About Frame ID

[Ushikubo Tomohiro]

Hi.

I want some question about frame ID.

i)Would you tell me maximum number and minimum number of frame ID?

ii)Would you tell me how increase frame ID when frame rate is changed?

iii) Could you tell me how to reset frame ID?

Thanks.

[beckdo]

Hi CatMail:

i) Typically the FrameID ranges from 0 to 2^24-1. It's a 24bit number and it's meant to increment by 1 in the default arrangement.

ii) If you set the Frame Rate to 50% the FrameID will increment by 2, and 25% will increment it by 4.

iii) The FrameID is hardware driven and it's not possible to reset it. However there are simple ways you can simulate a reset in software, by sampling the value and subtracting it off for example.

[Ushikubo Tomohiro]

Thank you for replying my question.

I try to checked frame number. And it is seemed to behave deferment between V100:R2 and S250e about question ii).

In S250e, frame ID increase by 1, nevertheless I changed frame rate. In V100:R2, when I set the Frame Rate to 50% the frame ID increment by 2.

Would you tell me how to unify the increment number rule, in S250e and V100:R2.

Thanks.

[beckdo]

Hi CatMail,

Unfortunately, the implementation of the FrameID is different on the S250e because it allows an arbitrary frame rate between 30 and 250.

As a result, the FrameID will always increment by 1 regardless of frame rate.

Are you trying to do something specific?