ivtc filter can cause stuttering

[John Poet <jppoet@…>]

A week ago I started having stuttering problems on two channels: DiscoveryHD and UniversalHD. Both of these channels are recorded via firewire. For a while I thought I was having a problem with any program recorded via firewire, but finally realized it was only those two channels.

After racking my brain trying to think of anything that had changed in my setup, I remembered adding ivtc to my custom filter list. I turned on "playback" debugging, and sure enough, ivtc was being activated inappropriately. After removing ivtc, the stuttering has gone away.

What is interesting about this, is that the stuttering may not usually happen right away. It can take up to 10 minutes before it starts. Once it starts, however, it does not go away.

I am attaching a "-v playback" log.

John

[John Poet <jppoet@…>]

-v playback log

[skamithi]

john for now i'll can tell the ivtc filter to not activate when playing 1080i content.

does the video stutter when watching any other type of channel or when watching an anime/cartoon dvd ?

[skamithi]

apply filter if its less or equal to 720.

[skamithi]

(In [11580]) Closes #2591. enable ivtc filter if video width is <= 720

[skamithi]

(In [14463]) Refs #2591. remove restriction on ivtc filter since video profiles have been introduced and ivtc filter can use mmx for 64bit cpus.