https://bugs.gentoo.org/831487 Reproducible: Always A patched ffmpeg-5 is needed to fix this build issue because the `av_stream_get_first_dts` bit doesn't exist in the current ffmpeg-5. At least that's how Arch Linux makes their qtwebengine patch which is also used here work. After applying the patch to ffmpeg-5.0.1 qtwebengine built fine with USE="system-ffmpeg". The patch used by Arch Linux: https://github.com/archlinux/svntogit-packages/blob/packages/ffmpeg/trunk/add-av_stream_get_first_dts-for-chromium.patch
Why open a new bug and only block an already existing one? You just repeat info already present in #831487 and have no new, additional information. Better use the already existing bug for additional info on the issue. *** This bug has been marked as a duplicate of bug 831487 ***
