json - Encoding.com 转码速度

Question

ffmpeg预设是:
ultrafast , superfast , veryfast , faster , fast , medium , slow , slower , veryslow和 placebo
如果我想要编码速度 slow，我的 json 请求应该如何？ ?

到目前为止我的json:

{
    "query": {
        "userid": "79943",
        "userkey": "XXX",
        "action": "addMedia",
        "notify": "aw3somevideo@gmail.com",
        "format": [{
            "output": "mpeg_dash",
            "sizes": "426x240,640x360",
            "bitrates": "400k,800k"
        }, {
            "output": "ipad_stream",
            "sizes": "426x240,640x360",
            "bitrates": "400k,800k"
        }]
    }
}

Answer 1

经过一些研究和@rogerdpack 和encoding.com 的帮助支持我找到了答案

可以在视频编解码参数中设置:

Slow:
--me umh --subme 8 --ref 5 --b-adapt 2 --direct auto

JSON 结构将如下所示:

"video_codec_parameters": {
"coder": "1",
"flags": "+loop",
"flags2": "+bpyramid+wpred+mixed_refs+dct8x8-fastpskip",
"cmp": "+chroma",
"partitions": "+parti8x8+parti4x4+partp8x8+partb8x8",
"me_method": "umh",
"subq": "7",
"me_range": "16",
"bf": "16",
"keyint_min": "25",
"sc_threshold": "40",
"i_qfactor": "0.71",
"b_strategy": "1",
"qcomp": "0.6",
"qmin": "10",
"qmax": "51",
"qdiff": "4",
"directpred": "1",
"level": "30",
"refs": "4",
"psy": "0"
},