REQUEST: duplicate audio tracks (and a question about audio bitrate modes)

[radorn]

I would like to add the same track encoded in different formats (AAC-LC and Opus) to my encode, but Avidemux won't allow it complaining about them being "used multiple times" and forcing me to remove the duplicates.
It's helpful as a warning in case you did it inadvertently, but to impose it with no option to override, is not so great. Is there a reason for this? Can it be changed?

As for bitrates, particularly in FDK AAC-LC and Opus, there's only an option for specifying a bitrate, but what mode are those? VBR? CBR? C-VBR? something else?
Personally I would like the freest style of VBR, letting the encoder adjust as necessary for the highest quality possible. It doesn't make sense for me to force a more constant rate on them since my files are meant for local playback and are not constrained by streaming requirements. Just as I use two-pass for video, and the result is necessarily pure VBR, I also want the closest to that for audio.

Thanks for your attention.

[eumagga0x2a]

AAC is always VBR.

Regarding re-use of existing audio tracks (ability to create more than a single access per track), it is on my todo list.

[radorn]

AAC is always VBR.

Opus too?

[eumagga0x2a]

No, it can do both CBR and VBR, but the plugin in Avidemux which talks to the Opus library asks only for CBR.

[radorn]

OK, thanks for the clarification.
I'll look forward to the duplicate audio fix... and, perhaps, Opus VBR? (and AV1 maybe??? xD)

Thanks for maintaining Avidemux.