When executing with -format cbr flag, it should create a .cbr file, rar compressed. Instead the utility creates a zip compressed file with a .cbr extension.
$ file one-piece-891.cbr
one-piece-891.cbr: Zip archive data, at least v2.0 to extract
$ unzip -q -t one-piece-891.cbr
No errors detected in compressed data of one-piece-891.cbr.
$ rar t one-piece-891.cbr
RAR 5.30 beta 2 Copyright (c) 1993-2015 Alexander Roshal 4 Aug 2015
Trial version Type RAR -? for help
one-piece-891.cbr is not RAR archive```
Thanks for reporting. In the morning I'll try to address this issue.
As I remember .CBZ and .CBR files are just .ZIP and .RAR files with their extensions modified, so it is correct to use .zip.
When executing with
-format cbr
flag, it should create a .cbr file, rar compressed. Instead the utility creates a zip compressed file with a .cbr extension.