PA_INVALID_INDEX, the default value, is unfortunately !0.
Setting the volume before the stream is created will put the ring buffer in error state. Unfortunately, that's what spice-gtk does.
Step 1. Fetch and check out the branch for this merge request
git fetch https://gitlab.freedesktop.org/elmarco/gst-plugins-good.git pulse git checkout -b elmarco/gst-plugins-good-pulse FETCH_HEAD
Step 2. Review the changes locally
Step 3. Merge the branch and fix any conflicts that come up
git fetch origin git checkout origin/master git merge --no-ff elmarco/gst-plugins-good-pulse
Step 4. Push the result of the merge to GitLab
git push origin master
Note that pushing to GitLab requires write access to this repository.
Tip: You can also checkout merge requests locally by following these guidelines.