Video Lag and Jittery with my new EVO 2 Pro

Ram · Nov 9, 2020

Hi. While I fly my E2P, the FPV in my screen flows smooth, but when I check the SD card, the video jumps, jitter and loss frames... I'm using a Scandisk Extreme 64 Mb UHS-3 SD card. The card supports 30 Mbs (V30) but Autel recommends UHS-3. Any ideas?

rcee · Nov 10, 2020

UHS 3 is non existing, UHS 2 are cards with 16 pins and UHS 1 is what you need. Dont mix it up with the older standards.

A sandisc Extreme should do the job without problem. make sure you format the card in the drone itself and verify if your card is genuine, there is a lot of fake cards out at amazon etc.

If you play it from a PC browser check if your browsers hardware accelleration is on. That makes a huge difference.

Ram · Nov 10, 2020

rcee said:
UHS 3 is non existing, UHS 2 are cards with 16 pins and UHS 1 is what you need. Dont mix it up with the older standards.

A sandisc Extreme should do the job without problem. make sure you format the card in the drone itself and verify if your card is genuine, there is a lot of fake cards out at amazon etc.

If you play it from a PC browser check if your browsers hardware accelleration is on. That makes a huge difference.

I disagree. UHS 3 exists.

UHS Speed Class was introduced in 2009 by the SD Association and is designed for SDHC and SDXC memory cards. UHS utilizes a new data bus that will not work in non-UHS host devices. If you use a UHS memory card in a non-UHS host, it will default to the standard data bus and use the "Speed Class" rating instead of the "UHS Speed Class" rating. UHS memory cards have a full higher potential of recording real time broadcasts, capturing large-size HD videos and extremely high quality professional HD.

UHS Class	Minimum Speed
1	10MB/s
3	30MB/s

I'm wondering if the 100 Mbs of the video transfer of the E2P is too much for write a 30Mb/s of the card... By the way, I don't have this problem with the Mavic 2 Pro at 4K and the Mavic Mini at 2.7K.

rcee · Nov 11, 2020

Ram said:
I disagree. UHS 3 exists.

You are right in this, the stndards did a catch up on me

I included a overview.

Ram said:
I'm wondering if the 100 Mbs of the video transfer of the E2P is too much for write a 30Mb/s of the card... By the way, I don't have this problem with the Mavic 2 Pro at 4K and the Mavic Mini at 2.7K

Easy to test? Try to capture some footage on the E2P internal memory and compare it ?

Ram · Nov 11, 2020

rcee said:
You are right in this, the stndards did a catch up on me
I included a overview.

Easy to test? Try to capture some footage on the E2P internal memory and compare it ?

Actually, I will conduct a few tests using different video size...after storm ETA leave my area. I'm just worry that the problem isn't the card and something in the Drone transfer rate.

Rubik3x · Nov 14, 2020

Ram said:
I disagree. UHS 3 exists.

UHS Speed Class was introduced in 2009 by the SD Association and is designed for SDHC and SDXC memory cards. UHS utilizes a new data bus that will not work in non-UHS host devices. If you use a UHS memory card in a non-UHS host, it will default to the standard data bus and use the "Speed Class" rating instead of the "UHS Speed Class" rating. UHS memory cards have a full higher potential of recording real time broadcasts, capturing large-size HD videos and extremely high quality professional HD.

UHS Class
Minimum Speed
1
10MB/s
3
30MB/s

I'm wondering if the 100 Mbs of the video transfer of the E2P is too much for write a 30Mb/s of the card... By the way, I don't have this problem with the Mavic 2 Pro at 4K and the Mavic Mini at 2.7K.

Don't confuse Bytes and bits; MB/s and Mb/s (Mbs). 30 MB/s is 240 Mb/s. 8 bits per Byte. UHS-3 should be more than adequate for the 120 Mb/s output from the E2P.

Ram · Nov 16, 2020

Rubik3x said:
Don't confuse Bytes and bits; MB/s and Mb/s (Mbs). 30 MB/s is 240 Mb/s. 8 bits per Byte. UHS-3 should be more than adequate for the 120 Mb/s output from the E2P.

Thanks for the comments and the info. Now, when I shoot at 1080 at any fps rate, the video comes perfect. I guess I need to buy a better SD than the Scandisk Extreme (U-3) I have. I will try that.

rcee · Nov 17, 2020

I use the sandisk extreme pro 128 gb. Runs smooth even in 6K. Make sure if u buy a scandisk to go 128GB or more as those cards are faster then variants below 128 gb, You can verify this on their webs.