Try remuxing them first - a lot less time/processor consuming than transcoding and often fixes time code issues (particularly on AVI's). Either use WinHelper (see signature) to remux to the same container, or do it manually using ffmpeg:
ffmpeg -i sourcefile.avi -c copy -map 0 destfile.avi
(make sure the extension type remains the same - .avi in the above example, but modify for your needs). If this doesn't work, send through ffmpeg details as per jhb50's post.
DenyAllPanasonic Viera CS610A | Panasonic Viera V20A | Sony PS4 | Sony PS3 | Panasonic DMP-BD79 | Yamaha RX-V500D | iPad | Windows 7 | Serviio 1.8 Pro
WinHelper | MediaInfoBeta Tester, Moderator
Please do not PM me for support as any solution cannot be shared with others.