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Slow playback for large quicktime videos on older iBook
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Mac Enthusiast
Join Date: Mar 2002
Location: Toronto, Canada
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Offline
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I used to think that playing back quicktime videos should be no problem for any iBook until I ran into the doom 3 E3 Trailer. I drop frames like crazy on my 600Mhz to the point where its like a slide show with audio. I had pretty much everything turned off I think the halflife e3 was giving me trouble too. I'd like to see if the new iBooks can take it so if anyone with 700Mhz and up would like to download the trailer from trailer
Also in the front page if fileplanet.com and report back.
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Mac Enthusiast
Join Date: Nov 2001
Location: California
Status:
Offline
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It could be the compression used; newer and more compex algorithm. (Or maybe someone just did a bad job in that department.) On much older Macs, the Video compressor produced movies with acceptable playback, but when the Sorenson compressor was used, playback began to suffer. More complex decompression to get higher quality video with less data.
When you get info on the movie, what is the compressor and data rate for the video and audio?
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12" Powerbook 1.5GHz/SuperDrive, 1.25GB Ram, 80GB HD, Airport Extreme, Mac OS X 10.4.11 Tiger
iBook (Late 2001)600MHz/Combo, 640MB RAM, 20GB HD, Airport, Mac OS X 10.3.9 Panther — web server
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Mac Enthusiast
Join Date: Mar 2002
Location: Toronto, Canada
Status:
Offline
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Originally posted by ccsccs7:
It could be the compression used; newer and more compex algorithm. (Or maybe someone just did a bad job in that department.) On much older Macs, the Video compressor produced movies with acceptable playback, but when the Sorenson compressor was used, playback began to suffer. More complex decompression to get higher quality video with less data.
When you get info on the movie, what is the compressor and data rate for the video and audio?
In quicktime movie properties it says
Video Track:
Data Rate: 934.5 K bytes/sec
Data Format: Sorenson Video 3
Sound Track:
Sample Rage: 44100Hz
Compression: IMA 4:1
Data Rate: 45.7K bytes/sec
Movie:
Data Rate: 980.2 K byte/sec
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Mac Enthusiast
Join Date: Nov 2001
Location: California
Status:
Offline
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Not wanting to get a membership with that site, or wanting to download the huge file, I tried making a movie of my own and saving it in a similar fashion. I too get dropped frames (about half to 2/3 dropped). With more movement in a frame, it probably would have been even worse.
Well, that's with my 600MHz iBook (with the 8MB ATI RAGE graphics).
Just to note: I had no problems playing the original DV movie from which I made the sample movie.
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12" Powerbook 1.5GHz/SuperDrive, 1.25GB Ram, 80GB HD, Airport Extreme, Mac OS X 10.4.11 Tiger
iBook (Late 2001)600MHz/Combo, 640MB RAM, 20GB HD, Airport, Mac OS X 10.3.9 Panther — web server
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