Audio Missing Vegas Pro 9a

cspvideo wrote on 8/21/2009, 5:55 AM
I edited a 25 minute piece in 9a last evening and rendered it to an AVI file. About 22 minutes into the completed render the audio disappears. I re-rendered. Same result. For grins I rendered the audio to an MP3 file. At 128kbs I got exactly the same result. But when I changed the bit rate in the mp3 to 256 it rendered the audio correctly.

Anyone had similar experiences? I've seen threads about XDCAM material and missing audio, but the original material here is an imported (or captured) AVI file from a DVCAM tape.

I also took the materials into 8c and then rendered the project and it rendered correctly.

Comments

R0cky wrote on 8/21/2009, 8:30 AM
Not sure if this is related, but I had a problem only yesterday with 9a not being able to read the audio correctly in an avi. This AVI had the video encoded with huffyYUV and the audio as uncompressed wav.

This file played fine in various players but there was only about 10 seconds of empty event on the audio track in vegas and 3 minutes of video which was fine.
gwailo wrote on 8/21/2009, 4:16 PM
i had the exact same problem in 9.0a

my *mpg had no audio after a certain point, and the *.wav had no audio after the exact same point

But my renders also ended up taking about 10x longer than it should, so it clued me in that vegas was having trouble with a file at that point.


after looking at where the render problem occurred, I had a massive spike in audio level followed by silence.

While previewing, I could hear a pop at that exact same spot and a reading of +54dB on my meter!

To fix it I had to move my audio clip (which had absolutely nothing wrong with it) to another track.

After that it didn't play the pop, and the render worked perfectly.

rs170a wrote on 8/21/2009, 4:49 PM
While previewing, I could hear a pop at that exact same spot and a reading of +54dB on my meter!

Any relation to the problem discussed in this thread?
Loud POP sound on 2 envelope points at 90 degrees

Mike
gwailo wrote on 8/21/2009, 7:50 PM
nope, i didn't have any automation in that spot

moving the audio within the same track to another time - still caused a pop

moving the audio to another track fixed the pop
cspvideo wrote on 8/22/2009, 7:00 AM
Thanks very much.

I don't have any loud pops, but I did add a new audio track and slid the voice track down to it and re-rendered, and sure enough the audio appears.

Is this a new issue to forward along?
gwailo wrote on 8/22/2009, 2:43 PM
one of many...

hopefully ver10 will bring Vegas back to a state where I can love it again