[vdr] BUG: Incorrect playback times for radio channels

Patrick Mackin patrick.mackin at bakervaluation.com
Mon Mar 5 22:05:58 CET 2007

I have noticed a potential bug in playing back radio channels.  The playback time of recorded radio channels is inflated by almost 40%.  This has been confirmed on four North American satellites on three different providers.  The reported time for a 10 minute recording will consistently appear as 13:47.  Some have hypothesized the problem comes from the fact that vdr's timers are based on video frame rates, which of course don't exist on radio channels.

World Radio Network (wrn.org) is one example, and is broadcast on satellite worldwide, so perhaps this can be confirmed on other sats outside NA.  The timing problem makes it very difficult to skip commercials or "top of the hour" news reports or to skip between programming that occurs, for example, every 30 minutes.  In America, I have made observations on Telstar5.  In Europe, you can try Sky Digital (Eurobird 1, 28.5E) or Eutelsat Hotbird 6 (13E) or Afristar (paytv).

Additionally, there appears to be a problem that some have reported with certain NA provider varying the video frame rate, causing *underreporting* of playback time, which would seem to confirm this hypothesis.
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