mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-04 13:45:52 +00:00
b3e089d415
In this commit, we enabled skip_try_fmt_probes quirk in order to speed up the start which is known to be disastrously slow with certain USB cameras. This has the side effect that we needed to rewrite the entire negotiation process in a way that we iterate over the possible caps until we find one that works. The new negotiation method consist of extracting a preferred structure from the peer caps and using this to fixate and sort the caps. To reflect the old behaviour, we sort all resolution strictly bigger to the preferred one with the closes one first. The rest is appended, keeping the same order. We then normalize the caps in case there was some list of interlace-mode or colorimetry left. We finally iterate over all fixed caps and try it. 99% of the time, the first or the second one should work, whit the result of a single S_FMT being issues. From there, it will be relatively easy to introduce new negotiation algorithm. The current algorithm is made for optimal image quality with a scaling sink that sets it's window resolution as preference. This the case if for: v4l2src ! videoconvert ! videoscale ! ximagesink Other strategy would be needed to optimize for non-scaling sink like ximagesink or kmssink when the driver does not scale. https://bugzilla.gnome.org/show_bug.cgi?id=785156 |
||
|---|---|---|
| .. | ||
| directsound | ||
| oss | ||
| oss4 | ||
| osxaudio | ||
| osxvideo | ||
| v4l2 | ||
| waveform | ||
| ximage | ||
| Makefile.am | ||
| meson.build | ||