key modifiers not recognised in input.conf

[Tomislav]

I created ~/.mplayer/input.conf with the following content:

RIGHT seek +5
LEFT seek -5

This successfully reduces the seek size from the default 10s to 5s. I then updated it as follows:

RIGHT seek +5
LEFT seek -5
SHIFT+RIGHT seek +1
SHIFT+LEFT seek -1

This syntax is suggested here: https://www.reddit.com/r/linuxquestions/comments/jikic3/mplayer_doesnt_read_inputconf/

With this file, not only does SHIFT+RIGHT not work, but neither does just RIGHT, i.e. mplayer seems to consider the last 2 lines invalid (why?) and ignores the first 2 lines as well (and it should not, I believe).

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: mplayer 2:1.3.0-8build5
ProcVersionSignature: Ubuntu 5.4.0-126.142-generic 5.4.203
Uname: Linux 5.4.0-126-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sat Oct 15 10:18:29 2022
InstallationDate: Installed on 2017-02-18 (2064 days ago)
InstallationMedia: Ubuntu 14.04.5 LTS "Trusty Tahr" - Release amd64 (20160803)
SourcePackage: mplayer
UpgradeStatus: Upgraded to focal on 2022-08-02 (73 days ago)