[HELP] Hybrid introducing audio delay that is not present in source material

[4i4oVi40]

So unlike your example, here the delay seems to work. (I checked I'm using the same MP4Box&Co version that I packed with the dev version.)
How do attached files look to you? Are they delayed or do they play (and look) in sync?

Yes, you're absolutely right. Your files indeed play (in VLC) and look (in VirtualDub2) delayed as they should be.

Nevertheless, I ran one more test with 1000 ms delay like that:

MP4Box -add foo.265#video:fps=24:delay=1000:name="" -brand hvc1 -add foo.aac -mpeg4 -new foo1000.mp4

And once again the resulting file comes with NO delay with video and audio perfectly in sync (audio starts on the 2 sec. like in the original file).

I used MP4Box from your package Hybrid, build: GPAC version 1.1.0-DEV-rev1089-gb4d25ac3b-ab-suite

Here I'm attaching my video and audio files (foo.265 and foo.aac) and the resulting file. Also, a screenshot.

Can you please try my files with the MP4Box muxing command above, and let me know what I'm doing wrong. This is really weird...

P.S. I just saw your last 2 posts. I downloaded the new MP4Box and your test files and I'll do the tests that you suggested. And, yes, I totally agree with everything you wrote.