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    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • 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.

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

Sur d’autres sites (6069)

  • av_read_frame() in ffmpeg returns -5 while receiving UDP data [closed]

    26 février 2024, par zttang

    I'm working on an app which is using ffmpeg lib. There is a living source keep sending TS stream thru udp. Then I allocated a thread use ffmpeg receive the TS packets. the code for this thread is like :

    


    void* av_source_thread(void *data) {
    char udp_url[50];
    snprintf(udp_url, sizeof(udp_url), "udp://127.0.0.1:12345");
    AVDictionary* options = NULL;
    av_dict_set(&options, "timeout", "500000", 0);  // timeout=0.5s
    av_dict_set(&options, "overrun_nonfatal", "1", 0);
    av_dict_set(&options, "fifo_size", "278876", 0);  //50MB

    AVFormatContext *ffmpeg_source = avformat_alloc_context();
    while (running) {
        if (avformat_open_input(&ffmpeg_source, udp_url, NULL, &options) != 0) {
            continue;
        } else {
            break;
        }
    }
    // Some code fill codec type and alloc context here

    av_format_inject_global_side_data(ffmpeg_source);
    AVPacket *packet = av_packet_alloc();
    while (running) {
        ret = av_read_frame(ffmpeg_source, packet);
        if (ret < 0) {
            char errbuf[AV_ERROR_MAX_STRING_SIZE];
            av_strerror(ret, errbuf, AV_ERROR_MAX_STRING_SIZE);
            usleep(10000);
            log("av_read_frame failed, Exit, %s, %d", errbuf, ret);
            continue;
        }
        putPkt2Q(packet);  
    }
    av_packet_free(&packet);
    avformat_close_input(&ffmpeg_source);
    av_dict_free(&options);
    return nullptr;
}


    


    Then the packets will be sent to Q and other thread will process them. but when I run the program, the av_read_frame will return -5(I/O error) from time to time. and once it returned -5, it can not recover unless I restart this thread.

    


    since this is a real time source, so lost some frames are acceptable, I just want to know how to avoid this kind of issue or how to recover without restart the whole thread. I tried to increase the fifo_size in options, but it does not work.

    


  • avcodec_decode_video2 RETURNS THE VALUE -1094995529 in the threaded function

    2 février 2016, par Whoami

    I am developing rtsp streaming player, and followed the below approach.

    1) Read packet, decode, display -> works perfectly.

    while (1) {
    
    if ( av_read_frame(pFormatCtx, &packet) >= 0) {
    
        if (packet.stream_index == videoStream) {
    
            retDecoder = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
    
            if  ( retDecoder <= 0)
    
                LOGD (" Unable to Decode...retval %d ", retDecoder);
    
            if (frameFinished) {
    
            }
    
        }
    
        av_free_packet (&packet);
    
    }
    
}

    Whereas,

    I introduced two threads, one is reading and pushing into the queue and the second one is reading from the queue.

    My problem is while reading the same packet, and decode, i m unable to decode, the return value of the av_video_decode2 is -1094995529.

    Below is the short description of code. Kindly help to solve this issue ?.

    AVPacketList *firstNode=NULL, *lastNode=NULL;
    

    
int pushPacket (AVPacket * pkt)
    
{
    
    AVPacketList *newNode = av_malloc(sizeof(AVPacketList));
    
    newNode->pkt = *pkt;
    
    newNode->next = NULL;
    

    
    SDL_LockMutex (rwMutex);
    

    
    if (lastNode != NULL )  {
    
        lastNode->next = newNode;
    
        lastNode = newNode;
    
    } else {
    
        firstNode = lastNode = newNode;
    
    }
    

    
 SDL_UnlockMutex (rwMutex);
    
}
    

    
int pullPacket ()
    
{
    
    AVPacketList *tempNode;
    
    AVPacket *pkt;
    
    int res=0;
    

    
    SDL_LockMutex (rwMutex);
    
    if ( firstNode != NULL ) {
    
        tempNode = firstNode;
    
