[Libav-user] avcodec_encode_video2 C++problem

[Dmitry Adjiev]

I found it here:
https://ffmpeg.org/pipermail/libav-user/2014-August/author.html
Sorry for flooding


2014-08-01 6:13 GMT+04:00 Dmitry Adjiev <adjiev.dmitry at gmail.com>:

> 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
>



-- 
Regards,
Dmitry
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