[mythtv-users] How to convert PCM audio track to AC3?
myth at dgreaves.com
Sat Apr 2 08:42:16 UTC 2005
>Thanks David. Can you give me a bit more detail on using avidemux(2) to
>convert to AC3? I did not see that option in my version.
>PS - The reason I want to use AC3 is because the dvd player in the truck
>will not play a pcm stream. I tried my ford and a buddies crapsler and
>neither will play the sound track. Video is fine, just no sound. Plays fine
>in my home players.
Use avidemux 2.036 (I think the later ones are still a touch buggy)
Open the nuv file.
It should say 'this looks like mpeg do you want to index it'
say yes (!)
It then pops up a dialog asking about the audio - always hit 'scan file
for audio stream'
It'll tell you what you've got in there (I get mpeg audio with a shift
of 79ms. Remember the shift)
It then pops up another box to say 'we have a shift of 79ms between
audio and video'
You can now edit out adverts.
I assume you know how to do this? ask if not
You won't be touching the video stream so ignore the options on the LHS
* select FFm AC3
* hit configure and select the audio bitrate you want
* hit A Filter and tick the timeshift box and enter the time shift you
saw earlier - but negative. I use -79
* hit A Process (it sticks in)
[avidemux will pass the audio and video streams through, untouched apart
from cutlists, unless you turn on 'A Process' or 'V process']
Under Output Format select Mpeg A+V
Now hit save and save the file as film.vob.
It's now ready to be dvdauthored...
More information about the mythtv-users