[gstreamer-bugs] [Bug 641405] New: [vp8enc] patch - allow to use best quality

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=641405
  GStreamer | gst-plugins-bad | git

           Summary: [vp8enc] patch - allow to use best quality
    Classification: Desktop
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: bug-track at fisher-privat.net
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


Created an attachment (id=180023)
 View: https://bugzilla.gnome.org/attachment.cgi?id=180023
 Review: https://bugzilla.gnome.org/review?bug=641405&attachment=180023

patch - vp8enc_quality.diff v1

The quality setting in vp8enc disable bitrate handling set static quantizer.

see this part of code, gstvp8enc.c:
      cfg.rc_min_quantizer = 63 - encoder->quality * 5.0;
      cfg.rc_max_quantizer = 63 - encoder->quality * 5.0;

Current max quality is 10. vpx allow quantizer range 0-63, This mean 63 - 10 *
5.0 = 13, this make not really good quality.
If we allow quality 12.4, this will make quantizer=1, also best possible
quality.

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