[Libav-user] avcodec_encode_video2 C++problem

[Dmitry Adjiev]

How can I get link to this iscussion for snding to others?


2014-08-01 5:11 GMT+04:00 Dmitry Adjiev <adjiev.dmitry at gmail.com>:

> I solved the issue. I don't know why. but in C++ buffer size outbuf_size =
> 100000; was too small, so increase of buffer size solves the problem.
> Thanks for everyone who read it
>
>
> 2014-08-01 5:08 GMT+04:00 Dmitry Adjiev <adjiev.dmitry at gmail.com>:
>
>  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
>>
>
>
>
> --
> Regards,
> Dmitry
>



-- 
Regards,
Dmitry
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