aspect ratio 16:9 option

[fjhdavid]

Dear all,

I use HCenc and I would like to choose aspect ratio 16:9.

What does I have to write in the rebuilder.ini?

I tried HC_ASPECT=16:9 but it doesen't work.

(I don't want to choose the "convert from LB...", as I have already a script and I want to use the sharpen filter at the end of the script)


thanks for your help
Francois

[jdobbs]

The aspect ratio is automatically set based upon the original disc. Does the sharpen filter actually distinguish between 4:3 and 16:9?

[fjhdavid]

no of course but here is my script (PAL disc):

Crop(24,72,-8,-72)
LanczosResize(704,576,taps=2)
FFT3DFilter(bt=-1,bw=32,bh=32,ow=16,oh=16,sharpen=0.7,plane=0)


you see, my original DVD was aspect 4:3 but after the script becomes aspect 16:9

my question is just, how can I write with Hcenc that the final disc is aspect 16:9 in order to be recognized by my standalone DVD player and plasma automatically?

thanks
francois

[jdobbs]

You can't. Even if you truly encode it as 16:9, your player will still play it back based upon the aspect ratio called out in the IFO. When DVD-RB does the conversion (4:3 to 16:9) it also makes the required changes to the IFO. I think you should still be able to use the filter if you use the built in DVD-RB function. I'll have to look at the placing. Just as FYI, here is the default resizing command used by DVD-RB for PAL (assuming the source is not interlaced):

LanczosResize(720,576,0,72,720,432)

[fjhdavid]

and is there a way to implement an access to the command ASPECT (xhich does exist in HCenc) in order to select it and write in the .IFO? (as it is done with AQ and LUMGAIN)

thanks

[jdobbs]

No. If you select the built-in resizer it set's the aspect in the HC INI, but there is no user-accessible way to change it. As I said, unless you manually edit the IFO, it wouldn't display as 16:9 on a standalone anyway. I'm aware that you probably know that, but I try to answer these questions so that anyone browsing would understand as well.

[blutach]

For greater versatility, have a look at HCWrap in MPEG-2 Encoding Forum.

The other thing you can do is to do the convert to 16:9 and after prepare is complete, manually place your filters so they follow the conversion (if that is necessary). Of course, you won't need the crop or resize (as Convert from 4:3LB to 16:9 does that anyway).

Regards

[fjhdavid]

Jdobbs

I edited my 4/3 DVD with pgcedit and changed 4/3 to 16/9 attributes in the .ifo files (video_ts and VTS_), and save changes and powerDVD recognize it now as a 16/9 DVD.

BUT, DVD-RB 1.28.2 and HCenc 0.23 still see it as a 4/3 film !

is there anything else I have to change somewhere (except the .IFO files)?

what are you doing in DVD-RB when the "convert from LB 4/3 to 16/9" is choosen (because I saw this time HCenc recognize it as 16/9)?

thanks
francoi

[blutach]

Of course it will see it that way. 4:3 is flagged as the aspect ratio in the VOBs. Check out the sequence header of any I-frame with VobEdit.

But changing the IFO will override the settingsin the VOB and present the video as 16:9. Of course, if it isn't really 16:9 in the VOBs, it'll look distorted.

Remember, that if your IFO says 16:9, at least one of auto letterbox or auto pan & scan needs to be checked.

Regards