pybind播放视频

解码挺快的，0-16ms，

但是不知道为什么，还没传数据，特别慢，400-800ms一张图片，

#-*- coding:utf-8 -*-
import pysdk as demo
import time
filepath="0217.h264"

start=time.time()
def m_callback(status,width,height):
    global start
    print('callback ok', status,width,height,time.time()-start)
    start=time.time()
    # print('callback ok',a)


filename=b'rtsp://192.168.1.1:554/h264/ch1/main/av_stream'

demo.play_url(filename, m_callback)
# vp= binddemo.add(128, 72, aaa)
print(vp)

int play_url(char* url, py::function callback_f)
{

	av_log_set_level(AV_LOG_WARNING);
	unsigned version = avcodec_version();

	printf("FFmpeg version: %d\n", version);

	AVFormatContext *avFormatCtx = NULL;
	int            i, videoindex;
	AVCodecContext  *avCodecCtx = NULL;
	AVCodec        *avCodec;
	avformat_network_init();
	//avFormatCtx = avformat_alloc_context();
	//if (avformat_open_input(&pFormatCtx, patha.c_str(), NULL, NULL) != 0) {
	if (avformat_open_input(&avFormatCtx, url, NULL, NULL) != 0) {
		printf("Couldn't open input stream.\n");
		return -1;
	}
	avCodec = NULL;
	while (avCodec == NULL) {
		printf("start find stream info \n");
		if (avformat_find_stream_info(avFormatCtx, NULL) < 0) {
			printf("Couldn't find stream info\n");
			goto restart_stream;
			continue;
		}
		videoindex = -1;
		for (i = 0; i < avFormatCtx->nb_streams; i++)
			if (avFormatCtx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
				if (videoindex == -1) {
					videoindex = i;
				}
				//break;
			}
		if (videoindex == -1) {
			printf("Didn't find a video stream.\n");
			goto restart_stream;
		}
		avCodecCtx = avcodec_alloc_context3(NULL);
		avcodec_parameters_to_context(avCodecCtx, avFormatCtx->streams[videoindex]->codecpar);
		avCodec = avcodec_find_decoder(avCodecCtx->codec_id);
		if (avCodec == NULL) {
			printf("Codec not found \n");
			goto restart_stream;
			//return -1;
		}
		if (avcodec_open2(avCodecCtx, avCodec, NULL) < 0) {
			printf("Could not open codec.\n");
			goto restart_stream;
			continue;
			//return -1;
		}
		goto ok;
	restart_stream:
		printf("restart 1  ");
		avformat_free_context(avFormatCtx);
		printf("restart 2  ");
		//avformat_close_input(&pFormatCtx);
		avFormatCtx = NULL;
		avFormatCtx = avformat_alloc_context();
		printf("restart 3  ");
		//printf("restart 4");
		printf("restart 4  ");

		int open_ret = avformat_open_input(&avFormatCtx, url, NULL, NULL);
		if (open_ret != 0) {
			printf("2Couldn't open input stream %d\n", open_ret);
			return -1;
		}
		avFormatCtx->probesize = 1000 * 1024;
		avFormatCtx->max_analyze_duration = 10 * AV_TIME_BASE;
		printf("restart 5\n");
		avCodec = NULL;
		continue;
	ok:
		break;
	}

	AVFrame *pFrameYUV;
	AVFrame *pFrameRGB;
	pFrameYUV = av_frame_alloc();
	pFrameRGB = av_frame_alloc();


	uint8_t *out_buffer;

	struct SwsContext *img_convert_ctx;
	img_convert_ctx = sws_getContext(avCodecCtx->width, avCodecCtx->height, avCodecCtx->pix_fmt, avCodecCtx->width, avCodecCtx->height, AV_PIX_FMT_RGB24, SWS_BICUBIC, NULL, NULL, NULL);

	out_buffer = new uint8_t[avpicture_get_size(AV_PIX_FMT_RGB24, avCodecCtx->width, avCodecCtx->height)];
	//avpicture_fill((AVPicture *)pFrameRGB, out_buffer, AV_PIX_FMT_RGB24, avCodecCtx->width, avCodecCtx->height);
	av_image_fill_arrays(pFrameRGB->data, pFrameRGB->linesize, out_buffer, AV_PIX_FMT_RGB24, avCodecCtx->width, avCodecCtx->height, 1);

	int ret, got_picture;

	AVPacket packet;// = (AVPacket *)av_malloc(sizeof(AVPacket));

	int need_decode = 1;
	int is_key_frame = 0;

	while (av_read_frame(avFormatCtx, &packet) >= 0) {
		if (packet.stream_index == videoindex) {
			DWORD start_time = GetTickCount();
			if (avcodec_send_packet(avCodecCtx, &packet) != 0) {
				printf("avcodec_send_packet错误\n");
				break;
			}
			while (avcodec_receive_frame(avCodecCtx, pFrameYUV) == 0) {

				int ret = avcodec_send_frame(avCodecCtx, pFrameYUV);
				pFrameYUV->pts++;
				printf("decode ok %d %u\n", avCodecCtx->flags, GetTickCount() - start_time);
				/*fwrite(pFrameYUV->data[0], (pCodecCtx->width)*(pCodecCtx->height) * 3, 1, output);*/
				sws_scale(img_convert_ctx, pFrameYUV->data, pFrameYUV->linesize, 0, avCodecCtx->height, pFrameRGB->data, pFrameRGB->linesize);

				//callback_f((char*)pFrameRGB->data[0], 1,  avCodecCtx->width, avCodecCtx->height);
				callback_f(1, avCodecCtx->width, avCodecCtx->height);
				avcodec_flush_buffers(avCodecCtx);
				//av_frame_free(&pFrameYUV);

			}
		}
		av_packet_unref(&packet);
	}


	avcodec_close(avCodecCtx);
	avformat_close_input(&avFormatCtx);
	return 0;
}