704x576 or 720x576

[fjhdavid]

dear all,

I use dvd-rb to transform non-anamorphic DVD to anamorphic DVD.

my non-anamorphic DVD are PAL: 704x576 disc (recorded from a satellite box)

after the crop filter, do I have to do a lanczos(704,576) or a lanczos(720,576) to get the best results?

thanks
Francois

[jdobbs]

DVD-RB recognizes 704x576 and treats it appropriately. The only difference between 704 and 720 sources is that one includes the overscan. If you resize something to 720 that was originally expected to be output using 704, you will be stretching the picture horizontally.

Of course I'm assuming you are using the built-in feature of DVD-RB Pro to do your conversion from non-anamorphic to anamorphic. If you are doing it yourself (like maybe with the freeware version), then you should still keep the ratio consistent. Also -- if doing it manually, you need to remember to treat interlaced souces differently. For interlaced you must separate fields, resize each field, and then weave it back. The Pro version does that for you automatically.

[fjhdavid]

Thanks for this answer:

I use DVD-RB pro 1.26.3 but to be honest, I am a little bit lost:

my DVDs are all letterboxed PAL DVD recorded from satellite box and coming from film. Then with DGindex it is told that they are interlaced (even if they are coming from progressive film?), Bt.601 compliant and 704x576.

I use CCE to encode.

I use FFDshow to correct a red color push which occured during analog /digital conversion with my DVD recorder.


Finally my script is:

Crop(0,72,0,-72)
ConvertToRGB(interlaced=true)
RGBAdjust(0.97,1,1,1,0,0,0,0,1,1,1,1)
ConvertToYUY2(matrix="rec709",interlaced=true)
LanczosResize(704,576,taps=2)


then the DVD-rb add in my script an automatic line which is:

ConvertToYUY2(interlaced=true)


my questions are:
1- Is my script correct? (taking into account all my DVD specifications)
2- what is the way to erase the automatic and last line ConvertToYUV2? is it necessary for speed question?
3- is there a global way to things in a better way with a new script or choices?

thanks for your help, it should be great for me
Francois

[jdobbs]

Two things you could do:

1. In DVD-RB, click on the OPTIONS tab. Then select AVS OPTIONS, AVS Expert Options, and then select "Convert from LB 4:3 to 16:9).

2. Use your existing script but change the LanczosResize line to this:

SeparateFields().LanczosResize(704,288,taps=2).Weave

This is necessary to keep the integrity of the fields during the resize of truly interlaced sources.

But -- if your source is actually progressive (e.g. from a FILM source), but is being flagged as interlaced because of the way it is being recorded (highly probable) -- you may want to try setting the "Disable Interlaced", along with option 1, letting DVD-RB handle it, and remove your resizing code completely.

[fjhdavid]

this is very clear for the resizing function.

if my source is actually progressive (e.g. from a FILM source), but is being flagged as interlaced because of the way it is being recorded, do I have to force iPP= false in the MPEG2Source() command?

I then will read the re-encoded DVD with a standart DVD player

[jdobbs]

No. Just set the option in DVD-RB and let it run. It does everything that needs to be done.