[mythtv-commits] Ticket #11899: Garbled CCs on some stations

[MythTV]

#11899: Garbled CCs on some stations
-----------------------------------+----------------------------
 Reporter:  faginbagin <mythtv@…>  |          Owner:  stichnot
     Type:  Bug Report - General   |         Status:  accepted
 Priority:  minor                  |      Milestone:  unknown
Component:  MythTV - Captions      |        Version:  0.27-fixes
 Severity:  medium                 |     Resolution:
 Keywords:                         |  Ticket locked:  0
-----------------------------------+----------------------------

Comment (by stichnot):

 A few observations so far.

 1. Mostly (but not entirely), the garbling is because roughly half the
 characters aren't being displayed.

 2. xine shows almost exactly the same garbled captions as MythTV.

 3. As noted, ccextractor (version 0.65 in my case) produces very clean
 captions.

 4. If you combine the captions from fields 0 and 1 by setting field=0 at
 the beginning of CC608Decoder::FormatCCField(), most (but not all) of the
 caption characters are correctly displayed.

 Especially in light of the xine behavior, I suspect an upstream ffmpeg
 problem, though it's also possible that it's a problem in our
 avformatdecoder.cpp.

--
Ticket URL: <http://code.mythtv.org/trac/ticket/11899#comment:2>
MythTV <http://www.mythtv.org>
MythTV Media Center