With Converter App, you can convert MKV files into many other formats:
MKV to MP4 | MKV to MP3 | MKV to MOV | MKV to AVI | MKV to WEBM | MKV to SRT | MKV to TEXT | MKV to WMV
→ All MKV Converters
If you want to keep working with your final MTS, try:
MTS to MP4 | MTS to MP3 | MTS to MOV | MTS to MKV | MTS to AVI | MTS to WEBM | MTS to WAV | MTS to M4A
→ All MTS Converters