Bug 106110

Summary:	vaapi encoding with gstreamer 1.14 doesn't work
Product:	Mesa	Reporter:	Christoph Haag <haagch>
Component:	Drivers/Gallium/radeonsi	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED NOTOURBUG	QA Contact:	Default DRI bug account <dri-devel>
Severity:	normal
Priority:	medium
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Christoph Haag 2018-04-17 18:13:04 UTC

It could also be a gstreamer-vaapi bug since it happens only since gstreamer 1.14, but I have seen nobody else complain anywhere, so it must work for some people at least.

RX 480, recent mesa git revisions, Linux 4.15 - drm-next-4.18-wip

To test:
gst-launch-1.0 videotestsrc ! vaapih264enc ! "video/x-h264,profile=baseline" ! h264parse ! matroskamux ! filesink location=output.mkv

With gstreamer 1.14 this never starts encoding and produces a 0 byte file when cancelling with ctrl+c.

With gstreamer 1.12.4 it worked fine.

Comment 1 Christoph Haag 2018-04-17 19:33:30 UTC

remco on #radeon figured out that it works when adding stream-format=byte-stream to the video format, like this:

gst-launch-1.0 videotestsrc ! vaapih264enc ! "video/x-h264,profile=baseline,stream-format=byte-stream" ! h264parse ! matroskamux ! filesink location=output.mkv

Comment 2 Andy Furniss 2018-04-17 20:27:35 UTC

I was on older gits for gstreamer when I saw this around 1.13<something>

matroska and mp4mux didn't work, but raw 264 and avimux did.

I updated to current gits before seeing the workaround and now it seems gstreamer produces junk whatever I do :-).

Comment 3 Andy Furniss 2018-04-17 20:50:38 UTC

FWIW I found the "nothing works" cause = the next commit in gstreamer-vaapi after 1.14 tag =

fa77b2bf vaapiencode: h264: find best profile in those available

With that reverted the additional stream-format=byte-stream makes mkv/mp4 work again.

Comment 4 Christoph Haag 2018-04-17 23:19:45 UTC

According to gstreamer IRC my issue is something that should be reported as a bug to gstreamer. Yours probably too.

Comment 5 Andy Furniss 2018-04-18 08:49:54 UTC

Yea, I filed a bug for the gastreamer-vaapi regression

https://bugzilla.gnome.org/show_bug.cgi?id=795340

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