[Bug 751554] New: GstVideoEncoder could expose a "max-keyframe-distance" property

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=751554

            Bug ID: 751554
           Summary: GstVideoEncoder could expose a "max-keyframe-distance"
                    property
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: mduponchelle1 at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

>From IRC:

<Mathieu_Du> Hm I've got an interesting issue here, so youtube says
"key-int-max" should be half the framerate, I'd like to have that in the
preset, seems a bit involved tho
<__tim> you can't really specify that currently
<Mathieu_Du> Yep that's understandable
<Mathieu_Du> Alternate solution would be to have a key-int-max / framerate
ratio in x264enc, but that might be a little too specific ?
<Mathieu_Du> (as a new prop)
<__tim> max-keyframe-distance in nanosecs perhaps

[snip]

__tim> the encoder base class can probably "enforce" that even if the encoder
supports forcing keyframes

[snip]

<__tim> the encoder can still set key-int-max based on that property
<__tim> the base class handling is just a fallback really

So yep, being able to specify a maximum keyframe distance in nanoseconds would
be a valuable addition, and putting that in the baseclass would indeed allow
enforcability, what do you folks think ?

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