[Bug 786433] New: vaapih264enc: invalid VUI depending on input resolution

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=786433

            Bug ID: 786433
           Summary: vaapih264enc: invalid VUI depending on input
                    resolution
    Classification: Platform
           Product: GStreamer
           Version: 1.10.4
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: blaxar.waldarax at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

When using vaapih264enc, the VUI descriptor in the resulting stream may be
invalid depending on the input image resolution.

Let's consider the following command line:
$ gst-launch-1.0 videotestsrc num-buffers=60 ! video/x-raw, width=1280,
height=720 ! vaapipostproc ! vaapih264enc ! mp4mux ! filesink location=test.mp4

Then, if we use ffprobe on the resulting mp4 file:
$ ffprobe test.mp4

We get the error "[h264 @ 0x12e3d40] Overread VUI by 8 bits"

However, with:
$ gst-launch-1.0 videotestsrc num-buffers=60 ! video/x-raw, width=640,
height=360 ! vaapipostproc ! vaapih264enc ! mp4mux ! filesink location=test.mp4

We only get a warning from ffprobe: "[h264 @ 0x1388d40] Truncated VUI"

And finally, if we go full 1080p:
gst-launch-1.0 videotestsrc num-buffers=60 ! video/x-raw, width=1920,
height=1080 ! vaapipostproc ! vaapih264enc ! mp4mux ! filesink
location=test.mp4

We get no error or warning.

I've tried encoding videos using x264enc in comparison, I get no such issue.

While many video players seem to tolerate an invalid VUI descriptor, it's worth
noting that others don't (like the Safari video player on iPad).

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.