[Bug 797302] New: rtpulpfec causes h264 artifacts with FEC overhead > 0 and netsim = 0

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=797302

            Bug ID: 797302
           Summary: rtpulpfec causes h264 artifacts with FEC overhead > 0
                    and netsim = 0
    Classification: Platform
           Product: GStreamer
           Version: 1.14.x
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: alxgag3 at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 373960
  --> https://bugzilla.gnome.org/attachment.cgi?id=373960&action=edit
Picture of receiving stream with FEC=1, netsim=0

Based on slomo rust example which uses vp8 I´ve implemented a h264 example. 
However, the FEC overhead causes artifacts on receiving stream despite netsim =
0 (no network loss).

I´ve tried with multiple bitrates, GOP lengths and inputstreams. When FEC = 0
everything is fine, but from 1 to 100, artifacts appear.

Tested on:
macOS High Sierra and Ubuntu 18.04, both running gstreamer 1.14.4

Code:
https://github.com/alexagv/gstreamer-rs/blob/h264-fec/examples/src/bin/rtpfecclient.rs
https://github.com/alexagv/gstreamer-rs/blob/h264-fec/examples/src/bin/rtpfecserver.rs

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