Hello,
during my tests I discovered a serious problem using
mp4save.
With some mobile phones, audio data is far from being
synchronous. The
worst test results we had were from a Motorola KRZR K3. A
one minute
recording had audio already finished after 40 seconds, the
video playing
all the 60 seconds. The bug is clearly on the receiving
part, as the
files created had these defects.
The tests were done counting every some seconds alound in
front of the
camera. Especially speaking pauses were shortened
drastically! After
replacing the speak (which includes pauses between the
numbers) by a
simple constant sinus tone the defects were gone.
Mobile phones don't send audio data if there is only noise
to transmit.
How is it handled? Maybe this is the place to look for the
bug.
Ideas, anybody?
Tested phones:
---------------
SonyEricsson P1 - no shortenings
Nokia 6233 / 6234 - nearly no shortenings
Nokia 6680 - small shortenings (1-2 sec. missing out of
60)
SonyEricsson K800i - substantial shortenings (~6 sec.
missing out of 60)
Motorola KRZR K3 - huge shortenings (~20 sec. missing out of
60)
Kind regards,
Florian
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