2551 Views 4 Replies Latest reply: Apr 4, 2006 7:36 AM by doclittle
QuickTime 7 nows supports higher frequencies from audio sources.
Third party software can "alter" these settings.
The Audio MIDI Setup (Utilities folder) can "adjust" the playback settings and "restore" your video files "playability".
Open the app, change the output format to 44100Hz, and try the file again.
You may need to do this each time a non standard formats is used.
This "fix" also affects FireWire devices and other Apple software (FCP, AE) and other "audio" issues some content providers may be experiencing.
Open the app, change the output format to 44100Hz,
and try the file again.
You may need to do this each time a non standard
formats is used.
Thanks for the info. This was a work around "fix" I noticed in another thread. It seems to have unhappy side effects in other aps--which means it is not a good fix. However, I did try it when I first noticed it in the other thread. It did not work for me when I tried it then, and it does not work for me now. My output format is and has been set at 44100 Hz. My MP4 files still do not play correctly.
Concerning the terminology of "non-standard format," as far as I know my files are standard format--straight from a relatively new camera. However, I readily admit I do not know what a "non-standard format" might be. But even if my files might be "non-standard" (whatever that means), it baffles me that this problem did not occur with QT 6.x but does with QT 7.x. The sensible thing to assume with a QT upgrade (required for Tiger, no less--this is not an optional upgrade) is that QT 7.x should be backwards compatible with "non-standard" files that played flawlessly on QT 6.x.
Anyway, thanks for the hint. I am still looking for a solution.
I play MP4 movies on QT on an iBook G4 with no problem. However, I have found that files become fragmented if they are transferred to a hard drive more than one at a time. I have no idea whether this has anything to do with YOUR problem.
If I copy a problem mp4 file from the internal drive to an external drive -- one at a time -- the new copy plays without jerks. If I grab two mp4s and copy them to my external drive (even if they were both non-jerky to begin with) they will both become jerky.
I have a number of mp4 files on an external drive. They were put there one at a time and they play with no problem at all.
I was finally able to solve this QT stuttering problem by deleting all QT preference files from my user account (~/Library/Preferences/com.apple.*).
Got the hint to do so from this discussion: "Any Fix For Video Stuttering?" at http://discussions.apple.com/thread.jspa?threadID=373530&start=0&tstart=0