        *pkt = tempNode->pkt;
    
        res = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, pkt);  // HERE IS THE PROBLEM.
    
        if (frameFinished) {
    
            LOGD (" fRAME DECODED.. %d \n", counter++);
    
        }
    

    
        if (firstNode->next != NULL) {   
    
            firstNode = firstNode->next;
    
        }
    
        else {
    
            firstNode = NULL;
    
            lastNode = NULL;
    
        }
    
        av_free (tempNode);
    
    }
    
}

    In Thread 1 :

    int PacketReader (void *ptr)
    
{
    
    AVPacket pkt1, *rpacket;
    
    rpacket = &pkt1;
    
    while (globalQuit != 0)  {
    
        if ( av_read_frame(pFormatCtx, rpacket) >= 0) {
    
            if (packet.stream_index == videoStream) {
    
                pushPacket (rpacket);
    
            }
    
            av_free_packet(rpacket);
    
        }
    
    }
    
}

    In thread 2 :

    while (1) {
    
   pullPacket ();
    
}

  • av_video_decode2 RETURNS THE VALUE -1094995529 in the threaded function

    24 mai 2014, par Whoami

    I am developing rtsp streaming player, and followed the below approach.

    1) Read packet, decode, display -> works perfectly.

    while (1) {
    
    if ( av_read_frame(pFormatCtx, &packet) >= 0) {
    
        if (packet.stream_index == videoStream) {
    
            retDecoder = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
    
            if  ( retDecoder <= 0)
    
                LOGD (" Unable to Decode...retval %d ", retDecoder);
    
            if (frameFinished) {
    
            }
    
        }
    
        av_free_packet (&packet);
    
    }
    
}

    Whereas,

    I introduced two threads, one is reading and pushing into the queue and the second one is reading from the queue.

    My problem is while reading the same packet, and decode, i m unable to decode, the return value of the av_video_decode2 is -1094995529.

    Below is the short description of code. Kindly help to solve this issue ?.

    AVPacketList *firstNode=NULL, *lastNode=NULL;
    

    
int pushPacket (AVPacket * pkt)
    
{
    
    AVPacketList *newNode = av_malloc(sizeof(AVPacketList));
    
    newNode->pkt = *pkt;
    
    newNode->next = NULL;
    

    
    SDL_LockMutex (rwMutex);
    

    
    if (lastNode != NULL )  {
    
        lastNode->next = newNode;
    
        lastNode = newNode;
    
    } else {
    
        firstNode = lastNode = newNode;
    
    }
    

    
 SDL_UnlockMutex (rwMutex);
    
}
    

    
int pullPacket ()
    
{
    
    AVPacketList *tempNode;
    
    AVPacket *pkt;
    
    int res=0;
    

    
    SDL_LockMutex (rwMutex);
    
    if ( firstNode != NULL ) {
    
        tempNode = firstNode;
    
        *pkt = tempNode->pkt;
    
        res = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, pkt);  // HERE IS THE PROBLEM.
    
        if (frameFinished) {
    
            LOGD (" fRAME DECODED.. %d \n", counter++);
    
        }
    

    
        if (firstNode->next != NULL) {   
    
            firstNode = firstNode->next;
    
        }
    
        else {
    
            firstNode = NULL;
    
            lastNode = NULL;
    
        }
    
        av_free (tempNode);
    
    }
    
}

    In Thread 1 :

    int PacketReader (void *ptr)
    
{
    
    AVPacket pkt1, *rpacket;
    
    rpacket = &pkt1;
    
    while (globalQuit != 0)  {
    
        if ( av_read_frame(pFormatCtx, rpacket) >= 0) {
    
            if (packet.stream_index == videoStream) {
    
                pushPacket (rpacket);
    
            }
    
            av_free_packet(rpacket);
    
        }
    
    }
    
}

    In thread 2 :

    while (1) {
    
   pullPacket ();
    
}

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