could someone explain why after recording from TV with following settings:
TV station: broadcast SDTV
satellite decoder output set to 576i
and the material originally recorded around 1980
I have to set DAR to 1:78 (not 1:33) to see it properly.
I wouldn't ask such question if I recorded only programs broadcasted in FHD (and decoder output set to 1080i)- but lately I started recording SD material (so I switched decoder to 576i and got confused - of course I can still keep 1080i settings on my decoder and DAR will be OK but I suspect that's not the best solution for recording SD material)
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Thread: DAR confusion
Last edited by adom; 24th Aug 2014 at 04:16.
The video is 16:9, the original material is 4:3 but it's shown with black bars on the edges to fit it onto the 16:9 display, then it was all overlaid with logos. ALL modern TV is broadcast that way. Digital TV is 16:9, when stations play old analogue 4:3 material they add the black bars. There's no mystery here.
Last edited by ndjamena; 25th Aug 2014 at 01:57.
I consider it bad practice to broadbast 4:3 originated programs that way instead of adaptively switching the SD feed between 16:9 and 4:3 depending on the program's original aspect ratio. The big problem with pillarboxed SD feeds is you lose 25% of valuable horizontal resolution and the video will never fit a 4:3 screen again.
I'm afraid there's noting one can do except maybe cropping the pillarbox but thise will leave you with chopped off logos...
Last edited by ndjamena; 25th Aug 2014 at 02:34.
I remove (or at least obscure) channel logos using Avisynth filters. The alpha transparency ones can be reversed almost completely, the more obnoxious coloured ones you can erase and blend in, imperfect but much less distracting.
Anyway, it could be worse. Instead of pillarboxing, some stations crop the top and bottom to make fake widescreen because some idiots complained that 1960s TV shows weren't filling up the screen.
Here in Hong Kong there is a station that shows old shows exclusively. They pillar box them, not black though, they use a floral wallpaper and their logo.
But sometimes they have a widescreen show, then it's both pillarboxed and letterboxed. I can zoom the TV to get a fairly normal frame, though resolution is lost.
Last edited by AlanHK; 24th Aug 2014 at 23:55.