Tony P:...the format was MP4 from Panasonic G9... A/V sync errors due this particular bug would not be expected as your source file does not have AC-3 audio. If you are able to use an existing MTS file having AC-3 audio (and easily-visible audio/video cues), or create one, and do an MP4 export from that MTS file, it would be interesting to see ...

Tony P:...They were the same 1080 50P clip two times...What format was the source file? The A/V sync bug appears only to occur when the source is a transport stream (MTS) file having AC-3 (Dolby) audio Regards,Richard

jjn:Just for clarity, you are only seeing this with MTS files? Yes, furthermore the A/V sync error occurs with MTS files having AC-3 audio only; I created an MTS file having PCM audio and used that as the source for the export, the audio remained in sync. Combinations tested:MTS file having AC-3 (Dolby 2-channel) audio - export as MTS or MP4 ...

I've now done some tests here using PS23.1.1.242 Ultimate... A/V sync problem occurs with both NTSC and PAL - but here is far worse with NTSC; in a 5 minute test project the error was 0.56 seconds for PAL and 0.92 seconds for NTSC (in both cases the audio ''gets ahead'' of the video. And I can now see that the reason why I did not observe the ...

FWIW - I've just completed a series of long MP4 exports where all of the source clips were from s PAL AVCHD camcorder, which records as MTS files (HD 1920x1080 / 50i) with AC-3 (Dolby 2-channel) audio. And no A/V sync issues observed in preview or in the exported files. But I only work with ''PAL'' video (25 or 50 frames/sec), never at other ...

With ''progressive'' settings Studio will de-interlace the video for export (in my experience seems to do a perfectly adequate job of it); movement might not appear to be quite as smooth as you've gone from updating the picture 50 times per second (albeit half-resolution fields) to only 25 times per second (updating the entire frame). But, ...

Wasn't there an issue with transitions a while back? (can't remember whether it was in PS22 or PS23...)PAL (25fps) projectTransition was created in ''Maintain Timeline Sync'' mode, and was an odd number of frames (e.g. 1 second)If Bob's title that blacks out is touching or overlapping such a transition, maybe he's found a new trigger for that old ...

Bob keen:...so I guess I should put PS23 on the other computer... That would certainly prove whether it's Studio that has changed, and not something weird about either of the two computers. Having Studio 23 on that older computer might also prove handy if you ever wanted to use it to export a project while you worked on the next one on the newer ...

Tony P:Have you tried exporting your project as an ISO and then burning to DVD? My suggestion would be to create a disc image as a VIDEO_TS folder (makes it easy to use media players such as VLC to check that the DVD image plays, the menu navigation works as intended, etc.). Then use third-party software such as ImgBurn to burn to disc (you'll ...

The difference may have nothing to do with the computers themselves - but could be due to differences between PS22 and PS23 (for example if PS23 has changed the MPEG-2 codec it uses (as happened with AC-3 audio)). Although I do have a computer having both PS22 and PS23 on it, I don't have an HDV camera so can't do any comparison here... IMO ...