[mythtv] Wrong time of recordings when using PVR 350

[James Armstrong]

Jay R. Ashworth wrote:

>On Fri, Oct 01, 2004 at 09:29:27AM -0400, James Armstrong wrote:
>  
>
>>>I have done some more systematic testing, and it looks like the
>>>problem actually is related to recording, not playback. Recordings
>>>done with the old driver shows correct time regardless if I play it
>>>back with the old or new driver, recordings done with the new driver
>>>shows wrong time on playback with both old and new driver.
>>>
>>>The fact that it looks like I'm the only one with this problem makes
>>>me wonder it might be some other stuff related to my system that
>>>causes this. The ratio between the wrong and correct time is 0.80, but
>>>25fps/30fps = 0.83, perhaps the time ratio's closeness to 25/30 is
>>>just a coincidence, and it's actually not a PAL-NTSC issue?
>>>
>>>      
>>>
>>I have a similar issue with recording hd content from a pcHDTV card. The 
>>total time is always wrong. Most of the time a 1 hour show shows as 51 
>>minutes when I play it back. I am using myth .16 and ivtv 0.1.10pre2-ck104m.
>>    
>>
>
Not sure where this belongs, but I think we figured out why a hour hd 
recording is showing as ~51 minutes in myth. With roughly 40 minutes of 
show at 24fps (hd) and 20 minutes of commercials at 30fps (sd) I get 
about 52 minutes if the calculation of the recording length is based on 
the fps (i think 30) reported in the recording. 40mins * (24fps/30fps) + 
20mins (30fps/30fps) = 52 minutes. I also have problems jumping 30 
seconds ff or rw on these recordings. The time changes by 10 seconds but 
the video is only changing by a second at the most.

- James