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avcintra100 1080/60i - frame size and rate

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Craig Alan
avcintra100 1080/60i - frame size and rate
on Mar 29, 2013 at 3:36:45 am

Just want to make sure I got it right in setting frame rate and size in compressor:

for avcintra100 1080/60i

Size: 1920 x 1080

frame rate: 60

is that correct.

any other variables that might effect image in a compressor transcode?

also if I switch to 1080P would those setting be the same?

Mac Pro, macbook pro, Imacs (i7); Camcorders: Panasonic AG-HPX170/AG-HPX250P, Canon HV30/40, Sony Z7U, VX2000, PD170; FCP 6 certified; write professionally for a variety of media; teach video production in L.A.


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Chris Tompkins
Re: avcintra100 1080/60i - frame size and rate
on Mar 29, 2013 at 3:00:22 pm

60i is 60 fields a second not frames. It's 29.97 FPS

What are the clips specs you are putting into compressor?

What is your end destination?

Chris


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Craig Alan
Re: avcintra100 1080/60i - frame size and rate
on Mar 29, 2013 at 4:04:49 pm

Thanks Chris,

I changed the frame setting in Compressor to 29.97. I checked the specs in QT. It got transcoded that way. There does not seem to be any difference in how it plays back from the incorrect 60 FPS.

I'm trying to come up with the best transcode possible to AIC so students can use the footage in Imovie.

What other specs are you referring to?

Am I correct that if I change the system mode to 1080-59.94i record mode to AVC-I100/30PN the frame rate would be 30?

Mac Pro, macbook pro, Imacs (i7); Camcorders: Panasonic AG-HPX170/AG-HPX250P, Canon HV30/40, Sony Z7U, VX2000, PD170; FCP 6 certified; write professionally for a variety of media; teach video production in L.A.


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Chris Tompkins
Re: avcintra100 1080/60i - frame size and rate
on Mar 29, 2013 at 6:46:00 pm

I checked the specs in QT

So what are the specs of the clip right now before conversion?

Why do you want to change from interlaced to progressive?

Chris


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Craig Alan
Re: avcintra100 1080/60i - frame size and rate
on Mar 29, 2013 at 6:58:05 pm

Hi Chris. The specs of the avcintra100 1080/60i before conversion was 29.97 fps. In compressor I had selected 60 fps. Then I reconverted using 29.97. Playback looks the same to me.

The switch to 30pn is in the recording mode in the HPX 250 cam. From other end users I gather progressive is the better choice. Certainly for things like exporting stills and playing back on computer monitors it seems the better. Why would you prefer or under what conditions would you prefer interlaced?
A lot of cable TV is 1080i but where not sending our stuff to them.

Mac Pro, macbook pro, Imacs (i7); Camcorders: Panasonic AG-HPX170/AG-HPX250P, Canon HV30/40, Sony Z7U, VX2000, PD170; FCP 6 certified; write professionally for a variety of media; teach video production in L.A.


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Chris Tompkins
Re: avcintra100 1080/60i - frame size and rate
on Mar 29, 2013 at 7:17:00 pm

When you shoot interlaced (there are many reasons for doing so) you want to edit interlaced.

When you export, if it's for web or computer screen, you THEN make a progressive version.

If you deinterlace before editing you are losing resolution/quality/information in your footage.

If you're just converting footage for editing you should stick to the original format as much as possible.

Convert 1080/60i to 1080/60i or 29.97, it's the same.

Chris


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Craig Alan
Re: avcintra100 1080/60i - frame size and rate
on Mar 29, 2013 at 8:16:47 pm

[Chris Tompkins] "When you shoot interlaced (there are many reasons for doing so) you want to edit interlaced.

"


Thanks Chris, yes i have been staying with interlaced for editing if I shot in interlaced. But most of the feedback I've gotten is a preference to shoot in progressive.

What are the reasons to shoot interlaced?

Mac Pro, macbook pro, Imacs (i7); Camcorders: Panasonic AG-HPX170/AG-HPX250P, Canon HV30/40, Sony Z7U, VX2000, PD170; FCP 6 certified; write professionally for a variety of media; teach video production in L.A.


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