Also JPG analysing shows no differences on r4160 between both runs.
As I mentioned before, philmoz change in r4153
only changes what CHDK thinks the black level is. It doesn't change the camera behavior at all. I am very sure of this.
For isoinc, the only effect will be the meter96 value, because black level is part of the raw_to_ev96 calculation. It would also change the black level recorded in CHDK DNG files, if you have them enabled. That's all. For the rawopint script, the script is broken when the black level changes, because it has many calculations that depend on the value that aren't aware of the change.
We need to understand the actual camera behavior. To avoid confusion due to the black level change, we can look at the meter column. This is the average of the raw frame buffer value, without converting into APEX96
In the isoinc_r4160.csv from reply 10, in the first (non-continuous) run we see going from sv96 = 571 to 572, the meter value jumps from 789 to 2327. The "meter96" value doesn't jump, because this build is aware of the blacklevel change. In the second run (in continuous mode), there was no jump in the meter value.
In the isoinc.csv from reply 12, we see exactly the same behavior. The only difference is in the meter96 value, which jumps because it is not aware of the blacklevel change.
From this data, it looks like the black level change does not happen in continuous mode.
In the "JPEG analyzing" (isoinc_r4160_JPG.png, isoinc_r4138_JPG.png ), is it correct the Y axis is showing the brightness of the jpeg? Or something else?
The difference in jpeg EXIF ISO between continuous and not may be a clue, but I'm not sure what it means yet.
One thing I'd like to see is if we get the same behavior using individual shots, releasing half press between each. I'll post a version of isoinc that supports this later.
Philmoz noted a difference between script and override menu
http://chdk.setepontos.com/index.php?topic=11081.msg121670#msg121670. These should be identical if the script override is set before starting halfpress, but in rawopint and the current isoinc, the override is set in inside the shooting process.
