On 15/11/12 23:53, Herman Robak wrote:
På Thu, 15 Nov 2012 05:07:42 +0100, skrev Basil Chupin
<[email protected]>:
On 15/11/12 02:59, Herman Robak wrote:
[pruned]
You sound like someone who knows something so can you explain this,
please :-) .
Uh-oh...
:-)
You are being too modest. You know heaps more than anyone here I suspect.
[pruned]
When exactly does the audio start - is it when the audio level meter
appears on the right-hand side of the Compositor window or when the
actual *sound* is heard (to match the appearance of the synthesiser)?
When the sound is heard, obviously.
Which is what I thought and which is what I used to set the Audio Default.
With the audio problem I was having I thought it best just to make sure
that what I did was correct.
Before going on, sorry for not replying earlier but I was doing some
editing on Cinelerra just to confirm what I will write now....
I solved the problem with the audio sync. What had happened was that
some files on my system were updated and Cinelerra was also updated at
the same time. This, added to the fact that I am new to Cinelerra and
therefore still finding my feet, resulted in some setting or something,
somewhere, being changed. What I have been doing over the past couple of
days was to go back to "basics" and reset all the preferences and did
some editing to see if the sync is now holding. Everything is fine now.
However, what I also found is that occasionally the audio would go out
of sync after some point even though it was fine for most of the file
prior to that point. Pinpointing the reason took a bit of time. What was
causing the problem was that a few frames were somehow corrupted[*] and
as a result threw the audio and video out of sync subsequent to these
corrupted frames. Once I found the cause, I used the Video Effect "Delay
Video" [by 0.7 seconds in my case] from that point to the end of the
file - and the video/audio were in sync again.
A most valuable learning experience was had over the past few days :-) .
[*] When playing back the file at normal speed these frames were not
even noticeable - but the video/audio mismatch was certainly noticeable.
[pruned]
BC
--
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AMD FX 8-core 3.6/4.2GHz processor
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Gigabyte AMD3+ m/board; Gigabyte nVidia GTX550Ti 1GB DDR5 GPU
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