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  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

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  • Libav and xaudio2 - audio not playing

    25 août 2013, par siz

    I am trying to get audio playing with libav using xaudio2. The xaudio2 code I am using works with an older ffmpeg using avcodec_decode_audio2, but that has been deprecated for avcodec_decode_audio4. I have tried following various libav examples, but can't seem to get the audio to play. Video plays fine (or rather it just plays right fast now, as I haven't coded any sync code yet).

    Firstly audio gets init, no errors, video gets init, then packet :

    while (1) {
    
    //is this packet from the video or audio stream?
    
    if (packet.stream_index == player.v_id) {
    
        add_video_to_queue(&packet);
    
    } else if (packet.stream_index == player.a_id) { 
    
        add_sound_to_queue(&packet);
    
    } else {
    
        av_free_packet(&packet);
    
    }
    
}

    Then in add_sound_to_queue :

    int add_sound_to_queue(AVPacket * packet) {
    
AVFrame *decoded_frame = NULL;
    
int done = AVCODEC_MAX_AUDIO_FRAME_SIZE;
    
int got_frame = 0;
    

    
if (!decoded_frame) {
    
    if (!(decoded_frame = avcodec_alloc_frame())) {
    
        printf("[ADD_SOUND_TO_QUEUE] Out of memory\n");
    
        return -1;
    
    }
    
} else {
    
    avcodec_get_frame_defaults(decoded_frame);
    
}
    

    
if (avcodec_decode_audio4(player.av_acodecctx, decoded_frame, &got_frame, packet) < 0)  {
    
    printf("[ADD_SOUND_TO_QUEUE] Error in decoding audio\n");
    
    av_free_packet(packet);
    
    //continue;
    
    return -1;
    
}
    
if (got_frame) {
    
    int data_size;
    
    if (packet->size > done) {
    
        data_size = done;
    
    } else {
    
        data_size = packet->size;
    
    }
    
    BYTE * snd = (BYTE *)malloc( data_size * sizeof(BYTE));
    

    
    XMemCpy(snd,
    
        AudioBytes, 
    
        data_size * sizeof(BYTE)
    
    );
    

    
    XMemSet(&g_SoundBuffer,0,sizeof(XAUDIO2_BUFFER));
    

    
    g_SoundBuffer.AudioBytes = data_size;
    
    g_SoundBuffer.pAudioData = snd;
    
    g_SoundBuffer.pContext = (VOID*)snd;
    

    
    XAUDIO2_VOICE_STATE state;
    
    while( g_pSourceVoice->GetState( &state ), state.BuffersQueued > 60 ) {
    
        WaitForSingleObject( XAudio2_Notifier.hBufferEndEvent, INFINITE );
    
    }
    

    
    g_pSourceVoice->SubmitSourceBuffer( &g_SoundBuffer );
    
}
    
return 0;
    
}

    I can't seem to figure out the problem, I have added error messages in init, opening video, codec handling etc. As mentioned before the xaudio2 code is working with an older ffmpeg, so maybe I have missed something with the avcodec_decode_audio4 ?

    If this snappet of code isn't enough, I can post the whole code, these are just the places in the code I think the problem would be :(

  • avformat/movenchint : revert "Use av_reallocp() where suitable"

    22 septembre 2013, par Michael Niedermayer
    avformat/movenchint : revert "Use av_reallocp() where suitable"

    reverts movenchin part of 5626f994f273af80fb100d4743b963304de9e05c
    
The change left the fields in an inconsistent state
    

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavformat/movenchint.c

  • movenchint : Clear size and len if the realloc failed

    22 septembre 2013, par Martin Storsjö
    movenchint : Clear size and len if the realloc failed

    Previously these were left in an inconsistent state.
    

    Pointed out by Michael Niedermayer.
    

    Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DBH] libavformat/movenchint.c

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