Mark Kundinger wrote:
--- Mark Kundinger <[EMAIL PROTECTED]> wrote:
--- "Joseph A. Caputo" <[EMAIL PROTECTED]> wrote:
On Thursday 20 October 2005 1:40, Mark Kundinger wrote:
If I time stretch a recording, the audio seems to get "gurgly" (minor,
sporadic, pitch or tempo changes). This is most notable with programs that like to do
big dramatic musical scores with lots of violins (think West Wing). The strange part is
that even if I set the time stretch back to 1.0, the gurgling is still there. However,
if I exit back to the menu and re-view the recording, sound is fine.
Most of my recording is done on a PVR-250, so the recordings are MPEG-2. I
have a MJPEG recorder too, and it doesn't *seem* that the problem still exists
there, although I'm not positive, because I don't have as many recordings for
that. For sound output, I'm using the Nforce2 sound on my motherboard with
Nvidia's driver.
So, anyone else seen this? Right now I have no idea where the problem lies.
What decoding method are you using to play back your MPEG-2 recordings
(normal/ffmpeg, libmpeg2 or XvMC) ?
Ooh, that's a very good question. I have no special options selected, so I'm
using normal/ffmpeg. And I am using a SVN from a week or two ago. I can try
out libmpeg2 on my next tv watching bout.
I got a chance to try out this week's recording of West Wing (still by
far the best test case), and the "gurgle" still happened, whether I
used libmpeg2 or ffmpeg. So I'm thinking the problem is either
MythTV's playback, or something involving the capture.
Can vanilla mplayer or xine do time stretch? If so, I could try the
recording with those players to see if the gurgle still happens...
xine has a time stretch plugin called "stretch" but note that it appears
in the audio post-processing "Chain Reaction" not in the video one.
Mike
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