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OpenThermal / libseek-thermal

SEEK thermal compact camera driver supporting the thermal Compact, thermal CompactXR and and thermal CompactPRO
MIT License
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frames missing #37

Closed ptenax closed 3 years ago

ptenax commented 5 years ago

Hi Maarten,

Thanks very much for this library, I have managed to install and run a SEEK Pro on a Raspberry Pi 3B. I am having an issue with missing frames. I use timeout to automatically stop a recording and save a file after a set number of seconds, e.g. 20 seconds. But I always get less than the total duration and total frames expected (as viewed in the Windows software MPC-HC; also VLC). For example:

#This gives me 12 seconds of playback and 119 frames
timeout 20 seek_viewer --fps=10 --camtype=seekpro --colormap=1 --rotate=90 --scale=1 --output=/home/pi/test10fps.avi  

#This gives me 5 seconds of playback and 124 frames
timeout 20 seek_viewer --fps=25 --camtype=seekpro --colormap=1 --rotate=90 --scale=1 --output=/home/pi/test25fps.avi

In both cases I used a stopwatch to time the actual recording time, which was indeed 20 seconds. The internal refresh click on the camera happened several times in each recording. I am planning to record for sequential 15 minute blocks in my intended application. I would really like a minimum of 25fps if I can get it.

Advice would be very much appreciated, Kyle

maartenvds commented 5 years ago

Hi, you will never get 25 fps. These thermal cameras are designed for max 9fps. In practice, you can get a little more, but always less than 20 fps. Also the higher you go, the more instable the framerate will become. My advice, record below 9 fps.

ptenax commented 5 years ago

Thanks so much Maarten, and again for your great library.

Regards,

Kyle

On Tue, 9 Jul 2019 at 20:07, Maarten Vandersteegen notifications@github.com wrote:

Hi, you will never get 25 fps. These thermal cameras are designed for max 9fps. In practice, you can get a little more, but always less than 20 fps. Also the higher you go, the more instable the framerate will become. My advice, record below 9 fps.

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