Bug found when setting In & Out Points

Eug7 wrote on 8/22/2003, 4:46 PM
This is a new post on an issue I brought up on the below old post. The issue was never responded to adequately. Is this indeed a bug?

http://www.sonicfoundry.com/forums/ShowMessage.asp?MessageID=200545&Page=0

Here's what the manual states: "You can set in & out points if you don't want to burn your entire video file to DVD, it will trim the video to include only that portion between these points."

Then a note that says the original file is not affected by the in & out.

In optimize there is no change to project size regardless of where the In & Out Points are set unless the recompress video box is checked. DVDA message report states that the MPEG will be recompressed. I want to avoid recompression.

Comments

kameronj wrote on 8/22/2003, 6:14 PM
"I'm importing a 2 hour MPEG-2. I want to author the two hour into two 1-hour best quality by utilizing the in & out points. I have my choice render two MPEG's in Vegas or render once and use the in & out in DVDA to author two. "

It's not a bug.

First off...as this post goes - you are talking about two different functions.

As for the quote I pulled from the other post - yes, you are right - you could render two 1 hour files....

But you can also set different in-out points, and have two button on your layout ... button one plays first hour - button two hour two. Setting the in/out points for each will make it so that that is the only part that plays (for each respective button).

The orginal file is not affected in any way (this is true), you will end up with "trimmed' video in your VOB files which DVDA will use to burn with.

Now.....There will be no change in the optimization page based on in/out points. They are just markers. If you start a project off with a 3 gig file, it will be 3 gig as DVDA starts to work with it.

From your example....you are actually not trimming anything. You still have a two hour video. You are just setting in/out points to end up with 2 one hour pointers .... which is still a two hour file.

If it is "too big" and you have to optimize it down...then it will run through a recompression (or so my testing has shown so far). Can't get around that one. But - even if you could....again...by your example - you haven't made any changes to the file - just the in/out points - but it is still a two hour file.

So...unless I"m missing something - DVDA is doing exactly what it is suppose to do and reporting back what it is suppose to report back.

Am I missing somethin?
Eug7 wrote on 8/22/2003, 6:40 PM
kameronj,

read what the manual says:

"You can set in & out points if you don't want to burn your entire video file to DVD, it will trim the video to include only that portion between these points."

What it says is that if, and for discussions sake you start out with a 2-hour MPEG-2 then..."it will trim the video to include only that portion between these points."...upon authoring, but it doesn't work.

Set the In & Out Points got to optimize and see that the file size to author remains the same regardless of In & Out Points.
kameronj wrote on 8/22/2003, 7:39 PM
I know what it says.

I've read your post and you mentioned it a few times.

Now try and understand what I am saying.

"You can set in & out points if you don't want to burn your entire video file to DVD, it will trim the video to include only that portion between these points."

This is absolutely correct.

You don't author anything by setting the in/out points and then go look at the optimize.

You are talking about two totally different things.

Set the in/out points...author the DVD...you will end up with a trimmed version of the file. Think of it a different way.

You take a 1 hour video that you have on your PC, bring it into DVDA, set the in/out points so it only get 30 minutes. Burn the DVD. Give me the DVD. I'm only ever going to see 30 minutes.

If I copied the VOB fils from the DVD - put them on my HD and went to view the file, it would only be 30 minutes.

That what happens AFTER you burn the disc.

OPTIMIZE happens before you burn the disc.

In the example that you stated with - regardless of in/out points - you still have a two hour video. You can set the in/out points all you want, but DVDA is still working with a two hour video. You want less than the two hours - DVDA has to render it.

But your example says want two programs...each of them 1 hour. Maybe in New Math that comes up different...but the way I do math - that is still 2 hours. You haven't changed anything.

So....In/Out Points, Burn DVD, you get trimmed file

Set in/out point, look at optimization - nothing will have changed until after you burn and DVDA does what it is designed to do.



jeffcrow wrote on 8/26/2003, 12:54 PM
The use of the word trim in the manual can seem misleading. But in the video editing world, to trim a video does not mean to make it shorter. It means to mark a point at which the video will start playing and stop playing within the original uncut file. From the vantage point of the viewer, the video appears to be trimmed. But in reality the viewer is only being allowed to see a portion of a larger video file, giving the illusion it has been trimmed. This is what is meant by the phrase "non-destructive editing", which is what Vegas and DVDA do. Your "trims" do not destruct, or change, the original file, it reamains intact.

If you want a portion of video in your DVD and you want to remove the unused portion to save space, this is an editing function. You will need to take your original media into your editor, edit it there, and rerender it to a new shorter video file.