Recherche avancée

Médias (1)

Mot : - Tags -/ticket

Autres articles (99)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP 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 (...)

Sur d’autres sites (7044)

  • What is Video Lagrange factor and how to achieve Constant bit rate ?

    12 décembre 2011, par Tarun

    I want to perform transcoding using FFMPEG. My target is to acheive CBR i.e Constant bit rate. But even using option like -maxrate and -minrate I am unable to acheive it.
    I know when converting to x264 if I choose CBR, it will deteriorate the video quality but I am OK with it since I want to use it for streaming.

    Please help me asap

  • Separate mxf_essence_container_uls for audio and video.

    10 décembre 2011, par Carl Eugen Hoyos

    Separate mxf_essence_container_uls for audio and video.

  • How can I capture audio AND video simultenaous with ffmpeg from an USB capture device

    5 octobre 2011, par oban

    I'm capturing a video by means of an USB Terratec Grabster AV350 (which is based on the em2860 chip).

    I don't succeed to get the audio when it is played . If I play the captured video with vlc or with ffplay I got only 3 seconds sound and then a silence for the rest of the video ...

    During the capturing I don't get any errors. At the end it indicates the size of the video and audio captured ....

    I'm using the ffmpeg command for this :

    ffmpeg -f alsa -ac 2 -i hw:3 -f video4linux2 -i /dev/video0 -acodec ac3 -ab 128k -vcodec mpeg4 -b 6000k -r 25 test5.avi

    The log is :

    [alsa @ 0x9bcd420]Estimating duration from bitrate, this may be inaccurate
    Input #0, alsa, from 'hw:3' :
    Duration : N/A, start : 69930.998994, bitrate : N/A
    Stream #0.0 : Audio : pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
    [video4linux2 @ 0x9bf5d30]Estimating duration from bitrate, this may be inaccurate
    Input #1, video4linux2, from '/dev/video0' :
    Duration : N/A, start : 1307111377.654173, bitrate : -2147483 kb/s
    Stream #1.0 : Video : rawvideo, yuyv422, 720x576, -2147483 kb/s, 1000k tbr, 1000k tbn, 1000k tbc
    [ac3 @ 0x9bf9590]No channel layout specified. The encoder will guess the layout, but it might be incorrect.
    Output #0, avi, to 'test5.avi' :
    Metadata :
    ISFT : Lavf52.64.2
    Stream #0.0 : Video : mpeg4, yuv420p, 720x576, q=2-31, 6000 kb/s, 25 tbn, 25 tbc
    Stream #0.1 : Audio : ac3, 44100 Hz, stereo, s16, 128 kb/s
    Stream mapping :
    Stream #1.0 -> #0.0
    Stream #0.0 -> #0.1
    Press [q] to stop encoding
    frame= 1283 fps= 25 q=2.3 Lsize= 38677kB time=51.32 bitrate=6173.9kbits/s
    video:37755kB audio:846kB global headers:0kB muxing overhead 0.198922%

    If I reduce the command for only capturing audio, then the audio file can be played successfully :

    ffmpeg -f alsa -ac 2 -i hw:3,0 -acodec ac3 -ab 128k test5.avi

    [alsa @ 0x8ede420]Estimating duration from bitrate, this may be inaccurate
    Input #0, alsa, from 'hw:3,0' :
    Duration : N/A, start : 70395.998935, bitrate : N/A
    Stream #0.0 : Audio : pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
    [ac3 @ 0x8eebac0]No channel layout specified. The encoder will guess the layout, but it might be incorrect.
    Output #0, avi, to 'test5.avi' :
    Metadata :
    ISFT : Lavf52.64.2
    Stream #0.0 : Audio : ac3, 44100 Hz, stereo, s16, 128 kb/s
    Stream mapping :
    Stream #0.0 -> #0.0
    Press [q] to stop encoding
    size= 227kB time=13.62 bitrate= 136.8kbits/s
    video:0kB audio:213kB global headers:0kB muxing overhead 6.902375%

    If I run the command for only video capturing then vlc or ffplay can play the video successfully :

    ffmpeg -f video4linux2 -i /dev/video0 -vcodec mpeg4 -b 12000k -r 25 test5.avi

    [video4linux2 @ 0x91d6420]Estimating duration from bitrate, this may be inaccurate
    Input #0, video4linux2, from '/dev/video0' :
    Duration : N/A, start : 1307112044.025687, bitrate : -2147483 kb/s
    Stream #0.0 : Video : rawvideo, yuyv422, 720x576, -2147483 kb/s, 1000k tbr, 1000k tbn, 1000k tbc
    Output #0, avi, to 'test5.avi' :
    Metadata :
    ISFT : Lavf52.64.2
    Stream #0.0 : Video : mpeg4, yuv420p, 720x576, q=2-31, 12000 kb/s, 25 tbn, 25 tbc
    Stream mapping :
    Stream #0.0 -> #0.0
    Press [q] to stop encoding
    frame= 388 fps= 25 q=2.0 Lsize= 12963kB time=15.52 bitrate=6842.5kbits/s
    video:12949kB audio:0kB global headers:0kB muxing overhead 0.114584%

    Strange behaviour I noticed is that when I tried capturing video and audio, I can not capture the audio afterwards any more,
    unless I unplug the AV350 first.

    The G350 is located at card 3 :

    htpc@htpc-01 :/proc/asound/G350/pcm0c$ more info
    card : 3
    device : 0
    subdevice : 0
    stream : CAPTURE
    id : USB Audio
    name : USB Audio
    subname : subdevice #0
    class : 0
    subclass : 0
    subdevices_count : 1
    subdevices_avail : 1

    The OS is a Linux 2.6.38-8-generic with the Ubuntu Natty Narwhal version

    Any help on how to tackle this issue would be great ....

    Thanks !

Navigation