Native Dimension option ? What is it for

[1moe]

Action: (Send to QT Movie , HD 220 10 bit, avid dx hdcodec)

I had to Export / Import – because my footage was shot w/ two different from rates. (Day 1, & Day 2)
I converted (Day 1) 720p/60 to 1080i/59.94
At the time I used the Native Dimension option ( 320x 240)
I still don’t know what the means.
When I import the clip back to Avid is it still 16.9?

I did pick up shots on a Cannon 16.9, had to convert that also to 1080i/59.94 (Day 3)

Now that I’m putting Day 1, 2, 3 into the timeline, I’m wondering if the footage is going to be squared or letterboxed?

Day 2 – was never converted.

So, my question is did choosing Native Dimension option vs. the 16.9 square pixel option change the footage from letterbox ( I don’t see black bars) to square



Camera - Panasonic P2 Cards, and Canon, Computer - PC- XP ,
MC 3.5 academic version

<Video ValidAudioFlag="false">
<VideoFormat>MXF</VideoFormat>
<Codec>DV100_1080/59.94i</Codec>
<FrameRate DropFrameFlag="false">59.94i</FrameRate>
<StartTimecode>05:43:52:10</StartTimecode>
<StartBinaryGroup>E700248E</StartBinaryGroup>
<Pulldown>2:3</Pulldown>
<AspectRatio>16:9</AspectRatio>
- <Manufacturer>Panasonic</
<
This error also appears

Desktop Video setup failed (most likely due to display hardware model or driver version).
A backup strategy will be attempted. This may cause several symptoms in the video display on the desktop:
Incorrect luma/chroma conversion to RGB
Shifting of luma/chroma at start/stop of play
Full Screen Play will not function
Desktop video may not function for full resolution play of HDMCBootstrap::gwhoami =

 

[1moe]

so don't use native dimensions option?
320x240 was the option that came up automatically. ..
so, right now my sequence has clips with 320x240 (native dimensions), along side the Day 2 footage that I never converted because it was already 1080i/59.94 ..which means ?....the sequence is it square and rectangle ?
I think I exported with custom settings
but I see if I use SAME AS SOURCE
they give the option DV (1280 X 720) , 4:3 ( 960X720) , 16.9 SQ PIXEL (1280 X720)
Should I use the DV (1280 x 720) or 16.9 sq pixel (1280 x 720)..?? (i'm trying to make everything capable with the p2 footage)
I have already export/ import 100 clips, (wrong perhaps)
w/ 3.5 I was not able to open clips with different frame rates, ( in the same bin)
With 4.0 - they will automatically change the frame rates? because the canon shots were 30fps, how will the finish product look, if I have the different frame rates in the timeline?
thank you