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Autres articles (58)

  • 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

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

Sur d’autres sites (10017)

  • Error Converting MOV to MP4 (avconv/ffmpeg)

    29 avril 2014, par user3584988

    I use :

    avconv -i '/INPUT.MOV' -vcodec libx264 -vprofile baseline -acodec aac -strict experimental -r 24 -b 255k -ar 44100 -ab 59k 'OUTPUT.mp4'

    The conversion is done correctly and smoothly plays PC / MAC, but the video does not play on mobile devices.
    Does anyone have the same problem ? How to solve it ?

    Thanks in advance

  • ffmpeg and streaming video - frame time issue

    6 mai 2014, par 4ntoine

    I’ve compiled ffmpeg-android (https://github.com/appunite/AndroidFFmpeg) and it works for files.
    The problem is that it shows nothing for network streams (both rtmp and hls) as frame timestamp is too big and it seems to be not from video beginning (as for file). Then it waits for the first frame time which for network stream is too big :

    player_decode_video copying...
    
05-05 18:11:26.994: INFO/player.c(16998): player_decode_video Decoded video frame: 568.233000, time_base: 51140970
    
05-05 18:11:26.994: INFO/player.c(16998): player_wait_for_frame[0] start
    
...
    
05-05 18:11:30.587: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (568.233000) - (0.000977)
    
05-05 18:11:30.587: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: 568232023
    
05-05 18:11:31.088: INFO/player.c(16998): player_wait_for_frame[0] timeout
    
05-05 18:11:31.088: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (568.233000) - (0.501542)
    
05-05 18:11:31.088: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: 567731458
    
05-05 18:11:31.588: INFO/player.c(16998): player_wait_for_frame[0] timeout
    
05-05 18:11:31.588: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (568.233000) - (1.002778)
    
05-05 18:11:31.588: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: 567230222
    
05-05 18:11:32.089: INFO/player.c(16998): player_wait_for_frame[0] timeout
    
05-05 18:11:32.089: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (568.233000) - (1.504563)
    
05-05 18:11:32.089: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: 566728437
    
05-05 18:11:32.590: INFO/player.c(16998): player_wait_for_frame[0] timeout
    
05-05 18:11:32.590: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (568.233000) - (2.005708)
    
05-05 18:11:32.590: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: 566227292

    also i can’t figure out what timestamp for frame for network stream means (for file frames it’s a time from video beginning)

    for file it’s clear : time_base is frame number and timestamp is time from video beginning and it plays the files :

    player_decode_video Decoded video frame: 0.320000, time_base: 8
    
05-05 18:32:42.344: INFO/player.c(16998): player_wait_for_frame[0] start
    
05-05 18:32:42.344: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (0.320000) - (0.344337)
    
05-05 18:32:42.344: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: -24337
    
05-05 18:32:42.344: INFO/player.c(16998): player_wait_for_frame[0] finish[0]
    
05-05 18:32:42.344: INFO/player.c(16998): player_update_time: 0.346169/4.000000
    
05-05 18:32:42.344: INFO/player.c(16998): player_decode waiting for frame[0]
    
05-05 18:32:42.344: INFO/player.c(16998): player_decode decoding frame[0]
    
05-05 18:32:42.344: INFO/player.c(16998): player_decode_video decoding
    
05-05 18:32:42.344: INFO/player.c(16998): player_decode_video copy wait
    
05-05 18:32:42.344: INFO/player.c(16998): player_read_from_stream Read frame
    
05-05 18:32:42.344: INFO/player.c(16998): player_read_from_stream looking for stream
    
05-05 18:32:42.344: INFO/player.c(16998): player_read_from_stream stream found [0]
    
05-05 18:32:42.344: INFO/player.c(16998): player_read_from_stream waiting for queue
    
05-05 18:32:42.344: INFO/player.c(16998): Format: WINDOW_FORMAT_RGBA_8888
    
05-05 18:32:42.344: INFO/player.c(16998): Buffer: width: 1280, height: 720, stride: 1280
    
05-05 18:32:42.344: INFO/player.c(16998): player_decode_video copying...
    
