int linesizes[4] = { int(video_format.stride), 0, 0, 0 };
sws_scale(sws_ctx.get(), frame->data, frame->linesize, 0, frame->height, pic_data, linesizes);
video_frame.len = video_format.stride * height;
int linesizes[4] = { int(video_format.stride), 0, 0, 0 };
sws_scale(sws_ctx.get(), frame->data, frame->linesize, 0, frame->height, pic_data, linesizes);
video_frame.len = video_format.stride * height;