converting AVI/MJPG/PCM to MP4/AVC/AAC

[mulargui]

Hi,
I'm trying to consolidate my video library in a smaller number of modern formats.

I have a set of old video files from photo cameras. Most of them are AVI/MJPG/PCM. The frame rate is low, 15 frames, and the audio typically is mono 8 bit PCM.

Ideally I would like to convert them to MP4/AVC/AAC or MP4/XVID/MP3.

I'm having two issues in the conversion:
1. no way to convert the audio. I receive the message -> [Buildchain] encoder initialization failed. not activated, make sure number of channels and bitrate are compatible with encoder!
2. I can convert the video (separately) but the outcome has very bad quality, is fundamentally garbage.

Any help will be highly appreciated.

[styrol]

1. no way to convert the audio. I receive the message -> [Buildchain] encoder initialization failed. not activated, make sure number of channels and bitrate are compatible with encoder!

Try 16 bit stereo at 44.1kHz and 96kbps (or less kbps) using AAC.

[mulargui]

it works! thank you very much.
Btw, does anyone have experience converting MJPG to AVC or xvid? Most of my mjpg videos are low res (320x240) and low frame rate (15)?