Smart Rendering

[Rich2Putt]

I am not sure if I can explain this but here goes.....

After all the edits, transitions etc......I render the file.

After the rendering, I view the video and need to make a change (edit). I go to the original file and in the time line make a small edit change. Then I select the section that was edited and play back that section only in "smart render".

Now when I go to make a disk and review the video, the edit I made does not appear. That means I need to render the entire file again.

What am I doing wrong?

Thanks.....

[Ken Berry]

If I understand you correctly -- and I am not sure that I do! -- your error is in somehow imagining that changing an original project and setting the program only to smart render the one change, that this will somehow change a video you already made. Just to try to clarify: you have a project in the timeline represented by a .VSP file. It will be made up of one or more video clips. You do your edits, and produce (render) a DVD-compliant mpeg-2 file (File AAA.mpg). Then you realise that file AAA.mpg is not satisfactory. So you go back to the VSP in the timeline, make one change, and set VS only to render that part of the project covered by the change. In realilty, though, the most that that could do is produce a tiny new mpeg-2 file (bbb.mpg) which contains footage of just the change. It cannot change file AAA.mpg unless you in fact did not use the VSP in the timeline, but inserted AAA.mpg in the timeline instead, did the edit -- and then used Smart Render on the whole of AAA.mpg, so that, in theory, it would only render the change.

But the basic message is that you would certainly avoid any possible loss of quality if you were to render the VSP into a new mpeg-2 of the whole project (CCC.mpg). If it was made up of DV format clips, then you would not have to worry about any loss of quality associated with re-rendering. If the project was made up of mpeg-2 clips, then rendering to CCC.mpg will have no further effect on the quality of the original clips than the first render to produce AAA.mpg did.

[Rich2Putt]

Hi Ken,

I believe you understabd what I am trying to do.

I understood from the VS9 manual that you could go back and make edits to the original mpeg-2 file and use "smart render". If this is not the case then why does VS9 have a "smart render"? (not to smart)

I am attempting to make a small edit without re-rendering the entire mpeg-2 again. Is this possible?

Thanks again.........

[Ken Berry]

The problem is that you are talking about apples and oranges! You don't say what the format was of the files you put into your timeline. But whatever they are, your project file (VSP) is NOT a video file (such as .mpg or .avi files). As I understood you, you started off with a file or files (X, Y and Z) in the timeline which you have as a project, which in turn generates a project file (XYZ.vsp). You do your edits and produce AAA.mpg. You realise your error, so you go back and make your small edit to XYZ.vsp, and set it to render only that small edit. If this is what you do, then you will only produce the small bbb.mpg as a new video file as I have already described. AAA.mpg does not enter into this particular picture.

To get a file with your last-minute edit included you can do one of two things: either produce a new file (CCC.mpg) of the entire project as I have described. This does not involve Smart Render or produce any degradation since you are going from a project file and not a video file as such -- in other words, you are simply following the same procedure to produce CCC.mpg as you originally did to produce AAA.mpg, only CCC.mpg will include your final edit.

The alternative is not to go back to XYZ.vsp, but to start a new project and put AAA.mpg into the timeline. You make your edit, then re-render, though using Smart Render this time. With Smart Render you do not set the margins of what is supposed to be smart rendered (in this case, only your small edit). This is the function of Smart Render itself. During the re-render, it remembers what it has previously rendered and does not re-render those parts, but 'sees' that only the little edit needs re-rendering. You thus avoid any loss of quality in the new mpg except in the area of that small edit, and even then you are unlikely to be able to spot any degradation with the naked eye, especially if you only re-render once.

[Trevor Andrew]

Hi

I am attempting to make a small edit without re-rendering the entire mpeg-2 again. Is this possible?
Thanks again.........

NO


The first time you (Share – Create Video File) video studio remembers (for want of a better word) the process. Taking say 3 times the run time.

If you now edit your project (as you have done.)
To include the edit you have to render to whole project again.

This time ‘smart render’ kicks in. You will notice by the time it takes to complete the second render.
Rendering will be very quick, you have to use the same settings as the first render of course.

I have just tested a 2 minute project rendering to Mpeg 2 took 9 minutes (now that’s a long time)

A second render after adding a title to the beginning took 25 seconds. That’s Smart Render.

Trevor

[Rich2Putt]

My gosh I think I understand.......

When I render the very first time, say it takes 30 minutes to render.

Then make my edits, the next time I render it should take very little time because it will only render what I have changed.

Is there a setting for "smart render" or does VS9 automactically know its the second time around to render?

Thank you Trevor and Ken for your input. At my age it takes a couple of times to get things straight.

One more question, will the "smart render" diminish the quaility of the video?

[Ken Berry]

You turn Smart Render off or on (which I think is its default) when you go to Share > Create Video File and select a format. A new, small window appears where you give the new video file a name, and there is a button labelled 'Options' in which you will find 'Smart Render'...