[Bug 758620] New: Increase x264enc bitrate limit > 100Mbps

GStreamer (GNOME Bugzilla) bugzilla at gnome.org
Tue Nov 24 14:13:40 PST 2015


https://bugzilla.gnome.org/show_bug.cgi?id=758620

            Bug ID: 758620
           Summary: Increase x264enc bitrate limit > 100Mbps
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-ugly
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: arjen.veenhuizen at tno.nl
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Currently, the x264enc element allows bitrates in the range: Unsigned Integer.
Range: 1 - 102400 Default: 2048

E.g., up to approx. 100Mbps. To my knowledge, libx264, does not impose such
limit and can easily go over 600 Mbps. For our tests we experiment with 4K in
AVC I-only format, for which we need this kind of high bitrates. My suggestion
would be to increase the limits of this property. Currently we have to resort
to libx264/ffmpeg to meet these needs.

Observed behavior when bitrate is set to above 102400: element defaults to 2048
and shows a warning: (gst-launch-1.0:517): GLib-GObject-WARNING **: value
"200000" of type 'guint' is invalid or out of range for property 'bitrate' of
type 'guint'

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