Hi everybody,

a few days ago I got my first digicam, a Canon DC-21.

Now I have problems with editing the videos on my mac. No matter with what application I open the .vro or .vbo files (iMovie, VLC, Quicktime, MPEG streamclip,...) the videos have terrible motion artefacts: in motion all frames are seriously horizontally striped.

Strangely the same files are allright if I view them on Windows OS with a DVD application.

Does anyone have experience with viewing/editing clips from the DC-21 on mac?

Thank you in advance,
Mischa

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Looks like normal interlace comb, not the macro-blocking that could be expected from severe motion artifacts.

"Real" motion artifacts tend to be related to having too much data in a scene change for the bit-rate of MPEG compression. MPEG2 writes one complete frame out of (typically) 15; the other fourteen are variations of "deltas" composed of instructions that say "Move a block from previous frame at (x1, y1) to (x2, y2); fill in the hole with this new data". If you move fast enough that there is practically no reuse of previous frame available, the compression may simplify to large blocks for the fill-in of new scene data.

Interlace combing is expected difference from having a two fields make up a frame; movement between the fields results in the alternating shifts.

Windows software might be doing some form of deinterlacing that you might have to manually activate.