我正在尝试为 1080i 捕获配置 x264。下面的大多数设置都可以在不同的示例中找到。但是，一起编译它们不起作用。ffmpeg API 不报告错误，但avcodec_encode_video()总是返回零。
有些数字对我来说很奇怪......例如，gop_size。250是不是太高了？
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pCodecContext->codec_type = AVMEDIA_TYPE_VIDEO;
pCodecContext->codec_id = CODEC_ID_H264;
pCodecContext->coder_type = FF_CODER_TYPE_AC;
pCodecContext->flags |= CODEC_FLAG_LOOP_FILTER | CODEC_FLAG_INTERLACED_ME | CODEC_FLAG_INTERLACED_DCT;
pCodecContext->me_cmp |= 1;
pCodecContext->partitions |= X264_PART_I8X8 | X264_PART_I4X4 | X264_PART_P8X8 | X264_PART_B8X8;
pCodecContext->me_method = ME_UMH;
pCodecContext->me_subpel_quality = 8;
pCodecContext->me_range = 16;
pCodecContext->bit_rate = 10 * 1024 * 1024; // 10 Mbps??
pCodecContext->width = 1920;
pCodecContext->height = 1080;
pCodecContext->time_base.num = 1; // 25 fps
pCodecContext->time_base.den = 25; // 25 fps
pCodecContext->gop_size = 250; // 250
pCodecContext->keyint_min = 25;
pCodecContext->scenechange_threshold = 40;
pCodecContext->i_quant_factor = 0.71f;
pCodecContext->b_frame_strategy = 1;
pCodecContext->qcompress = 0.6f;
pCodecContext->qmin = 10;
pCodecContext->qmax = 51;
pCodecContext->max_qdiff = 4;
pCodecContext->max_b_frames = 3;
pCodecContext->refs = 4;
pCodecContext->directpred = 3;
pCodecContext->trellis = 1;
pCodecContext->flags2 |= CODEC_FLAG2_WPRED | CODEC_FLAG2_MIXED_REFS | CODEC_FLAG2_8X8DCT | CODEC_FLAG2_FASTPSKIP; // wpred+mixed_refs+dct8x8+fastpskip
pCodecContext->weighted_p_pred = 2; // not implemented with interlaced ??
pCodecContext->crf = 22;
pCodecContext->pix_fmt = PIX_FMT_YUV420P;
pCodecContext->thread_count = 0;