DVD out of sync

[stephen22]

I have a music DVD-R recorded on Panasonic recorder and the audio is 300ms out of sync (delayed). I want to correct as losslessly as possible.

Can I somehow do this directly with avidemux (which I have only just discovered!) or will I need to rip it to mkv first?

[Richard1485]

Others will have to advise about AviDemux, but most types of audio stream can be delayed without re-encoding (no quality loss). There's no reason why an MKV needs to be in the picture. Presumably, as your disc is a DVD-R, there's no copy protection. I would:

copy the disc to a drive;
demux the video and audio with PGCDemux;
delay the audio track with delaycut (or eac3to);
mux the delayed audio and the video back to a DVD structure with Muxman;
burn.

Delaycut can handle pretty much any audio stream that's likely to find its way onto a DVD-R. Remuxing with Muxman assumes that you want the video to remain a DVD; if not, remux to another container.

[stephen22]

Thanks that's helpful.

[Ghitulescu]

"Where" exactly do you "have" it?

I had used Panasonic DVD recorders since its first model (in Europe), which I still have, to mid-series, and never encountered that the recorder would "delay" the audio.
And 300ms seems to be too precise to be the result of the TV "watch'n'compare". I would infer that you somehow ripped the disc and the software gave you this value.

My bet is on the "ripper" that screwed the things.
I do not use DVDRs, they were too expensive (back then) and focused on -RAM and -RW (I also have the first Pioneer DVD recorder in Europe - I would have had also the first European DVD recorder, the Philips 1000 but it was much less reliable than the easterners). Such discs can only be ripped via a special software that address the VRO format. After the disc was correctly ripped, the movies can be processed as usual with any VOB/DVD-compatible software (DVD shrink, PGC edit etc.).

[stephen22]

It was a broadcast by Sky Arts, and I think the fault was with the broadcaster. (And actually it turned out to be 500ms.)

And I hadn't realised that makemkv is lossless anyway, so I've corrected it in avidemux and watch it from HDD on my TV.

DVD recorders still have their uses, e.g. casual recording from commercial channels so you don't have to sit through the adverts. And making discs for travel, hospital stays etc.

[Ghitulescu]

I got the idea :)
One can solve the issue simply by remuxing with a new delay.
I asked once whether such a software exists to correct on the fly the delay in audio, as it is possible for subtitles, and I was told that is none. I still think there is none.