Converting virtualdub avi capture to mp4

[rchpepper]

So I am capturing some VHS videos with virtualdub. I have it set to encode while capturing to x264 and mp3, but there seems to be some issue with the audio, the time shows correctly as 6 1/2 hrs but when I open in vlc the time says 13 hrs. Video is normal, stops at 6 1/2 but audio is stretched 2x the video length. From what I have found googling, its because avi doesn't like x264 and mp3, which is ok since I would like them in mp4 format anyways.

Here is my plan: capture in x264 and uncompressed audio (this works well with tests I have done) and convert to mp4 after. I would just use passthu on the video and convert the audio to aac since this is better quality at lower bitrates than mp3, which would save space. What program can I use that will do this well? I would like it to have a basic gui, nothing fancy that uses lots of resources when just idling, support for many encoding/decoding formats for future use with other video files, and of course free.

[pippas]

Save the uncompressed audio file using 'save WAV' from within Virtualdub.

Convert to AAC using THIS free converter.

'Demux' the video section of the file using MP4 Box GUI

Use the same program to 'mux' the video file with the new AAC audio.

I find that makes an mp4 which is more compatible than other options I've tried , when used with my TV and PVR USB slots and, and with my WD Live hardware player.

All using free programs of course!

[Baldrick]

I would use some ffmpeg frontend like tencoder. Under video codec choose direct copy, under audio codec choose aac and last container mp4.

Or with avidemux, under video choose copy, under audio choose aac, under format choose mp4, save as mp4.

[smrpix]

Use ffmpeg as a CLI or with a front end like WinFF.

Cut and paste this as a WinFF preset: -vcodec copy -acodec libvo_aacenc -b:a 320k -ac 2 -ar 48000
(Adjust audio bitrate to taste.)