Opened 2 years ago

Closed 22 months ago

Last modified 12 months ago

#13030 closed Bug Report - General (fixed)

Hardware deinterlacing does not work with recent versions of raspbian

Reported by: Peter Bennett Owned by: Peter Bennett
Priority: minor Milestone: unknown
Component: Ports - rPi Version: 0.28.1
Severity: medium Keywords:
Cc: Ticket locked: no

Description (last modified by Peter Bennett)

Sometime after raspbian version 2016-02-09, hardware deinterlacing stopped working. Withe the default setting, no deinterlacing is done. Some settings cause the fallback deinterlacer to be used.

As a work around you can select deinterlacer "Line Double(HW)".

See also https://lists.gt.net/mythtv/users/607966

Alternatively download and use a prior version of raspbian http://downloads.raspberrypi.org/raspbian/images/

Change History (5)

comment:1 Changed 2 years ago by Peter Bennett

Description: modified (diff)

comment:2 Changed 22 months ago by Peter Bennett

Description: modified (diff)
Status: newaccepted

I have done some testing of this bug. It looks to me like the hardware advanced and fast deinterlace may have stopped working with the release of the RPI3. I am unable to see advanced deinterlace working at all on RPI3. Earlier versions of raspbian will not boot on the RPI3.

With a small test program and lots of playing around I have found that advanced deinterlace only works with a tunneled path from decoder to deinterlacer. MythTV normally has the deinterlace as part of the video output stage.

There was a firmware change with firmware version 2d0f7ec (July 8, 2016). The nFlags now carry deinterlace information which must be passed forward with each buffer.

Last edited 22 months ago by Peter Bennett (previous) (diff)

comment:3 Changed 22 months ago by Peter Bennett <pbennett@…>

Resolution: fixed
Status: acceptedclosed

In 4b8862829d98aff2e5baba92ee98e1dd3b505e6b/mythtv:

Fix Raspberry Pi hardware deinterlace

Fixes #13030

comment:4 Changed 22 months ago by Peter Bennett <pbennett@…>

In 8f7475b88902052b1eb27f297370d5f4f22b2aff/mythtv:

Fix Raspberry Pi hardware deinterlace

Fixes #13030

(cherry picked from commit 4b8862829d98aff2e5baba92ee98e1dd3b505e6b)

comment:5 Changed 12 months ago by Peter Bennett

Owner: changed from Peter Bennett to Peter Bennett
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