[Bug 698049] New: omxh264enc openmax API ignore output bitrate on Raspberry Pi

GStreamer (bugzilla.gnome.org) bugzilla at gnome.org
Mon Apr 15 03:30:18 PDT 2013


https://bugzilla.gnome.org/show_bug.cgi?id=698049
  GStreamer | gst-omx | 1.0.6

           Summary: omxh264enc openmax API ignore output bitrate on
                    Raspberry Pi
    Classification: Platform
           Product: GStreamer
           Version: 1.0.6
        OS/Version: Windows
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-omx
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: xlazom00 at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


omxh264enc has input parameter target-bitrate
But it looks like raspberry pi openmax API ignore it
as it don't generate stream with proper bitrate

If you change target-bitrate to any value 
output bitrate is always same


all fine in this example
https://github.com/dickontoo/omxtx/blob/master/omxtx.c

test pipeline

gst-launch-1.0 -v uridecodebin uri="file:///home/pi/test2/input.ts" name=demux
! video/x-raw, format="I420", framerate=25/1, width=720, height=576 !
omxh264enc target-bitrate=500000 control-rate=2 ! video/x-h264, profile="high"
! mpegtsmux name=mux ! filesink location=output.ts demux. ! audio/x-raw,
format="S16LE", rate=48000, channels=2 ! voaacenc bitrate=96000 ! mux.

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