Incorrect Filename Suffix During AV1 Conversion

[fabquenneville]

Version: mediacurator 1.0.1
Command:

mediacurator.py convert --files "/mnt/media/sample.1275w.717p.mpeg4.mkv" --out av1 --printop formated

Description: During the conversion of videos to the AV1 codec, the application incorrectly adds [HEVC] to the output filename instead of the expected [AV1]. This leads to confusion regarding the actual codec used for the output file.

Steps to Reproduce:

1. Run the command as specified above.
2. Check the output filename and note that it ends with [HEVC] instead of [AV1].