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VLC, WMP 및 WMPClassic으로 테스트 한 빈 화면 만 보여주는 출력 비디오로 몇 주 동안 프로그램을 디버깅했습니다. 나는 FFPlay와 lo를 사용해 보았고 비디오가 완벽하게 작동하는 것을 보았다. 이 잘못된 픽셀 형식으로 인해 일반적으로 및 PIX_FMT_YUV420P 전환하는 보편적으로 작동하게됩니다 읽었습니다 ...하지만 이미 인코딩 프로세스에서 해당 픽셀 형식을 사용하고 있습니다. 이것을 일으키는 다른 것이 있습니까?FFMpeg로 인코딩 된 비디오는 FFPlay에서만 재생됩니다.
AVCodec* codec;
AVCodecContext* c = NULL;
uint8_t* outbuf;
int i, out_size, outbuf_size;
avcodec_register_all();
printf("Video encoding\n");
// Find the mpeg1 video encoder
codec = avcodec_find_encoder(CODEC_ID_H264);
if (!codec) {
fprintf(stderr, "Codec not found\n");
exit(1);
}
else printf("H264 codec found\n");
c = avcodec_alloc_context3(codec);
c->bit_rate = 400000;
c->width = 1920; // resolution must be a multiple of two (1280x720),(1900x1080),(720x480)
c->height = 1200;
c->time_base.num = 1; // framerate numerator
c->time_base.den = 25; // framerate denominator
c->gop_size = 10; // emit one intra frame every ten frames
c->max_b_frames = 1; // maximum number of b-frames between non b-frames
//c->keyint_min = 1; // minimum GOP size
//c->i_quant_factor = (float)0.71; // qscale factor between P and I frames
//c->b_frame_strategy = 20;
//c->qcompress = (float)0.6;
//c->qmin = 20; // minimum quantizer
//c->qmax = 51; // maximum quantizer
//c->max_qdiff = 4; // maximum quantizer difference between frames
//c->refs = 4; // number of reference frames
//c->trellis = 1; // trellis RD Quantization
c->pix_fmt = PIX_FMT_YUV420P;
c->codec_id = CODEC_ID_H264;
//c->codec_type = AVMEDIA_TYPE_VIDEO;
// Open the encoder
if (avcodec_open2(c, codec,NULL) < 0) {
fprintf(stderr, "Could not open codec\n");
exit(1);
}
else printf("H264 codec opened\n");
outbuf_size = 100000 + c->width*c->height*(32>>3);//*(32>>3); // alloc image and output buffer
outbuf = static_cast<uint8_t *>(malloc(outbuf_size));
printf("Setting buffer size to: %d\n",outbuf_size);
FILE* f = fopen("example.mpg","wb");
if(!f) printf("x - Cannot open video file for writing\n");
else printf("Opened video file for writing\n");
// encode 5 seconds of video
for(i=0;i<STREAM_FRAME_RATE*STREAM_DURATION;i++) {
fflush(stdout);
screenCap();
int nbytes = avpicture_get_size(PIX_FMT_YUV420P, c->width, c->height);
uint8_t* outbuffer = (uint8_t*)av_malloc(nbytes*sizeof(uint8_t));
AVFrame* inpic = avcodec_alloc_frame();
AVFrame* outpic = avcodec_alloc_frame();
outpic->pts = (int64_t)((float)i * (1000.0/((float)(c->time_base.den))) * 90);
avpicture_fill((AVPicture*)inpic, (uint8_t*)pPixels, PIX_FMT_RGB32, c->width, c->height); // Fill picture with image
avpicture_fill((AVPicture*)outpic, outbuffer, PIX_FMT_YUV420P, c->width, c->height);
av_image_alloc(outpic->data, outpic->linesize, c->width, c->height, c->pix_fmt, 1);
inpic->data[0] += inpic->linesize[0]*(screenHeight-1); // Flipping frame
inpic->linesize[0] = -inpic->linesize[0]; // Flipping frame
struct SwsContext* fooContext = sws_getContext(screenWidth, screenHeight, PIX_FMT_RGB32, c->width, c->height, PIX_FMT_YUV420P, SWS_FAST_BILINEAR, NULL, NULL, NULL);
sws_scale(fooContext, inpic->data, inpic->linesize, 0, c->height, outpic->data, outpic->linesize);
// encode the image
out_size = avcodec_encode_video(c, outbuf, outbuf_size, outpic);
printf("Encoding frame %3d (size=%5d)\n", i, out_size);
fwrite(outbuf, 1, out_size, f);
delete [] pPixels;
av_free(outbuffer);
av_free(inpic);
av_free(outpic);
}
// get the delayed frames
for(; out_size; i++) {
fflush(stdout);
out_size = avcodec_encode_video(c, outbuf, outbuf_size, NULL);
printf("Writing frame %3d (size=%5d)\n", i, out_size);
fwrite(outbuf, 1, out_size, f);
}
// add sequence end code to have a real mpeg file
outbuf[0] = 0x00;
outbuf[1] = 0x00;
outbuf[2] = 0x01;
outbuf[3] = 0xb7;
fwrite(outbuf, 1, 4, f);
fclose(f);
avcodec_close(c);
free(outbuf);
av_free(c);
printf("Closed codec and Freed\n");