Opened 3 years ago

Closed 3 years ago

Last modified 22 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 3 years ago by Peter Bennett

Description: modified (diff)

comment:2 Changed 3 years 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. It will have to be moved to the decoding stage for the appropriate tunnel to be used. I believe this may be a bug in the raspberry pi firmware. However the deinterlace does not seem to be documented anywhere other than in forum postings, so I do not know for sure if this is intended.

Version 0, edited 3 years ago by Peter Bennett (next)

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

Resolution: fixed
Status: acceptedclosed

In 4b8862829d98aff2e5baba92ee98e1dd3b505e6b/mythtv:

Fix Raspberry Pi hardware deinterlace

Fixes #13030

comment:4 Changed 3 years ago by Peter Bennett <pbennett@…>

In 8f7475b88902052b1eb27f297370d5f4f22b2aff/mythtv:

Fix Raspberry Pi hardware deinterlace

Fixes #13030

(cherry picked from commit 4b8862829d98aff2e5baba92ee98e1dd3b505e6b)

comment:5 Changed 22 months ago by Peter Bennett

Owner: changed from Peter Bennett to Peter Bennett
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