stripping audio

[lou41888]

how do i strip audio to replace with new audio?

[filmboss80]

This answer will be as detailed as the information you've given in your question:

Demux. Replace. Remux.

Until we know source and format of audio and video, there's not much else to say.

[lou41888]

it is avi file

[filmboss80]

DV avi? (That would be a .wav audio stream.) Divx or Xvid Avi? (That would be either mp3 or ac3 audio.) There are different ways of dealing with different encoding types. "Avi" still doesn't say much, as it is only a container to the video and audio streams. Open the avi file in GSpot (freeware in the Tools section) to see what type of video (dv, xvid, divx, or uncompressed RGB) and audio (wav, mp3, or ac3) are found inside the avi container.

[lou41888]

what next is there a article i can to read to get a ideal from

[AlanHK]

it is avi file

Use AviMUX GUI -- that's all it does.

More complex editing, try AviDemux (no relation), or VirtualDub

[lou41888]

how do i add the new audio?

[AlanHK]

how do i add the new audio?

Same tools. They're all free. Install them and read the help and various guides.