Qt4 is dead and going away. Unfortunately, this package seems to have not had any development in the past 5 years as well. If there is no chance to build this with Qt5, it may be time to remove the option.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=18a0653a6e96fefcb68a09f40c216650645575c1 commit 18a0653a6e96fefcb68a09f40c216650645575c1 Author: Andreas Sturmlechner <asturm@gentoo.org> AuthorDate: 2018-02-27 15:55:58 +0000 Commit: Andreas Sturmlechner <asturm@gentoo.org> CommitDate: 2018-02-27 16:13:31 +0000 media-video/tsmuxer: Drop old Closes: https://bugs.gentoo.org/641956 Package-Manager: Portage-2.3.24, Repoman-2.3.6 media-video/tsmuxer/Manifest | 1 - media-video/tsmuxer/metadata.xml | 3 -- media-video/tsmuxer/tsmuxer-2.6.11.ebuild | 60 ------------------------------- 3 files changed, 64 deletions(-) Additionally, it has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=bbd34f942dbf42146a26a6e9d20f44abfd2156d7 commit bbd34f942dbf42146a26a6e9d20f44abfd2156d7 Author: Andreas Sturmlechner <asturm@gentoo.org> AuthorDate: 2018-02-27 15:28:42 +0000 Commit: Andreas Sturmlechner <asturm@gentoo.org> CommitDate: 2018-02-27 16:13:31 +0000 media-video/tsmuxer: Drop USE=qt4 Bug: https://bugs.gentoo.org/641956 Package-Manager: Portage-2.3.24, Repoman-2.3.6 media-video/tsmuxer/tsmuxer-2.6.11-r1.ebuild | 40 ++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+)}