Error while splitting into chapters

[nixfuerdiecharts]

I tried to convert an aax audiobook with following command:
./AAXtoMP3 -e:m4a --chaptered --authcode xxxx000x --target_dir ~/Musik/ ~/Downloads/audiobookname.aax

I also tried exchanging the -e:m4a flag with --aac before the --chaptered flag. The audiobook always gets converted in a single file. But everytime the splitting into chapters should proceed I get the following Error:
./AAXtoMP3: Line 687: n4 is not set.0% (0/23 chapters)

Am I doing something wrong?

[Nicko98]

Hi @nixfuerdiecharts could you please comment the output of ffmpeg -version | head -1?

[Nicko98]

A quick fix for you should be to comment out lines 687 and 689-691, but I'd prefer if you would help me sorting this out!

[nixfuerdiecharts]

Hi @nixfuerdiecharts could you please comment the output of ffmpeg -version | head -1?

ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers

[Nicko98]

Ok, could you please replace line 687 of AAXtoMP3 by
if [ "$(($(ffmpeg -version | head -1 | cut -d \ -f 3 | cut -d . -f 1 | cut -d n -f 2) > 3))" = "1" ]; then
and tell me if this fixes it?

[nixfuerdiecharts]

Ok, could you please replace line 687 of AAXtoMP3 by
if [ "$(($(ffmpeg -version | head -1 | cut -d \ -f 3 | cut -d . -f 1 | cut -d n -f 2) > 3))" = "1" ]; then
and tell me if this fixes it?

^This didn't work out for me. Same error as before. Your quickfix worked for me tho

[Nicko98]

Have you saved the file after changing the line and befor testing it?
That's what normaly is my mistake when a fix doesn't work.
Because I tested
cut -d \ -f 3 | cut -d . -f 1 | cut -d n -f 2
on your
ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
and it does result in 4 just as it is suppsed to.

[smvoss]

cut -d \ -f 3 | cut -d . -f 1 | cut -d n -f 2

Required cut -d '\' -f 3 | cut -d . -f 1 | cut -d n -f 3 for my version string:

» ffmpeg -version | head -1  
ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
» ffmpeg -version | head -1 | cut -d \ -f 3
cut: the delimiter must be a single character
Try 'cut --help' for more information.
» ffmpeg -version | head -1 | cut -d '\' -f 3
ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
» ffmpeg -version | head -1 | cut -d '\' -f 3 | cut -d . -f 1 | cut -d n -f 2
» ffmpeg -version | head -1 | cut -d '\' -f 3 | cut -d . -f 1 | cut -d n -f 3
4

[fabh2o]

Required cut -d '\' -f 3 | cut -d . -f 1 | cut -d n -f 3 for my version string:

Since sed is required, we search for the first number in each row (s/[^0-9]*([0-9]).*/\1/g). But we only want the first line, so we quit after one line (1q)

ffmpeg -version | sed -E 's/[^0-9]*([0-9]).*/\1/g;1q'
4

[Nicko98]

@smvoss
I forgot a space after the backslash. It is supposed to be cut -d \ -f 3 | cut -d . -f 1 | cut -d n -f 2

[Nicko98]

It seems as if github deletes double spaces.

[Nicko98]

» ffmpeg -version | head -1  
ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
» ffmpeg -version | head -1 | cut -d \ -f 3 #with double space after the backslash
n4.3.1
» ffmpeg -version | head -1 | cut -d \ -f 3 | cut -d . -f 1
n4
» ffmpeg -version | head -1 | cut -d \ -f 3 | cut -d . -f 1 | cut -d n -f 2
4

[smvoss]

Also works for me, although I might instead suggest quoting a single space (I tested and it works, cut -d ' ' instead), as it gets rid of load-bearing whitespace and it is a lot clearer what you're going for, in my opinion

[Nicko98]

Ok thanks.
But I think the version fabh2o commented is better since it is more universal.

[KrumpetPirate]

Fix merged, if you need more testing please do so. I'll close the issue in a couple of days regardless.

[dging85]

I am having this same issue but have not been able to remedy it.

when I enter
"AAXtoMP3 --authcode 0000xx00 audiobookX.aax"

A singular audio file is created with the error:
"/usr/bin/AAXtoMP3: line 687: n4: unbound variable/18 chapters)"

I have commented out lines 687 and 689-691 then it produces:

"/usr/bin/AAXtoMP3: line 725: bc: command not found18 chapters)"

I'm uncertain of how to move forward. Thanks for your help.