Dear Maintainer,

gstreamer1.0-wpe (the `wpesrc` GStreamer element, wrapping WPE WebKit for
web-page rendering) depends on libgstreamer-gl1.0-0 (the GStreamer GL
*runtime library*) but not on gstreamer1.0-gl (the plugin package that
*registers* the actual GL elements — glupload, glcolorconvert, gldownload,
etc.). Since wpesrc's entire output is GL memory
(video/x-raw(memory:GLMemory)), any realistic pipeline needs at least
glupload downstream of it — but apt happily installs gstreamer1.0-wpe on
its own with no indication anything else is needed.

Without gstreamer1.0-gl installed, a pipeline like:

    wpesrc ! glupload ! appsink

fails to link at all. The failure is silent and unhelpful: no crash, just
a generic GStreamer parse-time warning buried in GST_DEBUG output:

    no element "glupload"
    link has no sink [source=...]
    link has no source [sink=...]

...and the underlying wpesrc element (specifically its internal
wpevideosrc) then reports "streaming stopped, reason not-linked (-1)" once
it starts, and nothing ever renders. There's nothing in the default log
output that points a user back at the missing gstreamer1.0-gl package —
this took real debugging time to track down (confirmed via
GST_DEBUG=wpesrc:6
tracing) before landing on the actual cause.

I'd suggest gstreamer1.0-wpe gain a "Recommends: gstreamer1.0-gl" (or,
arguably, "Depends:" — I'm not aware of a realistic wpesrc use case that
doesn't need glupload/gldownload downstream, but Recommends is the safer
minimal fix and matches Debian policy's guidance for "usually needed
together but not strictly required").

Afk atm, will pick it up from the end of next week on.

g. Marc

GPG: 827C FD74 BA46 8152 A041 F3A0 7A6A 4F17 5995 A65B

We believe that the bug you reported is fixed in the latest version of
gst-plugins-bad1.0, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1141906@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Marc Leeman <marc.leeman@gmail.com> (supplier of updated gst-plugins-bad1.0 package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Wed, 22 Jul 2026 12:43:45 +0200
Source: gst-plugins-bad1.0
Architecture: source
Version: 1.28.5-2
Distribution: unstable
Urgency: medium
Maintainer: Maintainers of GStreamer packages <gst-plugins-bad1.0@packages.debian.org>
Changed-By: Marc Leeman <marc.leeman@gmail.com>
Closes: 1141906
Changes:
 gst-plugins-bad1.0 (1.28.5-2) unstable; urgency=medium
 .
   * d/control: gstreamer1.0-wpe, depend on gstreamer1.0-gl (Closes: #1141906)
   * d/rules: enable msdk with oneVPL backend
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We believe that the bug you reported is fixed in the latest version of
gst-plugins-bad1.0, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1141906@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Marc Leeman <marc.leeman@gmail.com> (supplier of updated gst-plugins-bad1.0 package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Tue, 28 Jul 2026 09:11:40 +0200
Source: gst-plugins-bad1.0
Architecture: source
Version: 1.29.2-1
Distribution: experimental
Urgency: medium
Maintainer: Maintainers of GStreamer packages <gst-plugins-bad1.0@packages.debian.org>
Changed-By: Marc Leeman <marc.leeman@gmail.com>
Closes: 1141906 1142875
Changes:
 gst-plugins-bad1.0 (1.29.2-1) experimental; urgency=medium
 .
   [ Marc Leeman ]
   * d/control: gstreamer1.0-wpe, depend on gstreamer1.0-gl (Closes: #1141906)
   * d/rules: enable msdk with oneVPL backend
   * New upstream version 1.29.2
   * d/control: update dependencies to 1.29.2
   * d/rules: CK_TIMEOUT_MULTIPLIER=2 (mpegtsmux test) (Closes: #1142875)
   * d/patches: refresh Skip-failing-tests.patch
   * d/patches: refresh Skip-failing-tests-big-endian.patch
   * d/patches: refresh Skip-failing-tests-riscv64.patch
   * d/patches: refresh openssl4-dtls-bio-retry-read.patch
 .
   [ Charles ]
   * Fix FTBS in openssl 4.0
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