(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?

(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.

Slowing down the video framerate in mkvtoolnix doesn't require re-encoding the video, it just changes the metadata within the .mkv file.

(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.

OK. I found out how to get a spectrogram.

What are we looking for?

You will want to slow the video to 23.976fps (sometimes written as 24000/1001)

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.

Ah that's right, eac3to causes sync drift on multi-m2ts playlists, but TSmuxer doesn't.

Sorry, I meant what on the spectrogram would I be looking for to judge whether it's a downmix?

Re. Yarp's comments.

You have pm wongfeihung.