Any safe way to convert WMV to MP4 on PC that keeps the original quality?

MEncoder is a powerful command-line video encoding and conversion tool, part of the MPlayer project. It supports a wide range of video formats (including WMV, AVI, MP4, MKV) and offers fine-grained control over encoding parameters. While not as widely used as free WMV to MP4 conversion tool, MEncoder remains a solid choice for batch processing, advanced filtering, and compatibility with older codecs.

Here is a single command to let you convert wmv to mp4 on PC or Mac:

mencoder input.wmv -ovc x264 -x264encopts crf=23 -oac mp3lame -lameopts preset=standard -of lavf -lavfopts format=mp4 -o output.mp4  

-ovc x264:                        Use H.264 video codec
-x264encopts crf=23:      Sets quality (lower = better, 18-28 recommended)
-oac mp3lame:                 Audio codec (MP3)
-of lavf:                             Forces libavformat output
-lavfopts format=mp4:     Outputs in MP4 container

✅ Pros

1. Works well with older codecs (Xvid, MPEG-2).
2. Supports MPlayer filters (denoise, deinterlace, etc.).
3. Lightweight compared to other wmv to mp3 converters in some cases.

❌ Cons

1. Less actively maintained.
2. More complex syntax for advanced features.
3. No native AAC audio (requires external tools like faaac).