小天管理的内容 - 页 449

[分享发现] 终于在 Handbrake 上复刻出了压制领域真神小丸工具箱的效果

在流媒体视频分发这一块，很长一段时间里小丸工具箱都是唯一真神，因为它有一套极其深度优化的特调压制参数，可以把视频压制到一个惊人的低码率的同时，还能保留非常高的质量。不做参数优化的情况下 Handbrake 对于这段视频只有 76 分搜了 Handbrake 的很多教程，基本都是教界面怎么用，CRF 调多少，编码器选什么，最多就是把 Profile 调成 Slow ，Preset 调成 High 这种基础动作。多数时候，一样的 CRF 获得的视频码率基本是一致的，但最终图像质量却有着天差地别，尤其是当我拍摄一段夕阳或者天空的场景时，能够很明显地看到 Handbrake 色彩断层比小丸更加严重。所以琢磨了好一阵子，我终于把小丸的进阶 x264 参数复刻到了 Handbrake 上，使他们拥有一致的 vmaf 评分的同时，在 1080P 下还能获得 50%的编码速度提升：这下终于能够在享受现代化的队列管理、灵活的音轨视频轨字幕轨映射的同时，还能获得和小丸一样的压制质量了。参数保存为 json ，预设→从文件导入 { "PresetList": [ { "AlignAVStart": true, "AudioCopyMask": [], "AudioEncoderFallback": "av_aac", "AudioLanguageList": [ "any" ], "AudioList": [ { "AudioBitrate": 256, "AudioCompressionLevel": 0, "AudioEncoder": "av_aac", "AudioMixdown": "stereo", "AudioNormalizeMixLevel": false, "AudioSamplerate": "auto", "AudioTrackQualityEnable": false, "AudioTrackQuality": -1, "AudioTrackGainSlider": 0, "AudioTrackDRCSlider": 0 } ], "AudioSecondaryEncoderMode": true, "AudioTrackSelectionBehavior": "all", "ChapterMarkers": true, "ChildrenArray": [], "Default": true, "FileFormat": "av_mp4", "Folder": false, "FolderOpen": false, "Optimize": true, "Mp4iPodCompatible": false, "PictureCropMode": 0, "PictureBottomCrop": 0, "PictureLeftCrop": 0, "PictureRightCrop": 0, "PictureTopCrop": 0, "PictureDARWidth": 1920, "PictureDeblockPreset": "off", "PictureDeblockTune": "medium", "PictureDeblockCustom": "strength=strong:thresh=20:blocksize=8", "PictureDeinterlaceFilter": "decomb", "PictureCombDetectPreset": "default", "PictureCombDetectCustom": "", "PictureDeinterlacePreset": "default", "PictureDeinterlaceCustom": "", "PictureDenoiseCustom": "", "PictureDenoiseFilter": "off", "PictureSharpenCustom": "", "PictureSharpenFilter": "off", "PictureSharpenPreset": "medium", "PictureSharpenTune": "none", "PictureDetelecine": "off", "PictureDetelecineCustom": "", "PictureColorspacePreset": "off", "PictureColorspaceCustom": "", "PictureChromaSmoothPreset": "off", "PictureChromaSmoothTune": "none", "PictureChromaSmoothCustom": "", "PictureItuPAR": false, "PictureKeepRatio": true, "PicturePAR": "auto", "PicturePARWidth": 1, "PicturePARHeight": 1, "PictureWidth": 3840, "PictureHeight": 2160, "PictureUseMaximumSize": true, "PictureAllowUpscaling": false, "PictureForceHeight": 0, "PictureForceWidth": 0, "PicturePadMode": "none", "PicturePadTop": 0, "PicturePadBottom": 0, "PicturePadLeft": 0, "PicturePadRight": 0, "PresetName": "1080P x264 xiaowan", "Type": 1, "SubtitleAddCC": false, "SubtitleAddForeignAudioSearch": false, "SubtitleAddForeignAudioSubtitle": false, "SubtitleBurnBehavior": "none", "SubtitleBurnBDSub": false, "SubtitleBurnDVDSub": false, "SubtitleLanguageList": [ "any" ], "SubtitleTrackSelectionBehavior": "none", "VideoAvgBitrate": 0, "VideoColorMatrixCode": 0, "VideoEncoder": "x264", "VideoFramerateMode": "vfr", "VideoGrayScale": false, "VideoScaler": "swscale", "VideoPreset": "slow", "VideoTune": "", "VideoProfile": "high", "VideoLevel": "auto", "VideoOptionExtra": "ref=4:bframes=3:me=umh:keyint=600:min-keyint=1:deblock=1,1:scenecut=60:qcomp=0.5:psy-rd=0.3,0:aq-mode=2:aq-strength=0.8", "VideoQualityType": 2, "VideoQualitySlider": 24, "VideoMultiPass": true, "VideoTurboMultiPass": true, "x264UseAdvancedOptions": false, "PresetDisabled": false, "MetadataPassthrough": true } ], "VersionMajor": 56, "VersionMicro": 0, "VersionMinor": 0 }

2024年7月26日

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