Apple HD Gallery quality playback

[George Strother]

The data rates are just roughly matched. Minor changes in data rate seem to have no effect on the skipping. The Nasa 540p30 clip shows 1974.67 kbps in Movie Info from QT Player, my 540p30 clip shows 1896.1 kbps.

I see the skipping from an internal hard drive or from a server. Most of the 15 computers I have tested have played from internal hard drive and all skipped in almost eaxctly the same pattern on a given test file, except the MBPs.

Are you using your MacBook Pro? As I mentioned, the MBP skipped the least of any computer I tested. They still skipped some, but much less. According to Matrox, the best computer LCD monitor to use with their MXO Mac DVI output converter is the Apple 20″ or 23″, the only computer monitors with a 59.94 refresh rate, so they are the only computer monitors that will play skip free after you plug into their $1,000 box to make the external display skip free. Apparently the issue is the refresh rate clock inside of the monitor. If Apple put this technology in the MBP screen, that might explain it’s better playback. I have also heard thay lose this advantage if viewed on an external DVI monitor.

Of course, the smoother screen display on an MBP doesn’t make compressions from an MBP playback any smoother on other computers. Tried that. No soap.

What format is the source video you generally compress from? Do you compress from any progressive formats? I didn’t notice objectionable skipping until I stared shooting progressive video.

George
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