[Libav-user] avcodec_encode_video2 C++problem

[Dmitry Adjiev]

 if (open_url(argv[1], &stream) == 0) {

        AVFrame* pic = av_frame_alloc();
        int i, size, x, y, outbuf_size;
        uint8_t *outbuf, *picture_buf;

        // alloc image and output buffer
        outbuf_size = 100000;
        outbuf = malloc(outbuf_size);
        size = VIDEO_WIDTH * VIDEO_HEIGHT;
        picture_buf = malloc((size * 3) / 2); // size for YUV 420

        pic->data[0] = picture_buf;
        pic->data[1] = pic->data[0] + size;
        pic->data[2] = pic->data[1] + size / 4;
        pic->linesize[0] = VIDEO_WIDTH;
        pic->linesize[1] = VIDEO_WIDTH / 2;
        pic->linesize[2] = VIDEO_WIDTH / 2;
        AVPacket packet;
        av_init_packet(&packet);
        i = 0;

        int ret = avformat_write_header(stream.output_format_context, NULL);

        if (ret < 0) {
            av_log(NULL, AV_LOG_ERROR, "Error occurred when opening output
file\n");
            return ret;
        }

        while (!stopped) {
            // encode 1 second of video
            for(i = 0; i < 25; i++) {
                // prepare a dummy image
                //
                for(y = 0; y < VIDEO_HEIGHT; y++) {

                    for(x = 0; x < VIDEO_WIDTH; x++) {
                        pic->data[0][y * pic->linesize[0] + x] = x + y + i
* 3;
                    }
                }

                // Cb and Cr
                for(y=0;y<VIDEO_HEIGHT/2;y++) {
                    for(x=0;x<VIDEO_WIDTH/2;x++) {
                        pic->data[1][y * pic->linesize[1] + x] = 128 + y +
i * 2;
                        pic->data[2][y * pic->linesize[2] + x] = 64 + x + i
* 5;
                    }
                }

                int got_packet_ptr;
                avcodec_encode_video2(stream.stream->codec, &packet, pic,
&got_packet_ptr);
                int stream_index = 0;
                // prepare packet for muxing
                packet.stream_index = stream_index;
                packet.dts = av_rescale_q_rnd(packet.dts,

stream.output_format_context->streams[stream_index]->codec->time_base,

stream.output_format_context->streams[stream_index]->time_base,
                        AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
                packet.pts = av_rescale_q_rnd(packet.pts,

stream.output_format_context->streams[stream_index]->codec->time_base,

stream.output_format_context->streams[stream_index]->time_base,
                        AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
                packet.duration = av_rescale_q(packet.duration,

stream.output_format_context->streams[stream_index]->codec->time_base,

stream.output_format_context->streams[stream_index]->time_base);

                if (got_packet_ptr) {

av_interleaved_write_frame(stream.output_format_context, &packet);
                } else
                    break;

                usleep(2);
            }
        }


2014-08-01 5:01 GMT+04:00 Dmitry Adjiev <adjiev.dmitry at gmail.com>:

> Hello.
> I have a problem with avcodec_encode_video2.
> I send h263 video stream to network, this code works when I compile it
> with C, but when I try to use C++ classes it crashes.
> Can anyone help me?
> --
> Regards,
> Dmitry
>



-- 
Regards,
Dmitry
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