[mythtv-users] mythtranscode interlace issues with 0.25 after upgrade
lynchaj at yahoo.com
Mon Sep 17 20:29:53 UTC 2012
I am a user of Mythbuntu with a pair of PVR-250's. Recently I upgraded to 12.04 (MythTV 0.25) and am having some issues. I record regular NTSC analog cable to MPEG2 via ivtv from the PVR-250's.
In particular, when I specify an MPEG2 recording to be transcoded to MPEG4 I get horrible combing and it looks like the interlace is broken. Sort of like the vertical resolution is cut in half.
If I set the transcoding profile to "pass through" then the video looks fine but of course is still its native MPEG2 and not MPEG4. I searched quite a bit for a solution to the problem but I am not sure what's wrong. This message on MythTV-users sounds a lot like the symptoms I am seeing:
(see paragraph #2)
One person later in the thread above suggested deinterlacing the MPEG2 file before transcoding. I don't know how to do that though. I tried various deinterlace settings on playback to no effect. I confirmed on another computer that the transcoded file itself has the interlace artifacts so it is not a playback issue AFAIK.
Does anyone recognise this problem and know how to fix it? I am sorry if this is a FAQ but I could little information on the problem so I may be looking for the wrong thing. Please help!
Thanks and have a nice day!
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