Question / Help Blackmagic Intensity Shuttle + Canon G25 = 50FPS

[Nikolay Mykhailov]

Good afternoon.

I have 3 devices to streaming:

1) MacBook Apple 2014 (1,4 GHz Intel Core i5, 4 ГБ 1600 MHz DDR3, Intel HD Graphics 5000 1536 МБ)
2) Capture cars Blackmagic Intensity Shuttle 3.0
3) Videocamera Canon Legria HF G25

My camera records video on 1080p50i. The same resolution in the settings of Blackmagic in OBS. I want to steam football matches in 1080p or 720p but in 50FPS. Is it possible with my devices? How I can do it? What settings do I need? Now, I stream 30 fps, but for dynamic scenes it`s not enough. Thank you for your support!

 

[Rodney]

Neither the camera nor the capture card support 1080p50.

 

[Narcogen]

Rodney is right. To clarify, you said:

"My camera records video on 1080p50i."

There's no such thing as 1080p50i. Your camera records at 1080i50. You want to stream at 1080p50, but it looks like your hardware does not support it-- I can say for sure that the Intensity Shuttle does not support it; it supports 720p or 1080i, not 1080p.

 

[Nikolay Mykhailov]

Rodney is right. To clarify, you said:

"My camera records video on 1080p50i."

There's no such thing as 1080p50i. Your camera records at 1080i50. You want to stream at 1080p50, but it looks like your hardware does not support it-- I can say for sure that the Intensity Shuttle does not support it; it supports 720p or 1080i, not 1080p.

Yes, my camera records at 1080i50. In specification BlackMagic:
SD
625i/50 PAL; 525i/59,94 NTSC; 625p/50 PAL; 525p/59,94 NTSC
HD
720p/50/59,94/60
1080p/23,98/24/25/29,97/30
1080i/50/59,94/60

What is it 1080i50? And it can`t be 50 FPS?

UPD. In vMix for Windows, with my camera and capture card, if I set in preset 720p50, it`s really looks like 50FPS.

Thank you for your answer!

 

[Narcogen]

1080i50 is 50 fps *interlaced*. It means that at every refresh (50 times a second) half the vertical lines are refreshed. The next second, the other half of the vertical lines are refreshed. This can be useful to get a picture that *looks* like it has twice the resolution, but uses the same amount of data as a smaller frame. However, this is NOT appropriate for material with fast motion, because this will make the interlaced nature of the footage easy to see.

If you want to do non-interlaced (or progressive, which is what the 'p' in 720p and 1080p means-- it means that at every refresh, EVERY line in the picture is updated, not just half of them) then you should set your camera and OBS to 720p50.