Intermediate resolution between 352x240 and 528x480 ?
I've been experimenting with different resolutions and was wondering if there was an "official" resolution between 352x240 and 528x480. I've tried 352x480 but I wanted another that will also up the horizontal as well as the vertical. I know that the DVD player will "fit" these resolutions so they will appear normal during playback and just wondering if there are others resolutions that people are using that have worked.
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480*480 is official SVCD (NTSC) resolution.
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Yep, tried it but it doesn't work too well with my player. I was thinking something around 400x360.
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Do you encode mpeg1 or mpeg2? You can try all mpeg1 resolution but multiplexing like SVCD and burning like SVCD. |
You can also burn your MPEG-1 Files as VCD.
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I've been doing KVCD MPEG1 352x240/288 fine for a while now. I then got a hold of a KSVCD at 480x480 and my DVD player played it fine. When I tried to do my own KSVCD my prediction using TOK would show a CQ in either the 50's or 60's at 480x480 and my player would sometimes play it and sometimes not. So what I'm trying to get at is a compromise resolution using MPEG1 where it's greater than 352x240/288 but less than 480x480 so that I can encode it with a higher CQ, either in the 70's or low 80's in order to get a better picture.
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480x480 with a CQ of 60 looks better then 352x240 with a CQ of 70. :wink: |
"Can look", or "should look" if you want but nothing is absolutly sure for all sources.
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352*240 mpeg1 and mpeg2 352*480 mpeg1 and mpeg2 480*480 mpeg1 and mpeg2 528*480 mpeg1 and mpeg2 544*480 mpeg1 and mpeg2 704*480 mpeg1 and mpeg2 720*480 mpeg1 and mpeg2 Mux each one (even without sound) to make mpg's. (KVCD and KSVCD) Burn a CD-RW like VCD with mpeg1 and mpeg2 muxed like VCD. Test it in your standalone. Write down results. Erase the CD-RW and burn it again, this time with mpeg1 and mpeg2 but muxed like SVCD. Test it in your standalone. Write down results. It is all. Remember that for 1 CD80 target, low bitrates, it is better mpeg1. Select better resolution and muxing type that agree with your needs. Edited: Corrected 2 firsts resolutions like rendalunit points me. |
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If your source is say 512x368 would it be better to "down" the 368 value to 240 or "up" it to 480?
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with 368 as original height, I will go to 480. In fact I will go the the value taht gives the less A/R error on Moviestacker. |
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But, can you tell me why, if tv always enlarge width to 704. It is TV or standalone enlarging, better than encoder enlarging? |
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When you reduce a frame before to encode it, you reduce the number of the defaults (the smallest ones disapear). So the TV enlarge a denoised picture. If you enlarge with the encoder, you enlarge the defaults and the TV will enlarge them a second time. This process is known in picture processing as "erode/disolve" process. |
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Am I wrong if i think that filters in V4 script permits to reduce noise enough to enlarge resolution safely? Is the final selection a taste question? See you Phil. Thanks. |
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Filters in the script are designed to work in "reduce only" way. If you enlarge, you will need to modify (a little) the script. Quote:
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Can you teach me to modify it, in a particular and in a general way? |
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You see, is like a chief that does a recipe : he tastes, he think that a little more salt will be better and add a little, then tastes again... but he won't add pepper because he knows for sure that pepper won't be good for that recipe. Doing a script is quite the same thing :-( But I can tell you how work : I do everything with the "avisynth" tab of ffdshow. You can add/remove filters and see the result "on the fly" without even stop the play of the video. I use it throught zoomplayer. This way I can adjts a script very quickly. |
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