Display info on Upper/Lower field first

Nounours18200 · Post by **Nounours18200** » Mon Nov 06, 2006 9:28 pm

Hi friends,

I often work on videos that I have not personally encoded: I am looking for a software that could display if it is encoded with Upper field first , or with lower field first.

Does any of you know such a software ?

Thanks,

THoff · Post by **THoff** » Tue Nov 07, 2006 4:39 am

GSpot will tell you:

http://www.headbands.com/gspot/

Post by **Ken Berry** » Tue Nov 07, 2006 5:41 am

We had a discussion of Gspot in this context -- and I think involving Nounours -- a week or so ago, Torsten. The older (stable) version of it does not give the Field Order. The latest ones do, but I noted that when testing it on some of my videos which I know are LFF, it said they were UFF. So I am not all that trusting of its readings...

THoff · Post by **THoff** » Tue Nov 07, 2006 5:53 am

GSpot is being updated about once a week right now, so maybe that issue has been resolved. It did properly detect progressive and lower-field first MPEG video when I tried V2.60b3, and b4 came out two days ago.

Nounours18200 · Post by **Nounours18200** » Tue Nov 07, 2006 6:53 pm

We had a discussion of Gspot in this context -- and I think involving Nounours -- a week or so ago, Torsten. The older (stable) version of it does not give the Field Order. The latest ones do, but I noted that when testing it on some of my videos which I know are LFF, it said they were UFF. So I am not all that trusting of its readings...

You are right Ken, sorry for that, but I am installing my new PC, so there is sometimes a little "mess" between the 2 PCs...

Where can you see the info "UFF" or "LFF" in Gspot ? I do not see it in the main windows, nor in the options ? (I promise that I have removed my sunglasses ! LOL) (version 2.60b2 is installed) .

tks

Post by **Ken Berry** » Tue Nov 07, 2006 11:23 pm

OK -- I also have version 2.60b2 at the moment. And when you open a video file such as an mpeg-2, the field order appears in the right hand half of the screen, and not quite half way down. It appears right under the window for 'Frames/s'. I must download beta 4 to see if the reading has been corrected. It still shows DV/AVI files I downloaded from my Canon mini DV camera via Firewire as being TFF (UFF). They are, of course, lower field first.

EDIT: Since writing the foregoing, I have downloaded the very latest beta 5 version, which was released yesterday. It still shows those DV/AVI files as TFF, while the mpeg-2 file I rendered from them is (correctly) LFF (or BFF in GSpot parlance). So I just don't know what is going on.

FURTHER EDIT: I have now also used GSpot 2.60b5 with Type 1 DV/AVI I captured with my Sony Digital 8 TRV-480E via Firewire and using VS10+. Again, it shows as being TFF, while the mpeg-2 files I produced from it are BFF. I thought there might have been a difference since the other files I had used with GSpot were Type 2 DV/AVI captured with Adobe Premiere Pro 2.0.

THoff · Post by **THoff** » Wed Nov 08, 2006 1:04 am

DV is always lower-field first so it doesn't bother me too much that GSpot gets the answer wrong, and since Nounours18200 asked about "videos that I have not personally encoded", I assumed that this is regarding the MPEG2 format.

If it is about MPEG2 then GSpot correctly displays the field order.

Post by **Ken Berry** » Wed Nov 08, 2006 1:24 am

But if DV is always LFF, why does GSpot consistently show it as UFF? This surely is a fundamental error and must -- equally surely -- cast some doubt over its other readings...

Nounours18200 · Post by **Nounours18200** » Wed Nov 08, 2006 7:34 pm

Well, here is the screen Gspot2.60b2 displays with an MPEG file:

and here is the screen displayed with an AVI file:

In both case, I do not see where the UFF/LFF information is displayed.

Are there some cases for which the information is not properly displayed ??

THoff · Post by **THoff** » Thu Nov 09, 2006 4:04 am

In the screen shot of the MPEG2 file, the "PROG" indicates that the file is progressive, so field order doesn't apply.

Try encoding a video for yourself using both UFF and LFF to confirm that GSpot's information is accurate. It did decode files correctly for me with V2.60b3.

Nounours18200 · Post by **Nounours18200** » Thu Nov 09, 2006 8:04 pm

In the screen shot of the MPEG2 file, the "PROG" indicates that the file is progressive, so field order doesn't apply.

you are right for the MPEG files: PROG is correctly displayed.

Try encoding a video for yourself using both UFF and LFF to confirm that GSpot's information is accurate. It did decode files correctly for me with V2.60b3.

maybe your version 2.60b3 displays the info, but look at the image I posted for the avi file : there is NO information at all related to UFF/LFF with the version 2.60b2

Update:

The version 2.60b02 does not display correctly the info on my machine and crashes very often.
I have installed the latest version 2.60b04, which is much more stable and displays the info more correctly on the ".avi" files I have tried, but NOT on all files: sometimes no info related to UFF/LFF is displayed. Look at the captured screen.

In addition, it does not display "PROG" on some MPEG files I have tested it with.

sjj1805 · Post by **sjj1805** » Fri Nov 10, 2006 2:03 am

You are using the DivX codec. All DivX videos are Frame based.
DivX is not a format that VOB files are made from - namely MPEG2.

Nounours18200 · Post by **Nounours18200** » Fri Nov 10, 2006 9:11 pm

Thank you sjj1805 : you are right, and I understand now...