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Vidvox / hap-qt-codec

A QuickTime codec for Hap video
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Videos encoded with HAP Q suffer low frame rate #12

Closed kamend closed 11 years ago

kamend commented 11 years ago

I tried exporting a video with Hap Q from Cinema 4d and the playback is skipping frames, if I use the Hap version, everything seems to play nice. I am on 10.7. Any idea what might be the reason for this? The Hap Q video included in the QT example plays OK.

bangnoise commented 11 years ago

The data-rate of the Hap Q export is probably too high for the drive you are playing from. If you open the movie in QuickTime Player and do Window > Show Movie Inspector you can see the data-rate, and compare that with your drive's read-rate (Blackmagic have a free app on the Mac App Store called DiskSpeedTest which will measure that).

Assuming that is the problem I'm closing this as it's not a bug - if you think that isn't the case then let us know.

kamend commented 11 years ago

I am on a Samsung SSD, so I doubt thats the problem, I am playing the same video in Photo Jpeg just fine, only when I convert it to Hap Q it starts to play slow. The resolution is really high btw, 3240x1920, may be thats the problem? I could upload the videos somewhere if you like

bangnoise commented 11 years ago

The data-rate is almost certainly the problem at those dimensions. Have you tried and found regular Hap doesn't give you usable quality?

kamend commented 11 years ago

Ok, I guess the data-rate is really the problem. Just rendered a Full HD video in Hap Q and it plays nice. Anyway, I actually just wanted to test where my limits are. Full HD will suit my fine for now. Thanks for the help! And thanks for the great Codec!

bangnoise commented 11 years ago

Yep Q has a very high data-rate, particularly for noisy images. If it provides sufficient quality I'd recommend regular Hap - image quality rather depends on what you're encoding.

On 19 April 2013 15:47, Kamen Dimitrov notifications@github.com wrote:

Ok, I guess the data-rate is really the problem. Just rendered a Full HD video in Hap Q and it plays nice. Anyway, I actually just wanted to test where my limits are. Full HD will suit my fine for now. Thanks for the help!

— Reply to this email directly or view it on GitHubhttps://github.com/Vidvox/hap-qt-codec/issues/12#issuecomment-16656951 .