Boys (1996) - Video and audio out of sync

[J4ZzY]

For this https://www.blu-ray.com/movies/Boys-Blu-ray/25966/ disk, the audio and video is out of sync using 3.52. The problem seems to be that this disk has 2 m2ts files in its main playlist, the first one being ~10 seconds of the kino lorber logo with no audio or subs, as in, there is only a video stream in that m2ts file, no audio or sub streams. 3.52 does not apply the appropriate ~10sec delay to the audio streams, it does do it for the subtitle stream. 3.34 also doesn't apply the audio delays, but it also doesn't apply a delay to the sub stream. The result of this is that 3.52 has the audio out of sync with the video but the subs correct to the video, and 3.34 has the audio and sub streams in sync but out of sync with the video. DGDemux only demuxes/sees the chapter and video stream when doing a regular demux, but using the -sf switch (the description of this switch in the docs also describes this exact problem we're having with this disc) you get everything in sync, albeit of course without the opening logo. For some reason the -sf method also fails to see that the commentary track needs a 32ms delay (at least according to eac3to, and after listening very carefully it seems to be correct compared to the main audio), so that's slightly out of sync with the main audio.

[renols]

Hi.

This is an "issue" with many Kino Lorber discs. They have that 11 second lead in with just video and nothing else.

Just skip the first m2ts and forget about the logo.

renols

[J4ZzY]

So for now I "fixed" this by demuxing the full disk with 3.52 and only the subs with 3.34 and then checking the sub timing difference between the sup files extracted with 3.52 and 3.34. That gives you the delay 3.52 applies to the sup file, applying that delay to the already extracted audio tracks from 3.52 perfectly syncs the audio to the video and subs. So the expected/correct behavior seems to be for eac3to to apply the same delay to audio streams as it does to subtitle streams, for this specific disk type.

[Curly]

sorry for the delay guys you wudnt believe my excuse anyway (ask Britney)

i have some Kino Lorber disks on hand
will try to duplicate and address

[Peter]

The main issue is that the first m2ts file (the KL studio animation) has no audio or subtitle track (it's just video). So, I've found that the best solution, for me, is to demux the stream file (m2ts) for the main movie, not the playlist (mpls). The video, audio, & subtitles are then in sync. You can then demux the chapters from the playlist, which then need to be offset by length of the first m2ts file (you need to subtract the duration of the first m2ts file from the chapter times, which I just do after muxing, via MKVToolNix).