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Midnight Run (1988) BD Stereo
#11
(2023-06-03, 10:40 AM)X5gb Wrote: NTSC dvd 2.0 is better than DE blu-ray.

Really? I assumed because the BD was lossless it would be good.

Sorry to have wasted anyone's time.

Is there a rip of this DVD 2.0 synced to the UHD, may I ask?
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#12
(2023-06-03, 12:22 PM)Yarp Wrote:
(2023-06-03, 10:35 AM)wongfeihung Wrote: I put the two ripped files into Audacity and you can see that whilst the German BD looks normal:

waveforms don't give you much info. you need to be looking at and comparing spectrograms.

I don't know how to do that.

I just thought comparing the two, the UHD looked strangely compressed(?).

The waveforms for a number of other suspected or confirmed downmixes have a similar appearence.
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#13
Slowing down the video framerate in mkvtoolnix doesn't require re-encoding the video, it just changes the metadata within the .mkv file.
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#14
(2023-06-03, 01:36 PM)zoidberg Wrote: Slowing down the video framerate in mkvtoolnix doesn't require re-encoding the video, it just changes the metadata within the .mkv file.

So which would you slow down the video rate or the audio?

I feel like whichever I choose will be the wrong choice. Tongue
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#15
OK. I found out how to get a spectrogram.

What are we looking for?

[Image: MIDNIGHT-UHD-2-0-SPEC.jpg]
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#16
You will want to slow the video to 23.976fps (sometimes written as 24000/1001)
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#17
Changing framerate in MKVToolNix sometimes introduces errors. I prefer to use TsMuxer for that. Maybe eac3to works just as well for that, but I've never used it for video fps changes.
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#18
Ah that's right, eac3to causes sync drift on multi-m2ts playlists, but TSmuxer doesn't.
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#19
Sorry, I meant what on the spectrogram would I be looking for to judge whether it's a downmix?

Re. Yarp's comments.
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#20
You have pm wongfeihung.
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