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Autres articles (75)

  • Submit enhancements and plugins

    13 avril 2011

    If you have developed a new extension to add one or more useful features to MediaSPIP, let us know and its integration into the core MedisSPIP functionality will be considered.
    You can use the development discussion list to request for help with creating a plugin. As MediaSPIP is based on SPIP - or you can use the SPIP discussion list SPIP-Zone.

  • Contribute to translation

    13 avril 2011

    You can help us to improve the language used in the software interface to make MediaSPIP more accessible and user-friendly. You can also translate the interface into any language that allows it to spread to new linguistic communities.
    To do this, we use the translation interface of SPIP where the all the language modules of MediaSPIP are available. Just subscribe to the mailing list and request further informantion on translation.
    MediaSPIP is currently available in French and English (...)

  • L’utiliser, en parler, le critiquer

    10 avril 2011

    La première attitude à adopter est d’en parler, soit directement avec les personnes impliquées dans son développement, soit autour de vous pour convaincre de nouvelles personnes à l’utiliser.
    Plus la communauté sera nombreuse et plus les évolutions seront rapides ...
    Une liste de discussion est disponible pour tout échange entre utilisateurs.

Sur d’autres sites (5202)

  • How to save data of packet.data using ffmpeg && c language ?

    12 juin 2015, par patrick

    I’m try to build an app in c that extract audio from video and save it as audio file. I’m able to extract the audio but now the problem is how to save it. I wrote the code given below but it’s giving me an segmentation fault. Thanks in advance.

    My code is :

    AVOutputFormat* fmt = av_guess_format("mp3", NULL, NULL);;
    
AVFormatContext* oc = avformat_alloc_context();
    
oc->oformat = fmt;
    
avio_open2(&oc->pb, "test.mp3", AVIO_FLAG_WRITE,NULL,NULL);
    

    
AVStream* stream=NULL;
    
int cnt = 0;
    

    
while(av_read_frame(pFormatCtx, &packet)>=0) { //pFormatCtx is input file format context.
    
    if (packet.stream_index==audioStream) {
    
    int got_frame = 0;
    
    if (avcodec_decode_audio4(pCodecCtx, pFrame, &got_frame, &packet) < 0) {
    
        fprintf(stderr, "Error encoding frame\n");
    
                exit(1);
    
        }
    

    
        if(got_frame) {
    
        if (av_interleaved_write_frame(oc, &packet) < 0) {
    
                printf(stderr, "Error writing frame\n");
    
                    exit(1);
    
                }
    
        }
    
    }
    
    av_free_packet(&packet);
    
    av_init_packet(&packet);
    
}

  • How to save data of packet.data in ffmpeg using c language ?

    10 juin 2015, par patrick

    I’m try to build an app in c that extract audio from video and save it as audio file. I write the below code. I’m able to extract the audio but now the problem is how to save it. Thanks in advance.

    My code is :

    int main(int argc, char *argv[]) {
    
AVFormatContext *pFormatCtx = NULL;
    
int             i;
    
AVCodecContext  *pCodecCtx = NULL;
    
AVCodec         *pCodec = NULL;
    
AVFrame         *pFrame = NULL; 
    
AVPacket        packet;
    

    
AVDictionary    *optionsDict = NULL;
    

    
if(argc < 2) {
    
printf("Please provide a movie file\n");
    
return -1;
    
}
    
av_register_all();
    
if(avformat_open_input(&pFormatCtx, argv[1], NULL, NULL)!=0)
    
return -1; 
    

    
if(avformat_find_stream_info(pFormatCtx, NULL)<0)
    
return -1; 
    

    
av_dump_format(pFormatCtx, 0, argv[1], 0);
    

    
int audioStream=-1;
    
for(i=0; inb_streams; i++)
    
    if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
    
        audioStream=i;
    
        break;
    
    }
    
if(audioStream==-1)
    
return -1; 
    

    
pCodecCtx=pFormatCtx->streams[audioStream]->codec;
    

    
pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
    
if(pCodec==NULL) {
    
    fprintf(stderr, "Unsupported codec!\n");
    
    return -1; // Codec not found
    
}
    

    
if(avcodec_open2(pCodecCtx, pCodec, &optionsDict)<0)
    
return -1; 
    

    
pFrame=avcodec_alloc_frame();
    
packet.data = NULL;
    
packet.size = 0;
    

    
while(av_read_frame(pFormatCtx, &packet)>=0) {
    
    int got_frame = 0;
    
    int ret = avcodec_decode_audio4(pCodecCtx, pFrame, &got_frame, &packet);
    
    if(got_frame && packet.stream_index==audioStream) {
    
        //save result but how???
    
    }
    
    av_free_packet(&packet);
    
}
    
av_free(pFrame);
    
avcodec_close(pCodecCtx);
    
avformat_close_input(&pFormatCtx);
    
return 0;
    
}

  • ffmpeg : how to save h264 raw data as mp4 file

    15 avril 2016, par monkid

    I encode h264 data by libavcodec.
    ex.

    while (1) {
    
  ...
    
  avcodec_encode_video(pEnc->pCtx, OutBuf, ENC_OUTSIZE, pEnc->pYUVFrame);
    
  ...
    
}

    If I directly save OutBuf data as a .264 file, it can`t be play by player. Now I want to save OutBuf

    as a mp4 file. Anyone know how to do this by ffmpeg lib ? thanks.

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