Can it be done ? Convert and crop 16:9 full HD to 2.35:1 1

[Seefee]

Hi question as above, pls. Can it be done? I thought this could theoretically cut down on the space that a 16:9 movie takes thereby saving memory so longer 16:9 movies might still be able to fit on a BD25 . Any help most appreciated.

[crl2007]

Use this (http://forum.doom9.org/showthread.php?t=143716) to backup your BD50 movies to BD25.

[Seefee]

How does it do this, by further compression of the video stream ? I would rather it cropped to 2.35:1 to preserve the HD detail in that field rather than lose it over the entire 16:9, can it do this ?

[deank]

It won't crop it, but the quality you'll get will be indistinguishable from the original.

[Ghitulescu]

It is possible but you'll loose the ability to play the result on a BD player, in other words, you can use the BD25 as a storage disk (data BD) as opposed to a video BD.

But hey nothing is lost, yet, maybe in the future the BD players would read all kind of media off a BD, like they do today with DVDRs and CDRs.

[Seefee]

It is possible but you'll loose the ability to play the result on a BD player, in other words, you can use the BD25 as a storage disk (data BD) as opposed to a video BD.

But hey nothing is lost, yet, maybe in the future the BD players would read all kind of media off a BD, like they do today with DVDRs and CDRs.

... So you could put it on a hard drive and play the file with a media player such as WDTV presumably ? How exactly then do you go about cropping it ?

[Ghitulescu]

... So you could put it on a hard drive and play the file with a media player such as WDTV presumably ? How exactly then do you go about cropping it ?

1. exactly
2. I don't do this

[crl2007]

You can transcode from 1080p to 720p to maintain BD functionability. But the best way to do backups remains BD Rebuilder. You will not see any differences between the source and the result.

[deank]

If you really insist on doing what you said, you can use multiAVCHD. It supports such crop/zoom feature:

****

I was thinking last night of one option that was missing in the transcode window. I really wanted to be able to 'zoom' some film aspect ratios back to 16:9 so they can fit 100% on my TV screen - much like what some TV broadcasters do when broadcast a 1:2.4 movies. Of course you'd loose some picture info from both sides, but since most movies are shoot even for 4:3 broadcasting - it is not so bad.

The option is in the Crop T/B box in transcode settings. All values with "%H" are zoom/crop factor which you can change to fit the proper resolution.

It is possible to zoom 1920x1080 directly to the anamorphic SD-DVD resolution, removing the black bars, or keep 1920x1080 or resize down to 1280x720... Whatever you wish.

1080p->1080p
http://multiAVCHD.deanbg.com/multiAVCHD_zoom_1080p_org.jpg http://multiAVCHD.deanbg.com/multiAVCHD_zoom_1080p.jpg

1080p->720p
http://multiAVCHD.deanbg.com/multiAVCHD_zoom_1080p_org_2.jpg http://multiAVCHD.deanbg.com/multiAVCHD_zoom_720p.jpg

1080p->SD-DVD/720x480
http://multiAVCHD.deanbg.com/multiAVCHD_zoom_480p.jpg


You can leave just the half of the black bars and not fully expand the frame. Proper values are usually 17%H and 33%H, but you'll have to try it yourself.

720p->720p with half-size black bars
http://multiAVCHD.deanbg.com/multiAVCHD_zoom_720p_org.jpg http://multiAVCHD.deanbg.com/multiAVCHD_zoom_720p_half_black_bar.jpg


Dean
:rolleyes:

[Seefee]

Dean thanks for your post.

So if I want to crop from 16:9 to 2.35:1 will the re-encode take up less memory ? On mastercopy BD's it seems to me that 2.35 takes up less memory.

Also if yes, then for a 2.5hr movie roughly how long would the re-encode take to finish? I have a 1.6-2.8ghz quadcore processor with 8gb ram. Does the program take care of the audio eg downconvert dtshd MA to dts-core ?

[Ghitulescu]

If by memory you wanna say space then it's simple: needed space = duration x bitrate / 8. So the space needed on any medium depends on the chosen bitrate, as the length is the fixed / same.

[Seefee]

Hi,

I tried downloading multiAVCHD and Norton says WS.reputation.1 has been detected and quarantined. Why is this ?

BTW does multiAVCHD convert all HD material to AVCHD ?
Can't it be kept as mt2s ? Can it be made into an iso ?

I still want to crop Avatar to 2.35:1 , I watched it on my PJ in this aspect ratio and IMO it looked even better.

[deank]

Hi,

I tried downloading multiAVCHD and Norton says WS.reputation.1 has been detected and quarantined. Why is this ?

Check http://community.norton.com/t5/Norton-Internet-Security-Norton/What-is-WS-Reputation-1/m-p/237003 this link. It is a serious flaw in Norton for some time now. There is no virus in multiAVCHD for sure. :)


BTW does multiAVCHD convert all HD material to AVCHD ?
Can't it be kept as mt2s ? Can it be made into an iso ?

It will convert the video to AVCHD or Blu-ray structure, where in STREAM folder you'll find the M2TS file, which you can use as you wish. Yes, if you have ImgBurn and enable the option in SETTINGS you'll get the ISO.