I'm guessing we need to know the framerate of your footage, your sequence, and your file target...and if the audio seems to be the correct speed or not...and if it is staying synced.
Thanks for your reply. My source footage consists of MTS files from an AVCHD camcorder. The files are 1080i anamorphic, so 1440x1080, with an aspect ration of 1.333 and a framerate of 29.97fps. I used one of the AVCHD sequence templates in Premiere CS5 that matched the video files.
I'm exorting using the H.264 Bluray preset for 1080i. I tried several of the profiles (1080p, etc), but they all end with the same bad result. The video plays, but seems to be playing at half speed. My 15-minute clip takes 30 minutes to play, even though the timline in VLC or WMP reports at 15 minutes. The audio sounds fine, but stops after 15 minutes (as it should). It's obviously out of sync, since the video is playing at half speed.
I have read a few other articles indicating it might be an issue with the way Premiere is interpreting the interlaced footage from the MTS files? This is beyond my area of knowledge.
When I encode using the MPEG-2 Bluray profile, it works fine. The video playback speed is normal.
My end goal is to edit my MTS files from the camcorder, encode using the H.264 profile, and place in an MKV container for playback on my XBMC-based HTPC. I'm also considering exporting as a high-bitrate MPEG-2, then using another encoder (HandBrake, etc.) to create the x264 MKV. Any other recommendations would be greatly appreciated. Thank you.
so the h.264 export matched your source frame rate of 29.97?
The exported H.264 file, when I import it back into Premiere, appears to be at 29,97fps and plays fi
ne on the Premiere timeline. However, opening it with VLC, WMP, XBMC causes it to play in slow motion (half speed).
I just tried using MKVmerge to create an MKV file. I forced the framerate to 60fps and now VLC/WMP play it correctly. I will try XBMC this evening when I'm back at home. Any ideas?
I'm having the exact same problem, any help on this issue would be greatly appreciated.