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Old 12th December 2007, 10:50 AM   #9 (permalink)
seemac
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Re: Video Redo - Horrible MPEG transcode - how to fix?

I've tried to do exactly the same thing, put the AFL grand final onto DVD using Video Redo and had two problems. I've spent many hours so far playing with different settings, and get the same result as you describe, although FFDShow doesn't get involved. Actually I get the effect in anything I edit with Video Redo, especially the brighter faster moving images. I intend to chase this up with Video Redo support, but it takes a while to prepare sample snippets and nobody else on the forums complains of the problem so I assume its something I just live with.

I believe the issue relates to the deinterlacing. If deinterlacing is off (in the menus somewhere) the result is unwatchable with the deinterlacing artifacts (like horizontal venitian blinds across the picture). With deinterlacing on, the result is improved but still noticeable and annoying. If I convert the output mpeg then to Divx or H264 the deinterlacing artifacts are removed and the result is ok. I actually get a better result if I leave deinterlacing off in Video Redo and then let the conversion to DivX deinterlace the video - appears to give a higher quality end result.

I don't understand the problem. Since Video Redo doesn't do any transcoding, why is interlacing even an issue when the original DVR-MS plays fine interlaced?

My second problem putting the grand final on DVD is that I had to break it into 2 halves, as it wouldn't fit on one single layer DVD - it only just fits on two. This is fair enough I guess since 3 hours is probably beyond the expected capacity of a DVD. If I lower the quality, the end result is nasty -pixelated, jerky etc. The main problem I'm finding is that I struggle to get anything longer than 1 hour 20 minutes onto a single layer DVD without lowering the quality to fit. Tried to put a movie on the other day that goes 1.5 hours and it doesn't fit. It comes out to 5GB. Lowering the quality doesn't give a good enough result. I would have thought a DVD should be able to hold 1.5 hours of high quality video?

So for now, for the grand final, I have two disks and on certain scenes you can notice the deinterlacing artifacts, but it is watchable.

Haven't tried watching on an interlaced display, such as 1080i. I run my TV at 720p.
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