Hello,

I'm encoding .vob files into a mp4 and want to keep the original resolution of the movie (here 720 * 576 pixels, as for most classic DVDs). I thus specify AVS to keep the original resolution of course, but when displayed in MediaInfo, the resulting file shows 1024 * 576 (eventhough when playing the file, it definitly looks like the original 720 * 576 resolution).

I know this question could all the same be asked to the MediaInfo guys, but do you people have any idea why such a change occurs in the resulting log? (and does it actually affect the video somehow eventhough it doesn't show?)

Thank you.

To: Fañch

Dear user,

Can you check the aspect settings of the created video in some PC players installed on your PC, what do they show in screen resolution?

If you import the created video (if it is DVD please use VIDEO_TS.IFO as an input file from VIDEO_TS folder) into AVS Video Converter and press the Advanced button - Conversion options - what frame size does it show?

Please specify what preset you selected to convert your video to, or what settings you used on the output video.

Thank you for the information.

Kind regards

To: Nat

Hi Nat,

You'll find attached three screenshots from AVS Video Converter conversion options to MediaInfo and MPC displays.

To sum it up, AVS input shows all at 720*576, while the others show at the output a 1024*576 resolution (yet again, the player's - MPC here - screen behaves likes a 720*576).

To: Fañch

Dear Fañch,

Thank you for the detailed description of the problem and the screenshots attached.

Actually what you set up in AVS Video Converter as original - is not frame size, but frame rate (that can be 24; 25; 29,97 and other frames per second).

To preserve the frame size, please press the Advanced button and in Frame Size set 720*576 - see the screenshot attached, then convert the file once again.

Please let me know if I can be of any further assistance.

Kind regards

To: Nat


Hi Nat,

If I'm not mistaking, there's two "Original" buttons in the advanced tab, which are dedicated to 1/ The framerate (as you said) and 2/ the frame size.

I indeed chose "original" for framerate since I don't want to change it - so that was on purpose. And following the same idea, I thought leaving the "original" button checked beside the frame size properties (see attached screenshot) would simply leave the frame size as it is, ie. 720*576. But then it changed to 1024*576.

I'll run a test now with the frame size set at 720*576 as you said (but that makes me wonder about the purpose of the "original" button I just mentioned...) and will report tomorrow.

Ok, encoding processes done. A few figures first:

Original VIDEO_TS source features:

Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 2.40:1

The result with a customized input of 720*576 is a stretched picture:

Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 5:4

While leaving the "original" button checked leaves a good aspect ratio, but strangely gives the following 1024*576:

Width : 1 024 pixels
Height : 576 pixels
Display aspect ratio : 16:9

Right now, I feel like I'll just leave it to the latter as the resulting aspect ratio suits me. But that 720 -> 1024 change remains a mystery to me...

Could an added "AR flag" in the DVD be the answer?

http://forum.doom9.org/archive/index.php/t-85408.html

or

http://forum.videohelp.com/threads/337016-1024-576-resolution-not-full-screen-in-mpc

When playing one of the .vob files into MPC, and checking the file properties, it says "720 x 576 (AR 455:192)".
If I had to take a guess on where the change I'm talking about comes from, I'd take it on this "flag".

If you guys (Nat?) here have any other clue/confirmation about it, I'll be happy to learn some more.

A last link for the sake of knowledge :

https://discussions.apple.com/thread/3522267?start=0&tstart=0

I feel like the answer lies there, but that's kind of greek to me still.

To: Fañch

Dear Fañch,

We here deal with different values of AR (aspect ratio) and the way they are treated in different programs.

Usually Display Aspect Ratio (DAR) value is equial to Frame Aspect Ratio (FAR) x Sample Aspect Ratio (SAR), e.g. 16/9 = 1440/1080 x 4/3.
To avoid problems with created file playback on digital and home players, SAR value in AVS programs is set to be 1:1, thus In AVS Video Converter the DAR is equial to FAR (frame aspect ratio) value on the output created video.

In the input video the DAR value is not equal to FAR (DAR=FARxSAR and you do not mention anithing about the SAR), while in the output DAR 16:9 = FAR 1024/576.

Please let me know if I can be of any further assistance to you.

Kind regards