Convert amv to ffv1

Download and install the latest version of Filestar.
Right click on one or more Amv file(s) on your desktop and select Convert with Filestar.
Type convert to ffv1 in the search box.
Press Convert.

What is the difference between .amv and .ffv1?

Name: Actions Media Video; FFV1 (Lossless Video)
Extension: .amv; .ffv1
Format: Binary; Binary
Category: Video; Video
Developer: MPEG4IP
Description: An AMV file is a video saved in the Actions Media Video file format, which is used by some Chinese portable media players. It contains a compressed, low-resolution (96x96 to 320x240 pixel) video.
MIME Type: video/x-amv; video/x-matroska
Wikipedia: .amv on Wikipedia; .ffv1 on Wikipedia