I recorded a TV show on my pc using mythbuntu software (ubuntu version of mythtv). It cut out all the commercials and then transcoded it to a nice 40 min nuv file that I put onto a usb thumb drive. Now it's portable and vlc can play the file...on a pc. I want to burn it onto a DVD so I can put it in any NTSC DVD player. Also, the file was recorded at 480x480 and I want to change the size to widescreen (16:9). Additionally, the top of the screen recorded a thin horizontal line of junk that needs to be deleted.

Now, I've googled around and found this line in ffmpeg that should work:

ffmpeg -i V-RedSky.nuv -croptop 4 -y -target ntsc-dvd -sameq -aspect 16:9 RedSky.mpg

The new 16:9 video size is great, the annoying horizontal line got cropped, and I got a nice mpg file...but the audio is now out of sync. I tried ffmpeg with fewer options and the audio still got out of sync.

So, I'm thinking I should try different software. Maybe mencoder. How could I put the above ffmpeg options into mencoder?

Well, the best (with both ffmpeg and mencoder) is to read the manual ("man mplayer" and "man ffmpeg"). About the audio, adding more options will probably solve your problem. You NUV file probably have a strange framerate at some point. You should try both 29.97 fps and 30.00 fps in ffmpeg and see if both are out of sync. If the audio is always 2 second late and the gap never grow, then shifting the audio will work. The solution really depend on the problem.

Try the '-async' option with the sample frequency of the audio, usually 48000. So '-async 48000'.

got it to work with mencoder to create a nice mpg file that I can now burn to a DVD using -async 1. Here's the full command:

ffmpeg -i V-RedSky.nuv -croptop 4 -y -target ntsc-dvd -sameq -aspect 16:9 -async 1 RedSky.mpg

Good, but note that 'async 1' only does a simple a/v sync, i.e.

It'll work most of the time, but there may be a/v desync later.