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Slideshow / Powerpoint / Online meeting / Lecture Presets

Posted: Sat Jun 27, 2020 10:54 am
by Gunpowder
In these times its necessary to keep the online lectures small as possible, because there are so many of them when you study.
This is my first try and my 2 hours media was compressed to 170MB. I bet there is more to configure, buts thats ok for me. Just copy the code to editor and safe as .json file.

Code: Select all

{
  "PresetList": [
    {
      "AlignAVStart": true,
      "AudioCopyMask": [
        "copy:aac",
        "copy:ac3",
        "copy:dtshd",
        "copy:dts",
        "copy:mp3",
        "copy:truehd",
        "copy:flac",
        "copy:eac3"
      ],
      "AudioEncoderFallback": "ac3",
      "AudioLanguageList": [],
      "AudioList": [
        {
          "AudioBitrate": 160,
          "AudioCompressionLevel": 0.0,
          "AudioEncoder": "av_aac",
          "AudioMixdown": "stereo",
          "AudioNormalizeMixLevel": false,
          "AudioSamplerate": "auto",
          "AudioTrackQualityEnable": false,
          "AudioTrackQuality": -1.0,
          "AudioTrackGainSlider": 0.0,
          "AudioTrackDRCSlider": 0.0
        }
      ],
      "AudioSecondaryEncoderMode": true,
      "AudioTrackSelectionBehavior": "first",
      "ChapterMarkers": true,
      "ChildrenArray": [],
      "Default": false,
      "FileFormat": "mp4",
      "Folder": false,
      "FolderOpen": false,
      "Mp4HttpOptimize": false,
      "Mp4iPodCompatible": false,
      "PictureAutoCrop": true,
      "PictureBottomCrop": 26,
      "PictureLeftCrop": 0,
      "PictureRightCrop": 0,
      "PictureTopCrop": 0,
      "PictureDARWidth": 1280,
      "PictureDeblock": 4,
      "PictureDeinterlaceFilter": "decomb",
      "PictureCombDetectPreset": "default",
      "PictureCombDetectCustom": "",
      "PictureDeinterlacePreset": "default",
      "PictureDeinterlaceCustom": "",
      "PictureDenoiseCustom": "",
      "PictureDenoiseFilter": "off",
      "PictureDenoisePreset": "light",
      "PictureDenoiseTune": "none",
      "PictureSharpenCustom": "",
      "PictureSharpenFilter": "off",
      "PictureSharpenPreset": "medium",
      "PictureSharpenTune": "none",
      "PictureDetelecine": "off",
      "PictureDetelecineCustom": "",
      "PictureItuPAR": false,
      "PictureKeepRatio": true,
      "PictureLooseCrop": false,
      "PictureModulus": 2,
      "PicturePAR": "auto",
      "PicturePARWidth": 1,
      "PicturePARHeight": 1,
      "PictureRotate": "0:0",
      "PictureForceHeight": 0,
      "PictureForceWidth": 0,
      "PresetName": "Good Slide Show",
      "Type": 1,
      "UsesPictureFilters": false,
      "UsesPictureSettings": 2,
      "SubtitleAddCC": false,
      "SubtitleAddForeignAudioSearch": true,
      "SubtitleAddForeignAudioSubtitle": false,
      "SubtitleBurnBehavior": "foreign",
      "SubtitleBurnBDSub": false,
      "SubtitleBurnDVDSub": false,
      "SubtitleLanguageList": [],
      "SubtitleTrackSelectionBehavior": "none",
      "VideoAvgBitrate": 0,
      "VideoColorMatrixCode": 0,
      "VideoEncoder": "x264",
      "VideoFramerate": "30",
      "VideoFramerateMode": "pfr",
      "VideoGrayScale": false,
      "VideoScaler": "swscale",
      "VideoPreset": "fast",
      "VideoTune": "",
      "VideoProfile": "main",
      "VideoLevel": "4.0",
      "VideoOptionExtra": "",
      "VideoQualityType": 2,
      "VideoQualitySlider": 22.0,
      "VideoQSVDecode": false,
      "VideoQSVAsyncDepth": 4,
      "VideoTwoPass": true,
      "VideoTurboTwoPass": true,
      "x264Option": "--ref 1 --deblock 0:0 --partitions i4x4,i8x8,p8x8,b8x8 --me hex --subme 2 --psy-rd 1.00:0.00 --no-mixed-refs --merange 16 --trellis 0 --8x8dct --cqm flat --deadzone-inter 21 --deadzone-intra 11 --chroma-qp-offset 0 --threads 9 --lookahead-threads 3 --bframes 3 --b-pyramid normal --b-adapt 1 --b-bias 0 --direct spatial --weightp 1 --keyint 750 --min-keyint 25 --scenecut 40 --rc-lookahead 10 --crf 23.0 --qcomp 0.60 --qpmin 0 --qpmax 69 --qpstep 4 --vbv-maxrate 750 --vbv-bufsize 1500 --nal-hrd none --ipratio 1.40 --aq-mode 1:direct=auto",
      "x264UseAdvancedOptions": true
    }
  ],
  "VersionMajor": "34",
  "VersionMicro": "0",
  "VersionMinor": "0"
}

Re: Slideshow / Powerpoint / Online meeting / Lecture Presets

Posted: Sat Jun 27, 2020 9:04 pm
by mduell
Why not use the stillimage tune instead of the long pile of crap you have?

Re: Slideshow / Powerpoint / Online meeting / Lecture Presets

Posted: Sun Jun 28, 2020 5:41 pm
by Gunpowder
mduell wrote: Sat Jun 27, 2020 9:04 pm Why not use the stillimage tune instead of the long pile of crap you have?
Well, because its crap and the filesize is 3 times bigger than my results.

Re: Slideshow / Powerpoint / Online meeting / Lecture Presets

Posted: Sun Jun 28, 2020 6:48 pm
by BradleyS
Not exactly specifying the options correctly, either. option1=foo:option2=bar etc.

For a lecture you can probably use mono audio and half the audio bit rate.

Re: Slideshow / Powerpoint / Online meeting / Lecture Presets

Posted: Fri Jul 03, 2020 5:57 pm
by Gunpowder
Could you post the best presets in your opinion, without half the audio bit rate? Would like to try em out and compare.

Re: Slideshow / Powerpoint / Online meeting / Lecture Presets

Posted: Fri Jul 03, 2020 7:57 pm
by musicvid
You can cut your video frame rate in half without much impact, assuming you are filming talking heads.
It's what many cellphones and webcams do.

Re: Slideshow / Powerpoint / Online meeting / Lecture Presets

Posted: Sat Jul 04, 2020 10:29 am
by Gunpowder
I dont like to half the frame rate, when the frames are basicly always the same. The right presets should do the thing, but it seems nobody knows how to do this.

Re: Slideshow / Powerpoint / Online meeting / Lecture Presets

Posted: Sat Jul 04, 2020 4:06 pm
by musicvid
Actually, we do know how to do this. You can:
1. Reduce the Audio and/or Video Bitrate directly
2. Raise the Audio and/or Video compression factor
3. Reduce the Video Resolution or number of Audio channels
4. Reduce the Frame Rate
5. Reduce the color bit depth or chroma subsampling

Good luck!

Re: Slideshow / Powerpoint / Online meeting / Lecture Presets

Posted: Mon Jul 06, 2020 9:33 pm
by mduell
Also
6. Apply an appropriate video encoder tune.

Re: Slideshow / Powerpoint / Online meeting / Lecture Presets

Posted: Tue Jul 07, 2020 3:37 am
by musicvid
Also, (thx for reminder)
7. Add a light denoise filter. Judiciously.