Can't set "Maximum Bitrate" beyond 10MB on Raspberry Pi3B+

[lida2003]

if I set Maximum Bitrate more than 10Mbps, such as 11Mbps. It will not take effect and blank the web page.

It'll be useful for high rate settings, as 720P@10Hz takes roughly about 7~8Mbps.

Tried gpu_mem=196, no luck!

[stephendade]

That's deliberate - I'd set the max allowable bitrate to 10Mbps. I've now upped this to 60Mbps. Fixed in #193.

[lida2003]

Just git pull. Got below result:

50M/30M/25M ==> VLC can't work 10M/20M ==> VLC works

Should I re-install(deploy) from the source?

[stephendade]

50M/30M/25M ==> VLC can't work 10M/20M ==> VLC works

Yep, that's expected. The x264 hardware encoder on the Pi can do a maximum of 20Mbps.

The encoder is level 4 compliant, and according to https://blog.mediacoderhq.com/h264-profiles-and-levels/, that equates to 20Mbps.

EDIT: Is there any particular reason you need these high bitrates? At this sort of level, I'd be recommending an Nvidia Jetson or similar.

[lida2003]

The encoder is level 4 compliant, and according to https://blog.mediacoderhq.com/h264-profiles-and-levels/, that equates to 20Mbps.

Video: Limit bitrate to 20Mbps

I checked link, it seems level 4 can run over 20Mbps when in different profiles. Please correct me if I'm wrong.

Is there any particular reason you need these high bitrates? At this sort of level, I'd be recommending an Nvidia Jetson or similar.

Just test with higher fps rate. I'm trying to install this on my copter.

[stephendade]

In #195 I've updated to using the "high" profile, allowing for up to 50Mbps. Tested on a 3b+ and works well.

Note that the "bitrate" setting in the web GUI is a maximum number. The actual bitrate depends alot on the movement in the frame.

[lida2003]

In #195 I've updated to using the "high" profile, allowing for up to 50Mbps. Tested on a 3b+ and works well.

I would be nice to have 50Mbps.

[stephendade]

I would be nice to have 50Mbps.

I meant "up to and including 50Mbps"