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LJMUAstroecology / flirpy

Python library to interact with FLIR camera cores
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Frame width varying with the TeaxGabber and Tau2 #56

Open Ghipag opened 2 years ago

Ghipag commented 2 years ago

When using the grab function we were originally getting timeout errors. We found that the _read() function takes a long time (~0.6s) and so we changed the timeout threshold to a very large 1.5s.

We then started getting frame width errors, where varying frame widths eg.(1203, 969, 52646, 1284) were found by the _convert_frame() funciton when we repeatedly tried to grab images.

Do you have any idea why this might be happening? Why it takes so long for the data to be read? The only thing we can think of is a slow USB connection. We're talking to the grabber through linux on an oracle virtual machine with USB 3.0 FYI

Thanks in advance

jveitchmichaelis commented 2 years ago

Hi Louis, the Grabber is not USB 3 capable, unless it's been updated - so it's unlikely that will make things any faster. You can try the official libraries if you like, that would at least determine if flirpy is the cause of the slowdown. I suspect it's because our driver implementation is not particularly efficient, but with the camera I tested with it wasn't that slow!

On Fri, Aug 27, 2021 at 12:52 PM Louis Timperley @.***> wrote:

When using the grab function we were originally getting timeout errors. We found that the _read() function takes a long time (~0.6s) and so we changed the timeout threshold to a very large 1.5s.

We then started getting frame width errors, where varying frame widths eg.(1203, 969, 52646, 1284) were found by the _convert_frame() funciton when we repeatedly tried to grab images.

Do you have any idea why this might be happening? Why it takes so long for the data to be read? The only thing we can think of is a slow USB connection. We're talking to the grabber through linux on an oracle virtual machine with USB 3.0 FYI

Thanks in advance

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