nanoflash

C

camboy

Member
hello,
i think to buy a nanoflash, because most of the time there is no time for converting the material. i am confussed what i read about slowmo and the nanoflash. as i understand i can not have an 25p output signal and then record slomo. is this correct. does it mean i have to record interlaced. i am really confussed as i never befor used a external recorder.
does the nanoflash start and stop recording via the sdi signal?
please help.
thanks very much
 
nanoFlash

nanoFlash

camboy said:
hello,
i think to buy a nanoflash, because most of the time there is no time for converting the material. i am confussed what i read about slowmo and the nanoflash. as i understand i can not have an 25p output signal and then record slomo. is this correct. does it mean i have to record interlaced. i am really confussed as i never befor used a external recorder.
does the nanoflash start and stop recording via the sdi signal?
please help.
thanks very much
Click to expand...

Dear Friends,

The nanoFlash can accept 720p up to 60 frames per second, and 1080p up to 30 frames per second.

Thus, one can select a timeline of 720p24 or 720p25, or 1080p24 or 1080p25, and then record more frames per second, thus providing a slow-motion effect.

For 720p23.976 (23.98) or 24, or 25, this can be a reasonable slow-motion effect as the maximum number of frames that the nanoFlash can record in 720p is 60 frames per second.

For 1080p, the nanoFlash is limited to recording 30 frames per second (this is the limit of a single HD-SDI 1.5G cable).

Thus, for 1080p, the "slow-mo" ratio is limited to 1.25 to 1. (30 divided by 24).

This is ok for a slight slow-motion effect, but it is now what is considered to be significant slow-motion.

All of the video recorders in this class, those that support HD-SDI 1.5G (and not 3G or Dual Link) have the same limitation.

On the other hand, our Gemini 4:4:4 (a more expensive recorder) can record 1080p60 as it supports HD-SDI 1.5G, HD-SDI 1.5G Dual Link, HD-SDI 3G and HD-SDI 3G Dual Link.

One would not want to record slow-motion in interlaced (in my humble opinion).


The nanoFlash can start and stop on incrementing timecode, using Record Run timecode.

We hope to add HD-SDI trigger for the nanoFlash as soon as practical.

I hope this helps.

You may contact me via the numbers listed at the bottom of this link:

http://www.convergent-design.com/Support.aspx
 
Dan Keaton said:
The nanoFlash can start and stop on incrementing timecode, using Record Run timecode.

We hope to add HD-SDI trigger for the nanoFlash as soon as practical.
Click to expand...

Can someone explain the difference between "start and stop on incrementing timecode using Record Run" and "HD-SDI trigger"? I think I know what the latter is (nanoFlash starts and stops recording at the same time as you press camera record button). But what's the former? Thank you.
 
Nanoflash starts and stops when it detects a timecode on the incoming data stream, as opposed to a specific "strart" bit from the HD-SDI stream.
 
cuervo said:
Nanoflash starts and stops when it detects a timecode on the incoming data stream, as opposed to a specific "strart" bit from the HD-SDI stream.
Click to expand...

Thanks. So are these two ways functionally identical? Is one better than the other?
 
aly324 said:
Thanks. So are these two ways functionally identical? Is one better than the other?
Click to expand...

No, they're not - because you can leave the time code running continuously when using free run time code (for example, because you're using multiple cameras and you want their time codes to be roughly the same to make editing easier). In this case the Nanoflash, if set to record when it detects a rolling time code, will end up recording all the time. Likewise, if you play back some clips on the camera, it will record those as well.

In contrast, the SDI trigger is basically the camera shouting 'I'm recording now' and 'I've stopped recording now'. It does this whether using record run or free run time code and can be used to auto trigger a recording device (the Samurai has this ability). However the FS700 doesn't have the SDI trigger activated.
 
Colinelves said:
No, they're not - because you can leave the time code running continuously when using free run time code (for example, because you're using multiple cameras and you want their time codes to be roughly the same to make editing easier). In this case the Nanoflash, if set to record when it detects a rolling time code, will end up recording all the time. Likewise, if you play back some clips on the camera, it will record those as well.

In contrast, the SDI trigger is basically the camera shouting 'I'm recording now' and 'I've stopped recording now'. It does this whether using record run or free run time code and can be used to auto trigger a recording device (the Samurai has this ability). However the FS700 doesn't have the SDI trigger activated.
Click to expand...

Got it. Thanks!
 
Don't want to steal the thread but seeing as you've come to a conclusion I have a question regarding nanoflash and FS700:)
How does over-crank work? If you shot in let's say 120fps does nanoflas record this or doesn't it?
 
KINOKS said:
Don't want to steal the thread but seeing as you've come to a conclusion I have a question regarding nanoflash and FS700:)
How does over-crank work? If you shot in let's say 120fps does nanoflas record this or doesn't it?
Click to expand...

I can only talk difinitively about the Samurai, but since the Nanoflash has the same limitations (I cannot record 50p/60p only 50i/60i) i'd say it is safe to assume it is the same

i.e. it can record the slow mo buffer play out, but only interlaced (not progressive).
 
Oh and changing the camera to 720p doesn't help as 720 lines is only a record option on regular or slow mo filming. When you go into super slow mo the camera will only record at 1080. Changing the output to 720p/480i also doesn't help as the camera simply outputs nothing during the buffer play out when this option is selected. So, as it stands, the only options are interlaced with the Nanoflash, Samurai or pix or progressive with the (more expensive) Gemini or AJA ki pro quad (when it comes out).
 
Oh... I see... So as of now for slo-mo work you're stuck with AVCHD at 24Mbs.
That's a downer.
 
No, you can use Phantom RAW, Red Raw, DPX via the Gemini or a whole bunch of interlaced formats via the Nanoflash et al.
 
Oh, okey. So FS700 has a dual link HDSDI? But then again this recorders are all really expensive, so I don't see them as a realistic option I guess.
 
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