[FFmpeg-user] Why width and height of the CodecContext gives me always zero.

[Keestu Pillo]

Not sure what was my mistake in the below code. I m trying with ffmpeg 0.11
and SDL2.0 in android.

QUESTION: *Why Width and Height of the CodecContext gives me always zero
?..*


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

    int flags;
    flags = SDL_INIT_VIDEO | SDL_INIT_TIMER;

    if (SDL_Init (flags)) {
        LOGD ("Could not intialize Video for SDL: %s \n", SDL_GetError());
    }
    else
        LOGD (" SUCCESS: SDL_Init ");

    // ffmpeg Register all services..
    ffmpeg_register_all ();


    pFrame = avcodec_alloc_frame ();
    context = avformat_alloc_context();

    err = avformat_open_input (&context, "rtsp:ip:port", NULL, NULL);
    if ( err < 0) {
        __android_log_print(ANDROID_LOG_DEBUG, "ffmpegguard", "Unable
to open rtsp... ");

        return -1;
    }

    for (i = 0; i < context->nb_streams; i++)
    {
        // Find the Decoder.
        codec = avcodec_find_decoder(context->streams[i]->codec->codec_id);
        if (codec->type  == AVMEDIA_TYPE_VIDEO ) {
            __android_log_print(ANDROID_LOG_DEBUG, "ffmpegguard",
"Found Video Streaming..  ");
            videoStreamIndex = i;

        }
    }

    // Play RTSP
    av_read_play(context);

    // Get Codec Context.
    pCodecCtx = context->streams[videoStreamIndex]->codec;
    if ( pCodecCtx == NULL )
        __android_log_print(ANDROID_LOG_DEBUG, "ffmpegguard",
"CodecCtx is NULL>>> ");
    else
        __android_log_print(ANDROID_LOG_DEBUG, "ffmpegguard",
"CodecCtx is <<<OK>>> ");


    //Find the Decoder.
    pCodec = avcodec_find_decoder (pCodecCtx->codec_id);
    avcodec_open2 (pCodecCtx, pCodec, NULL);


    int w = pCodecCtx->width;  // Why me getting 0 ?
    int h = pCodecCtx->height;

    window = SDL_CreateWindow ("Test ffmpeg",SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED, w, h,
SDL_WINDOW_SHOWN|SDL_WINDOW_ALLOW_HIGHDPI);
    // What this HIGHDPI Means ??

    if ( window != NULL )
    {
        LOGD (" WINDOW CREATED.. , create Renderer ..");
        renderer = SDL_CreateRenderer (window, -1, 0);
    }
    else
    {
        LOGD (" Invalid SDL Window ");
    }
__android_log_print(ANDROID_LOG_DEBUG, "ffmpegguard", "Width and
Height of PCodeccCtx.. %d .. %d " , w, h);
    return 0;}