480p and 1080p video appear to use the same bitrate

I can confirm similar results recorded on Krilin:

1080p:
1920x1080
31fps
6617kbps
8.7mb filesize

480p:
640x480
31 fps
6452kbps
8.3mb filesize

@jamesh
What would you recommend for the settings at the lower resolution? What bitrate would be expected?

I checked what Android does in their camera application.
Basically they seem to use an average bitrate of 12kbps in 1080p, 8kbps in 720p and 5kbps in 480p.
We agreed that we would try to do the same.

However, once I pass the correct bitrate setting down the stack from qtubuntu-camera, it seems that at some point that setting gets lost or ignored.

Jim Hodapp is looking into why this happens, since he's working on that part of the stack. So far it seems that the settings is making its way down to the level of the media framework, and he is looking to find if it gets passed to the video codec properly.

Bug #1526407 tracks the problem above in libhybris (and down into the android framework)

And the bitrates mentioned above are in MBps, not kbps.

Status changed to 'Confirmed' because the bug affects multiple users.

Its rather important when you set the video-param-encoding-bitrate parameter for the encoder. The code should look like

android_recorder_setParameter(recorder, "video-param-encoding-bitrate=2048");
...
android_recorder_prepare(recorder);
android_recorder_start(recorder);

The parameters are not applied if you set the parameter after you've called android_recorder_prepare

Can someone please verify we're doing it this way?

Hi Simon,

I have just checked in qtubuntu-camera and it is indeed done this way.

not much activity on this one lately