Dahua Vari-focal Bullet timed jpeg upload has heavy jpeg artefacts

[ipgem]

Hello all

I have a Dahua IPC-HFW5241E (2MP IR Vari-focal Bullet WizMind Network Camera)

There is a setting on the interface called "picture", where we can set a timed snapshot image. It uploads a timed jpeg to my server, and despite setting the quality to 6 (highest) the image has heavy jpeg artefacts.

When i grab an image from the h265 stream, the jpeg is fantastic. When I SFTP upload a timed jpeg through the setting, it looks like it is saved at quality 50%, and the size of the image matches a quality 50% export. Is there any way I can improve this

Thank you in advance to anyone who can help

 

[bigredfish]

I seem to recall someone else saying similar a few months back. I'm thinking its pulling those snapshots from the substream...?

 

[ipgem]

I seem to recall someone else saying similar a few months back. I'm thinking its pulling those snapshots from the substream...?

Thanks, I'll have a go at turning the substream off, see if that makes a difference