05-05 18:32:42.425: INFO/player.c(16998): player_decode_video Decoded video frame: 0.360000, time_base: 9
    
05-05 18:32:42.425: INFO/player.c(16998): player_wait_for_frame[0] start
    
05-05 18:32:42.425: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (0.360000) - (0.427994)
    
05-05 18:32:42.425: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: -67994
    
05-05 18:32:42.425: INFO/player.c(16998): player_wait_for_frame[0] finish[0]
    
05-05 18:32:42.425: INFO/player.c(16998): player_update_time: 0.429214/4.000000
    
05-05 18:32:42.425: INFO/player.c(16998): player_decode waiting for frame[0]
    
05-05 18:32:42.425: INFO/player.c(16998): player_decode decoding frame[0]
    
05-05 18:32:42.425: INFO/player.c(16998): player_decode_video decoding
    
05-05 18:32:42.425: INFO/player.c(16998): player_read_from_stream Read frame
    
05-05 18:32:42.425: INFO/player.c(16998): player_read_from_stream looking for stream
    
05-05 18:32:42.425: INFO/player.c(16998): player_read_from_stream stream found [0]
    
05-05 18:32:42.425: INFO/player.c(16998): player_read_from_stream waiting for queue
    
05-05 18:32:42.425: INFO/player.c(16998): player_decode_video copy wait
    
05-05 18:32:42.435: INFO/player.c(16998): Format: WINDOW_FORMAT_RGBA_8888
    
05-05 18:32:42.435: INFO/player.c(16998): Buffer: width: 1280, height: 720, stride: 1280
    
05-05 18:32:42.435: INFO/player.c(16998): player_decode_video copying...
    
05-05 18:32:42.495: INFO/player.c(16998): player_decode_video Decoded video frame: 0.400000, time_base: 10
    
05-05 18:32:42.495: INFO/player.c(16998): player_wait_for_frame[0] start
    
05-05 18:32:42.495: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (0.400000) - (0.494742)
    
05-05 18:32:42.495: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: -94742
    
05-05 18:32:42.495: INFO/player.c(16998): player_wait_for_frame[0] finish[0]
    
05-05 18:32:42.495: INFO/player.c(16998): player_update_time: 0.495993/4.000000
    
05-05 18:32:42.495: INFO/player.c(16998): player_decode waiting for frame[0]
    
05-05 18:32:42.495: INFO/player.c(16998): player_decode decoding frame[0]
    
05-05 18:32:42.495: INFO/player.c(16998): player_decode_video decoding
    
05-05 18:32:42.495: INFO/player.c(16998): player_decode_video copy wait
    
05-05 18:32:42.495: INFO/player.c(16998): player_read_from_stream Read frame
    
05-05 18:32:42.495: INFO/player.c(16998): Format: WINDOW_FORMAT_RGBA_8888
    
05-05 18:32:42.495: INFO/player.c(16998): Buffer: width: 1280, height: 720, stride: 1280
    
05-05 18:32:42.495: INFO/player.c(16998): player_decode_video copying...
    
05-05 18:32:42.495: INFO/player.c(16998): player_read_from_stream looking for stream
    
05-05 18:32:42.495: INFO/player.c(16998): player_read_from_stream stream found [0]
    
05-05 18:32:42.495: INFO/player.c(16998): player_read_from_stream waiting for queue
    
05-05 18:32:42.555: INFO/player.c(16998): player_decode_video Decoded video frame: 0.440000, time_base: 11
    
05-05 18:32:42.555: INFO/player.c(16998): player_wait_for_frame[0] start
    
05-05 18:32:42.555: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (0.440000) - (0.556698)
    
05-05 18:32:42.555: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: -116698
    
05-05 18:32:42.555: INFO/player.c(16998): player_wait_for_frame[0] finish[0]
    
05-05 18:32:42.555: INFO/player.c(16998): player_update_time: 0.557858/4.000000
    
05-05 18:32:42.555: INFO/player.c(16998): player_decode waiting for frame[0]
    
05-05 18:32:42.555: INFO/player.c(16998): player_read_from_stream Read frame
    
05-05 18:32:42.555: INFO/player.c(16998): player_read_from_stream looking for stream
    
05-05 18:32:42.555: INFO/player.c(16998): player_read_from_stream stream found [0]
    
05-05 18:32:42.555: INFO/player.c(16998): player_read_from_stream waiting for queue
    
05-05 18:32:42.555: INFO/player.c(16998): player_decode decoding frame[0]
    
05-05 18:32:42.555: INFO/player.c(16998): player_decode_video decoding
    
05-05 18:32:42.555: INFO/player.c(16998): player_decode_video copy wait
    
05-05 18:32:42.565: INFO/player.c(16998): Format: WINDOW_FORMAT_RGBA_8888
    
05-05 18:32:42.565: INFO/player.c(16998): Buffer: width: 1280, height: 720, stride: 1280
    
05-05 18:32:42.565: INFO/player.c(16998): player_decode_video copying...
    
