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Topic: QuickTime A/V sync with M-Audio Transit (Read 4032 times) previous topic - next topic
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QuickTime A/V sync with M-Audio Transit

Hi,

I use an M-Audio Transit USB. When watching video with PowerDVD, Media Player or VLC, audio and video are perfectly in sync. But with QuickTime, the audio always comes too early.

My Settings:
Quicktime Preferences - Delay of the Audio Device: 1ms (situation gets worse when I increase the value, and 1ms is the minimum)
M-Audio Transit: 24-bit, 8000Hz to 48000Hz, Latency: Very Low

Does someone have an idea how to fix this?

Yours,
LTR

QuickTime A/V sync with M-Audio Transit

Reply #1 –
there are other ways to play quicktime offline, like mpui, media player classic (with proper filters), vlc.

(i know that wasn't what you wanted to hear.)
PANIC: CPU 1: Cache Error (unrecoverable - dcache data) Eframe = 0x90000000208cf3b8
NOTICE - cpu 0 didn't dump TLB, may be hung

QuickTime A/V sync with M-Audio Transit

Reply #2 –
Nevertheless, thanks for your reply. In VLC, the lag is gone, but the image and audio quality is lower than in QuickTime.

QuickTime A/V sync with M-Audio Transit

Reply #3 –
for audio quality you have to refer to rule #8 of this forum;
http://www.hydrogenaudio.org/forums/index.php?showtopic=3974

for video quality, maybe you could post some screenshots?
PANIC: CPU 1: Cache Error (unrecoverable - dcache data) Eframe = 0x90000000208cf3b8
NOTICE - cpu 0 didn't dump TLB, may be hung

QuickTime A/V sync with M-Audio Transit

Reply #4 –
The Transit USB can't record what it's currently playing, so I can't put the output of QuickTime into a WAV file and I'm therefore unable to do an ABX test.

Regarding video quality, here you are:

QuickTime and VLC, same zoom level.

QuickTime A/V sync with M-Audio Transit

Reply #5 –
interesting, what video codec is it? (if AVC then check that all post processing is turned off)
PANIC: CPU 1: Cache Error (unrecoverable - dcache data) Eframe = 0x90000000208cf3b8
NOTICE - cpu 0 didn't dump TLB, may be hung

QuickTime A/V sync with M-Audio Transit

Reply #6 –
Quicktime reports H.264 for video, and the audio codec is AAC.
VLC reports avc1 for video, and mp4a for audio (which is just another term for AAC, i guess).

Postprocessing in VLC is deactivated, but the video output module was set to DirectX 3D. I changed it to DirectX, and now QuickTime and VLC look the same.

edit:
And in VLC, the output sample rate was set to 48000, while the video has 44100Hz sound. I fixed this, and now I can't tell a difference between VLC and QuickTime.

Alright, I'll use VLC in the future. Thanx!