This reverts commit 6f9ae5d7580763b5d18badb76f2166ff0012886a. The _transform_caps() function can't tell the difference between the caller wanting to know the output caps for the current method, or all possible output caps. If it includes caps for all possible methods, glupload can end up negotiating and sending the wrong output caps downstream. Partially reverts !2687 Fixes #1310 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2699>