[mythtv-users] FF/RR and jump ahead/back gone all wonky

[Kevin Kuphal]

Michael Carter wrote:

>A week ago or so FF/RR and jump ahead/back on my FC2 MythTV 0.16 w/ PRV-350
>went to hell. For example if I push the >> (jump ahead) button on my remote,
>the video freezes for about 15 seconds, the elapsed time readout changes a bit,
>the recording duration readout goes backwards a few seconds (?!?). After the
>'freeze', the jump ahead completes. The mythfrontend log says:
>
>2005-01-13 22:45:47 DoFastForward: Not enough info in positionMap, we need
>frame 9333 but highest we have is 450
>2005-01-13 22:45:47 SyncPositionMap prerecorded, from DB: 30 entries
>2005-01-13 22:45:47 DoFastForward: Still Not enough info in positionMap, we
>need frame 9333 but highest we have is 450.  Will seek frame-by-frame
>
>/var/log/messages says:
>Jan 13 22:49:52 goldings kernel: ivtv-osd: OSD: (0) DMA Error 0x00000007
>Jan 13 22:49:52 goldings kernel: ivtv-osd: OSD: (1) DMA Error 0x00000007
>Jan 13 22:49:52 goldings kernel: ivtv-osd: OSD: (0) DMA Error 0x00000007
>Jan 13 22:50:16 goldings kernel: ivtv: DEC: (0) DMA Error 0x00000007
>Jan 13 22:50:53 goldings last message repeated 3 times
>Jan 13 22:52:01 goldings last message repeated 4 times
>Jan 13 22:52:43 goldings last message repeated 4 times
>Jan 13 22:52:43 goldings kernel: ivtv: DEC: (1) DMA Error 0x00000007
>Jan 13 22:52:58 goldings kernel: ivtv: DEC: (0) DMA Error 0x00000007
>Jan 13 22:53:44 goldings kernel: ivtv: DEC: (0) DMA Error 0x00000007
>Jan 13 22:55:09 goldings last message repeated 2 times
>Jan 13 22:55:14 goldings kernel: ivtv: DEC: (0) DMA Error 0x00000007
>Jan 13 22:55:14 goldings kernel: ivtv: DEC: (1) DMA Error 0x00000007
>Jan 13 22:55:53 goldings kernel: ivtv: DEC: (0) DMA Error 0x00000007
>Jan 13 22:56:28 goldings last message repeated 6 times
>Jan 13 22:56:28 goldings kernel: ivtv: DEC: (1) DMA Error 0x00000007
>
>
>If too much FF/RR'ing or jumping is attempted, the whole box will lock up.
>
>WAF is negative right now... any advice?
>  
>
Well, the first part about the position map probably indicates bad data 
in your recordedmarkup table.  You can use mythcommflag with the 
--rebuild option to rebuild the data for particular files.  As for the 
last, DMA errors sound like hardware issues but I'm not an ivtv user so 
I can't say what is really happening there.

Kevin