayed on a website.
My try from console is closer, but if I can do it by browser I will be able to know when to stop sending an AJAX request once the slide is finished.
This is my try from console :
#!/bin/bash
# start the slide website: I will need to change it to control by querystring the language and course level
firefox http://www.languagecourse.net/vocabulary-trainer.php &
# start recording: I will need to adjust the frame to capture
ffmpeg -f x11grab -r 25 -s 800x600 -i :0.0 /tmp/output2.mpg &
# since I can't control the time a course takes I pause an arbitrary time
sleep 5
# look for the capture PID and close it
for i in $(ps aux | grep ffmpeg | sed "s/ */#/g" | cut -f2 -d#)
do
echo "proceso $i killed"
kill -9 $i
doneI wonder once the website is opened I can continue doing the control from AJAX, but not know if I will be able to get the ffmpeg PID to stop the command.
I will appreciate any kind of comments.
Regards,
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Convert swf file to mp4 file using FFMPEG [migrated]
24 septembre 2012, par user1624004I now want to show an html5 video on a html page.
Now I have an sample.swf file, I want to convert it to .mp4 or .ogg or .webm file.
I have tried :
ffmpeg -i sample.swf sample.mp4
But I got this error :
[swf @ 0000000001feef40] Could not find codec parameters for stream 0 (Audio: pcm_s16le, 5512 Hz, 1 channels, 88 kb/s): unspecified sample format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[swf @ 0000000001feef40] Estimating duration from bitrate, this may be inaccurate
Guessed Channel Layout for Input Stream #0.0 : mono
Input #0, swf, from 'sample.swf':
Duration: N/A, bitrate: N/A
Stream #0:0: Audio: pcm_s16le, 5512 Hz, mono, 88 kb/s
Stream #0:1: Video: mjpeg, yuvj444p, 1024x768 [SAR 100:100 DAR 4:3], 16 fps, 16 tbr, 16 tbn
File 'sample.mp4' already exists. Overwrite ? [y/N] y
Invalid sample format '(null)'
Error opening filters!