05-05 18:32:42.625: INFO/player.c(16998): player_decode_video Decoded video frame: 0.480000, time_base: 12

    So what is the meaning of timestamp for stream and what should i change to make it playing streams (rtmp/hls - its can be opened now but it wait for frame time which is far in the future) ?

    UPDATE :

        int64_t pts = av_frame_get_best_effort_timestamp(frame);
    
if (pts == AV_NOPTS_VALUE) {
    
    pts = 0;
    
}
    
int64_t time = av_rescale_q(pts, stream->time_base, AV_TIME_BASE_Q);
    
LOGI(10,
    
        "player_decode_video Decoded video frame: %f, time_base: %" SCNd64,
    
        time/1000000.0, pts);
    
player_wait_for_frame(player, time, stream_no);

    it extracts time which is far in future :

    player_wait_for_frame[0 = Video] = (568.233000) - (0.000977)

    Is it correct ?

  • Decode audio using libavcodec and play using libAO ?

    21 mars 2012, par Ashika Umanga Umagiliya

    I use following code snippet to decode audio files (tested with MP3,WAV,WMV).

    But when it plays the audio , it just gives static sounds and crashes time to time.
    Any hints on what i am doing wrong here ?

    #include 
    
#include 
    
#include 
    
#include 
    

    

    
extern "C" {
    
#include "libavutil/mathematics.h"
    
#include "libavformat/avformat.h"
    
#include "libswscale/swscale.h"
    
#include <ao></ao>ao.h>
    

    
}
    

    
void die(const char *msg)
    
{
    
    fprintf(stderr,"%s\n",msg);
    
    exit(1);
    
}
    

    
int main(int argc, char **argv)
    
{
    

    
    const char* input_filename=argv[1];
    

    
    //avcodec_register_all();
    
    av_register_all();
    
    //av_ini
    

    
    AVFormatContext* container=avformat_alloc_context();
    
    if(avformat_open_input(&amp;container,input_filename,NULL,NULL)&lt;0){
    
        die("Could not open file");
    
    }
    

    
    if(av_find_stream_info(container)&lt;0){
    
        die("Could not find file info");
    
    }
    
    av_dump_format(container,0,input_filename,false);
    

    
    int stream_id=-1;
    
    int i;
    
    for(i=0;inb_streams;i++){
    
        if(container->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO){
    
            stream_id=i;
    
            break;
    
        }
    
    }
    
    if(stream_id==-1){
    
        die("Could not find Audio Stream");
    
    }
    

    
    AVDictionary *metadata=container->metadata;
    

    
    AVCodecContext *ctx=container->streams[stream_id]->codec;
    
    AVCodec *codec=avcodec_find_decoder(ctx->codec_id);
    

    
    if(codec==NULL){
    
        die("cannot find codec!");
    
    }
    

    
    if(avcodec_open(ctx,codec)&lt;0){
    
        die("Codec cannot be found");
    
    }
    

    
    //ctx=avcodec_alloc_context3(codec);
    

    
    //initialize AO lib
    
    ao_initialize();
    

    
    int driver=ao_default_driver_id();
    

    
    ao_sample_format sformat;
    
    sformat.bits=16;
    
    sformat.channels=2;
    
    sformat.rate=44100;
    
    sformat.byte_format=AO_FMT_NATIVE;
    
    sformat.matrix=0;
    

    
    ao_device *adevice=ao_open_live(driver,&amp;sformat,NULL);
    
    //end of init AO LIB
    

    
    AVPacket packet;
    
    av_init_packet(&amp;packet);
    

    
    AVFrame *frame=avcodec_alloc_frame();
    

    
    int buffer_size=AVCODEC_MAX_AUDIO_FRAME_SIZE;
    
    uint8_t buffer[buffer_size];
    
    packet.data=buffer;
    
    packet.size =buffer_size;
    

    

    

    
    int len;
    
    int frameFinished=0;
    
    while(av_read_frame(container,&amp;packet)>=0)
    
    {
    

    
        if(packet.stream_index==stream_id){
    
            //printf("Audio Frame read  \n");
    
            int len=avcodec_decode_audio4(ctx,frame,&amp;frameFinished,&amp;packet);
    
            //frame->
    
            if(frameFinished){
    
                //printf("Finished reading Frame %d %d\n",packet.size,len);
    
                ao_play(adevice, (char*)frame->data, len);
    
            }
    

    
        }
    

    

    
    }
    

    
    av_close_input_file(container);
    
    ao_shutdown();
    
    return 0;
    
}

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