Some questions about af100 output usage and framerate question

G

Gogu

Well-known member
Hello,

I don't know if this has been asked before but I wanted to know if I can use the HDMI and SDI outputs at the same time. One for connecting an external EVF and the other for videoassist purposes or maybe an external recorder.

Another question , do both of the outputs (HDMI and SDI) do 8 bit 422 ?

And what does the camera record by default i couldn't find this either ?

Also is it capable of recording 50/60p at 1080 full HD resolution ? I found some technical specs that said only 720 60p or 1080 50i it was pretty shady and I'm not sure what the truth is.

Thanks.
 
1. Yes.
2. Yes.
3. - what do you mean by default? The onboard recording format is AVCHD, which is h.264/MPEG-4.
4. Yes, but only for slow-mo playback.
 
Thanks.

I don't understand your answer regarding the high speed recording ?

Can it do true 1080p 60p ?

I also found some specs that said it can do 24p but for 25 it records 50i and it converts this into progressive ? is this correct ? I find it strange.

Also the signal that comes out of the SDI or HDMI doesn't have any codec applied to it at the moments it exits the port only the recorder applies a compression ?

Thanks again.
 
It can scan and record 60 progressive frames per second, but does so for slow-mo, not for live playback at 60. If you want 1080/60p for 60fps playback you'd need to change the playback rate in post. Sound is not recorded in variable frame rate mode.

25p is genuine 25 progressive frames per second, recorded as 1080/50i. Same as every other camera does.

Sdi and Hdmi output are the pure uncompressed signals.

Put simply: don't worry, it does it the right way.
 
Now I get it. Indeed I was referring for slow motion applications I don't need 60p as playback speed, ever.

I am intrigued by your statement about the 50i recording. Every camera? I have a EX1, and it has separate settings for progressive and interlaced and I've never heard someone saying it isn't a truly progressive camera. If you do have the patience to expand on this a bit please ?
Why would cameras do this ? Is it a technical limitation ? And is this conversion done properly maintaining the "feel" of motion and preserving the full resolution in a frame (as opposed to interlaced which is 2 half resolution frames) ?
I am all confused now. I thought "cine" cameras like these were recording true progressive frames for quite some time now without any "gimmicks" .

Thanks.
 
It is true progressive, the same way many cameras shoot 30P over 60i.
When you drop the footage into your NLE, it can easily detect the progressive 25 frames and ignore the duplicates, because it's an even division, 50 to 25 is just like 60 to 30. 24P over 60i is a more complicated division and pulldown process, which is why the DVX100B and many other Panasonics used the Advanced 24P with 2:3:3:2 pulldown treatment....so they could wind up at a true 24 frames per second in post.
I'm sure Barry would tell you 25P over 50i is absolutely NOTHING to worry about. It's progressive footage simply "wrapped" in 50i.
 
You must log in or register to reply here.
Back
Top