# Writing to SD card faster FPS

**URL:** <https://forums.openmv.io/t/writing-to-sd-card-faster-fps/1964>\
**Category:** OpenMV Boards\
**Created:** [October 14, 2020, 8:58pm UTC](https://forums.openmv.io/t/writing-to-sd-card-faster-fps/1964 "2020-10-14T20:58:50Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![shaikalthaf4](https://avatars.discourse-cdn.com/v4/letter/s/71c47a/32.png) [@shaikalthaf4](https://forums.openmv.io/u/shaikalthaf4)\
**Post date:** [October 14, 2020, 8:58pm UTC](https://forums.openmv.io/t/writing-to-sd-card-faster-fps/1964/1 "2020-10-14T20:58:50Z")

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Hi,

I’m using the H7 plus and following the “image\_writer” example to save raw file to sd card. Is there anyway to increase write speed at full resolution ( at least VGA) to increase the FPS achieved ? Due to the high pixel-resolution requirements in my use case I cannot do binning and would like to retain best resolution possible ( at least VGA when using OV7725). Currently, only by windowing to around 256x256 I’m getting close to 30 FPS. When doing VGA (full-resolution ) it drops to 20 FPS. Even though, the typical FPS with H7 plus and OV7725 on simple “helloworld” I get is 60 FPS.

Is there any workaround to increase the FPS for writing to sd card in VGA resolution? It would be a great feature to have this.

I was thinking on-the lines of possibility of using Interrupts to write to sd-card, by saving stream buffer in RAM and subsequently clearing buffer and again writing to sd-card with Interrupts, to get constant (stable) and high-fps .

Thanks,

-Althaf

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**Author:** ![kwagyeman](https://yyz1.discourse-cdn.com/flex029/user_avatar/forums.openmv.io/kwagyeman/32/4_2.png) [@kwagyeman](https://forums.openmv.io/u/kwagyeman)\
**Post date:** [October 14, 2020, 10:10pm UTC](https://forums.openmv.io/t/writing-to-sd-card-faster-fps/1964/2 "2020-10-14T22:10:34Z")

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It’s just requires us to implement double buffering support. I will have this feature in before the end of the year. However, I have to get a new screen interface working before to enable the H7 to drive monitors.

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**Author:** ![shaikalthaf4](https://avatars.discourse-cdn.com/v4/letter/s/71c47a/32.png) [@shaikalthaf4](https://forums.openmv.io/u/shaikalthaf4)\
**Post date:** [December 10, 2020, 4:00am UTC](https://forums.openmv.io/t/writing-to-sd-card-faster-fps/1964/3 "2020-12-10T04:00:34Z")

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Hi Nyamekye,

As a follow-up to my previous question, can we expect the improved FPS and more stable “image\_writer” write speed to **sd-card** support feature to roll-out soon ? I’m really looking for forward to it and in need of this feature.

Thnaks!

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**Author:** ![kwagyeman](https://yyz1.discourse-cdn.com/flex029/user_avatar/forums.openmv.io/kwagyeman/32/4_2.png) [@kwagyeman](https://forums.openmv.io/u/kwagyeman)\
**Post date:** [December 10, 2020, 7:16pm UTC](https://forums.openmv.io/t/writing-to-sd-card-faster-fps/1964/4 "2020-12-10T19:16:22Z")

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I have to update the FIR driver subsystem for the OpenMV Cam Pure Thermal. Once I finish that I will work on adding triple/many buffer support for the camera. This will finally let everyone do smooth video record and make the system run faster at maximum processor utilization.

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**Author:** ![shaikalthaf4](https://avatars.discourse-cdn.com/v4/letter/s/71c47a/32.png) [@shaikalthaf4](https://forums.openmv.io/u/shaikalthaf4)\
**Post date:** [December 10, 2020, 7:52pm UTC](https://forums.openmv.io/t/writing-to-sd-card-faster-fps/1964/5 "2020-12-10T19:52:39Z")

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Great, Thanks a lot for your continuous support !