Size of SER and ADV file
Posted: Sat Nov 25, 2023 12:35 pm
Hello,
I'm doing some tests with several cameras and SharpCap.
I check if my EAGLE computer can save 3 films from 3 cameras with 3 instances of SharpCap at the same time ... It works.
I will find the best combination between intern drive and extern drive or both.
But I note now a big difference on the size of the ADV and SER files.
I capture a film with 1 minute with a QHY200M camera.
The file is ~ 2.8 GByte with SER and ~ 0.8 GByte with ADV. What ? ~2 GB difference !
Is that expected ? ... and why ? ... Is the ADV format compressed ?
Or other reason ... SER save the camera pixels on 16 bit, but ADV only with the real bit depth, and with the QHY200 then in 12 bit.
Concerning the compression ... it is very strange, while the camera is in the dark (with cover) mean I take 20 ms in the dark ... = offset.
OK, fast only noise on the images ... it could be better "compress" if the pixels are saved on only the maximum value per image.
I have no idea if the ADV format use this for smaller file size.
Any idea ?
Regards,
Jean-Francois
I'm doing some tests with several cameras and SharpCap.
I check if my EAGLE computer can save 3 films from 3 cameras with 3 instances of SharpCap at the same time ... It works.
I will find the best combination between intern drive and extern drive or both.
But I note now a big difference on the size of the ADV and SER files.
I capture a film with 1 minute with a QHY200M camera.
The file is ~ 2.8 GByte with SER and ~ 0.8 GByte with ADV. What ? ~2 GB difference !
Is that expected ? ... and why ? ... Is the ADV format compressed ?
Or other reason ... SER save the camera pixels on 16 bit, but ADV only with the real bit depth, and with the QHY200 then in 12 bit.
Concerning the compression ... it is very strange, while the camera is in the dark (with cover) mean I take 20 ms in the dark ... = offset.
OK, fast only noise on the images ... it could be better "compress" if the pixels are saved on only the maximum value per image.
I have no idea if the ADV format use this for smaller file size.
Any idea ?
Regards,
Jean-Francois