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Warning and question about QT7 H.264 HD and Windows QT7 Beta Player
Hi all. Just the heads up.
I have a client that wished to use H.264 to encode her HDTV 1080i shows on gardening to be shown on a PC driving a plasma TV at the entrance to her office. I had downloaded the BBC 1080i demo from apple and used it as the bases for the encode. The file came from DVCPROHD an was converted in Compressor 2.0 from FCP5. It compressed to 7000kb/s and looked good on my G5 dual 2.7. I loaded the two hours of video onto a FW hd and then onto the PC. Downloaded the beta QT7 drivers, and was disappointed at the playback. the video is at 30fps but ran at around 3-4fps on the PC. I thought that the pc might be too slow but it was a P4 xeon dual 3GHZ, 1GB ram, with scsi 160 HDs and a ATI 9800. After reconfiguring for hours, I could not get the video to play back over 7FPS on the PC. I downloaded the BBC test to the PC and it dod not run well either. I finally gave up and transfered the original QT DVCPROHD files to the PC which did run well, after installing a new 72GB HD to hold it. Apple lists nothing about HD H.264 and the PC, sating that a 1.8Ghz P4, 256MB, 64MB Video is needed for SD (640×480) video.
My question is; is H.264 HD just too much for the PC or has Apple not properly configured the software yet? Has anyone tried H.264 HD on a good PC and had any luck? Most if not all of my clients are asking about QT 7 and H.264 PC compatibility.
Here is the 1080P h.264 file if you wish to test it out yourself 100MB. QT7 needed.
https://images.apple.com/movies/us/hd_gallery/gl1800/bbc_1080p.zipThanks,
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4 Replies
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I’m running a dual 1 ghz G4 and I can play DV movies in high quality just fine, and their bandwidth is 4 times that of the H264 demo clip.
I can only get 7-9fps playback on the demo clip. Odd. Maybe it’s a QT pro thing? I don’t have 7 pro yet.
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It has nothing to do with bandwidth. HD footage at H264 is very CPU intensive.
I downloaded the 720p clip for the trailer of Batman on my girlfriend’s Dell notebook that has a 2ghz Celeron, 512kb ram, and uses a generic Intel graphics chip. It played back fine. Your dual-Xeon is much more powerful than what’s needed for HD playback. There’s some sort of software incompatiblity going on in your case. Make sure you have the latest ATI drivers.
If you want to save space, encode it as Windows Media 9 HD. You can use Flip4Mac to create that on OSX.
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Isn’t 720p still SD. The clip he’s dealing with is HD.
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1920x1080i and 1280x720p are both considered HD.
Inquiring minds…
BryceDon’t worry Mr. B. I have a cunning plan…
PowerBook 1.67 Ghz ATI 9700 128 MB 2 GB
Final Cut Pro HD
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