[Libav-user] YUV to H.264 encoding using baseline profile.

[zsz8060]

Hi Experts,

I want to encode YUV to H264 baseline profile. The encoding is done of good
quality but I found two major issues ffmepg uses High profile instead of
baseline profile and video is jerky. Here are the parameters I used. I would
like to know why it always selects high profile and with which setting I can
select baseline profile.

	pCodecCtxEncoder->bit_rate = 512000;
	pCodecCtxEncoder->width = 704;
	pCodecCtxEncoder->height = 576;

	pCodecCtxEncoder->time_base.num = 1;
	pCodecCtxEncoder->time_base.den = 25;
	pCodecCtxEncoder->gop_size = 40; 
	pCodecCtxEncoder->max_b_frames = 2;
	pCodecCtxEncoder->pix_fmt = PIX_FMT_YUV420P;
	
	pCodecCtxEncoder->bit_rate_tolerance = (int) (128000.f * 0.20f);
	pCodecCtxEncoder->rc_max_rate = 10;
	pCodecCtxEncoder->b_frame_strategy = 0;
	pCodecCtxEncoder->coder_type = 0;
	pCodecCtxEncoder->me_cmp = 256;
	pCodecCtxEncoder->me_range = 16;
	pCodecCtxEncoder->qmin = 10;
	pCodecCtxEncoder->qmax = 51;
	pCodecCtxEncoder->scenechange_threshold = 40;
	pCodecCtxEncoder->flags |= CODEC_FLAG_LOOP_FILTER;
	pCodecCtxEncoder->me_method = ME_HEX;
	pCodecCtxEncoder->me_subpel_quality = 7;


	pCodecCtxEncoder->i_quant_factor = 0.71;
	pCodecCtxEncoder->qcompress = 0.6;
	pCodecCtxEncoder->max_qdiff = 4;
	pCodecCtxEncoder->directpred = 1; 
	pCodecCtxEncoder->keyint_min = 25;
	pCodecCtxEncoder->partitions |= X264_PART_I4X4 + X264_PART_P8X8 +
X264_PART_P4X4 + X264_PART_P8X8 + X264_PART_B8X8; 
	pCodecCtxEncoder->refs = 5;    
	pCodecCtxEncoder->trellis = 1; 
	pCodecCtxEncoder->flags2|= CODEC_FLAG2_MIXED_REFS;  
	pCodecCtxEncoder->weighted_p_pred = 2; 
	pCodecCtxEncoder->pix_fmt = PIX_FMT_YUV420P;
	pCodecCtxEncoder->profile = FF_PROFILE_H264_BASELINE;


Thank you in advance,

PS

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