Originally posted by: Zion
Mostly it's to save space and allow you to encode at a higher bit rate.
That's a good enough reason, considering compression is going to be 25% better.
Originally posted by: Zion
What kind of artifacts are you getting? Macro blocks or something similar? That shouldn't be caused by any IVTC process but perhaps somewhere else in your workflow.
Mostly it's to save space and allow you to encode at a higher bit rate.
That's a good enough reason, considering compression is going to be 25% better.
Originally posted by: Zion
What kind of artifacts are you getting? Macro blocks or something similar? That shouldn't be caused by any IVTC process but perhaps somewhere else in your workflow.
Here are some pics from all of my different TV caps:
It happens in areas of motion, so I picked a shot with a lot of motion. It is evident, though extremely subtle, in almost all shots. It is most evident on the Telemundo cap, and least on the USA. I thought it might be the station compressing the broadcast as MPEG2, but the artifacts are horizontal lines, which leads me towards IVTC as the culprit. The lines are non-existent on the source (29.97) captures, except, of course, for the two interlaced frames. The artifacts on my IVTC'd version are present on all frames, though barely noticable on any but the frames derived from interlaced frames. I used Telecide and Decimate in AviSynth, and no matter what "post" setting I use in Telecide, the result is the same.
There's not much else in my workflow that I can think would be causing this. The caps are DV, I have to convert the colorspace, and then decomb. That's all so far.
Here's another example:
