Isadora-> Syphon-> Micca player: inaccurate size translation

[JJHP3]

Hi All

Running into a problem with a new video installation which requires accurate mapping. Using Isadora into a video projector, I carefully map the output. That video is output through the Syphon actor (set to same resolution and ProRez codec). Then I import into FCP so I can repeat the video clip until it's an hour or so long and export as H264. That goes on my Micca G2 (set for HD output) allowing the video can play constantly during the exhibit. The problem is that video size is not the same. A bit smaller and generally a little wanky in aspect ratio. Not a lot, but many adjustments necessary with projector position. Is the path to the finished video at fault, or is it the Micca?  I've used this system before several times but without the need for inch accuracy. Thanks for any insight, John

[Michel]

@jjhp3
Dear John, it’s quite possible that the Micca player is the source of the issue. A good way to test this is to play the H.264 file exported from Final Cut directly on your computer using VLC. If it looks correct there, then the Micca G2 is very likely the culprit.

If it doesn’t look right in VLC, try playing the original ProRes version (before it went through Final Cut). If that one looks correct, then the problem is introduced during the H.264 encoding step.