Thanks for the bug report. This particular bug has already been reported into our bug tracking system, but please feel free to report any further bugs you find.

*** This bug has been marked as a duplicate of bug 609601 ***

Thank you. But I would like to emphasize, that this is not a standart AVCHD file, Panasonic uses 50 or 60 fps instead of 24/25/30 fps.

Well at the time being, the issue is mostly being able to properly demux the MPEG-TS "container", I somewhat doubt that framerates would be the problem for being able to import and seek those files.

You will most likely be unable to play those files smoothly/in realtime unless you have GPU hardware acceleration for it (or an insanely powerful CPU) or use proxy editing (bug #609136), but those are completely different issues.

Looks like it's a similar issue to the 'AVCHD lite' format (which in addition to limiting the resolution to 720p also produces progressive content by doubling the display rate).

Does the playback of those files in totem appear stuttered ?

I can't play it with Totem (but can play it with VLC). Here is a 5MB video
http://www.mediafire.com/download.php?hktkkkcjj276m44
This is an m2ts file produced by Panasonic HDWriter, not an mts file copied directly from the camera.

The file should now play fine in totem with this latest commit to gst-ffmpeg:

commit 9db205f9f7335dfa86ce4215dabf866e8156758d
Author: Edward Hervey <bilboed@bilboed.com>
Date:   Sun May 29 17:39:38 2011 +0200

    ffmpegdec: Don't discard timestamps if output AND input are in order
    
    Avoids bogus timestamps for AVCHD-lite streams



Still needs to be accepted in pitivi properly though (sigh)

With the improvements in GStreamer 1.2 and some fixes on the Pitivi side, this is probably fixed by the next release.