Video Assist Frame dropped while recording

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Jong Uy

  • Posts: 6
  • Joined: Thu Oct 13, 2016 4:22 am

Video Assist Frame dropped while recording

PostFri Oct 13, 2017 10:37 pm

Hi, was able to experienced frames droppin while recordig with the video Assist, when played back, the video lagged or sometimes jumps. What seems to be the culprit? Sdi cards used? What is the appropriate one?

Thank you
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Xtreemtec

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  • Joined: Wed Jan 02, 2013 11:48 am
  • Location: The Netherlands

Re: Video Assist Frame dropped while recording

PostSat Oct 14, 2017 4:09 pm

From the support section on the website..
What SD card should I use with the Blackmagic Video Assist?
It is important to use high speed UHS-1 SD cards. These are some SD cards which we have tested using ProRes HQ.

The following SD cards will record at a maximum of 1080p60 and are recommended when using HFS+ or exFAT:

SanDisk Extreme Pro 16GB SDSDXP-016G-A46
SanDisk Extreme Pro 32GB SDSDXP-032G-A46
SanDisk Extreme Pro 64GB SDSDXP-064G-A46
SanDisk Extreme Pro 128GB SDSDXP-128G-A46
SanDisk Extreme Pro 256GB SDSDXP-256G-A46
SanDisk Extreme Pro 512GB SDSDXP-512G-A46
The following SD cards will record at a maximum of 1080i60 using HFS+ or exFAT:

Lexar Professional SD XC 600x 128GB
DelkinDevices 633x 8GB
The following SD cards will record at a maximum of NTSC using HFS+ or exFAT:

SanDisk Ultra SD HC 8GB
SanDisk SD HC 8GB
Transcend SD HC 8GB
The following SD cards are discontinued and are not recommended for recording on Blackmagic Video Assist:

Panasonic SDHC Gold Series 16GB
Panasonic SDHC Gold Series 32GB
Important Notes About SD Card Speed

Please ensure your chosen SD card is UHS-1 only. The above list are the SD cards we have currently tested, however there are many other available SD cards which will be compatible. It’s worth testing your card’s speed using Blackmagic Disk Speed Test to accurately measure whether your SD card will be able to record at the rate you require. Blackmagic Disk Speed Test uses data to simulate the storage of video so you can get results similar to what you’ll see when capturing video to an SD card.
Daniel Wittenaar .:: Xtreemtec Media Productions ::. -= www.xtreemtec.nl =-
4K OBV, ATEM TVS HD, Production Studio 4K, 2M/E Broadcast Studio 4K, Hyperdeck Studio, SONY FS7 4K, JVC HM700 Full HD Camera
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Jong Uy

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  • Joined: Thu Oct 13, 2016 4:22 am

Re: Video Assist Frame dropped while recording

PostWed Oct 18, 2017 12:03 pm

Hi Thank You so much for this.
I did use the Sandisk Extreme Pro 32 gb and it worked well.

However, i have experienced another problem, when i updated the firmware, it suddenly back to where it belongs, same problem - dropped frames, slow motion on the videos and the audio-video is terribly out of sync, what seems to be the problem? I even formatted the Sandisk Extreme Pro again, i tried all codec, same result.

Please help

Thank you

Jong
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Howard Roll

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Re: Video Assist Frame dropped while recording

PostWed Oct 18, 2017 9:07 pm

I've used the 32, 64, 128, & 256 GB versions of the Sandisk card and have only ever experienced dropped frames (repeatedly) with the 32GB version. I would not trust it, even though it's on the supported list.

Good Luck
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Denny Smith

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  • Joined: Thu Aug 01, 2013 4:19 pm
  • Location: USA, Northern Calif.

Re: Video Assist Frame dropped while recording

PostWed Oct 18, 2017 9:42 pm

The 32GB card drops frames, even in the Picket camera. The 64 pans 128GB cards work best.
Cheers
Denny Smith
SHA Productions

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