Sunday, July 01, 2007

Visual Hub, High Motion and H.264

Just a tip - on Visual Hub for the Mac, when encoding an MP4 file with lots of motion - my example was a series of photos at 15 frames per photo (2 per second) - it fails miserably even at high quality settings.  The fast frame changes just disintegrated into macroblock noise.

However, if I go into Advanced Settings, and check '2-pass' encoding, it clears right up, at the cost of 50% more encoding time.  (2 minutes to 3 minutes for a 2:10 video clip on the 2.33 MacBook Pro)

Another note - at the same settings, without the 2-pass encoding, the AVI Simple profile appears to deliver similarly excellent results.  Not sure what codec is used - Xvid / DivX I assume via FFMPEG.  Also a smaller file size and greater compatibility between Windows, Mac and Linux.

The AVI files can be seen at my KS HSTA site (no, not the UTube, below that!).

W.

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