Shutter angle in G0Pro 13 not working right

[DTL77]

This concerns the use of EXPT. It does not work correctly for GoPro 13 at 24fps and all at 360.

Angle Target GP13-24fps GP10/11-24 fps Target GP13-30 fps GP10/11-30 fps
360 1/24 1/60 1/49 1/30 1/61 1/61
180 1/48 1/60 1/49 1/60 1/61 1/61
90 1/96 1/120 1/97 1/120 1/121 1/122
45 1/192 1/194 1/194 1/240 1/242 1/243

[dnewman-gpsw]

Sorry, I don't follow you notation. What are the different columns?

[DTL77]

Sorry, I don't follow you notation. What are the different columns?

Sorry the spacing got messed up. I had them in proper columns. So the first vertical set of numbers are the angles, the second what that represents for 24fps then values for GP13 and GP10/11 then target for 30fps and values for GP13 and then GP10/11. So for example at 90 the value for 24 should be 1/96 but GP13 is 1/194 while the GP10/11 are close at 1/97. This help?

[dnewman-gpsw]

I think there confusion over what EXPT does. It doesn't set a fixed shutter angle, it sets a maximum shutter angle so it will still depend on light. Are you covering the lens to try and simulate what the maximum could be?

[DTL77]

Yes that is exactly what I did and rechecked many times before sending in the data. David T. Long Professor Emeritus & Adjunct Professor Aqueous & Environmental Geochemistry Dept. of Earth and Environmental Sciences 288 Farm Lane, Rm 207 Michigan State University East Lansing, Michigan 48824 my office: 517.353.9618 dept office: 517.355.4626 email: ***@***.*** [cid:a70e7d48-716f-44df-a520-e02ed96d11b5] Michigan State University occupies the ancestral, traditional, and contemporary Lands of the Anishinaabeg–Three Fires Confederacy of Ojibwe, Odawa, and Potawatomi peoples. The University resides on Land ceded in the 1819 Treaty of Saginaw. Sometimes you win, sometimes you lose, sometimes it rains. (Bull Durham, 1988) Spartan Strong

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________________________________ From: David Newman ***@***.***> Sent: Wednesday, December 4, 2024 3:56 PM To: gopro/labs ***@***.***> Cc: Long, David ***@***.***>; Author ***@***.***> Subject: Re: [gopro/labs] Shutter angle in G0Pro 13 not working right (Issue #1196) I think there confusion over what EXPT does. It doesn't set a fixed shutter angle, it sets a maximum shutter angle so it will still depend on light. Are you covering the lens to try and simulate what the maximum could be? — Reply to this email directly, view it on GitHub<https://urldefense.com/v3/__https://github.com/gopro/labs/issues/1196*issuecomment-2518542229__;Iw!!HXCxUKc!3w-vwI4q6jr6N04dTnCBOuFIwlkF9gDftz722JnJ31NjWDop9XwnrV9mMFPvuv2ko8yDqIX2aT1AAVPXepQW$>, or unsubscribe<https://urldefense.com/v3/__https://github.com/notifications/unsubscribe-auth/BMA24MKJYGWT6AXHFZRAY5L2D5T6RAVCNFSM6AAAAABTAY6QJ2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKMJYGU2DEMRSHE__;!!HXCxUKc!3w-vwI4q6jr6N04dTnCBOuFIwlkF9gDftz722JnJ31NjWDop9XwnrV9mMFPvuv2ko8yDqIX2aT1AAbYgqk34$>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[dnewman-gpsw]

This is a very old feature, before the cameras had GYRO compensated hypersmooth. It was added to assist users reduce the amount of motion blur in hypersmooth low light situations. The gyro comp does that automatically now. You can disable that with $GCMP=1.

[DTL77]

Interesting are you saying that GP13 will stabilize in low light. I have not noticed but will give it a try. Probably the same issue but one of the reasons I was using this was the situation in which in low light conditions at too low of a shutter speed, points of light flicker as one walked (e.g., POV at night in a city). I solved that by turning off hype smooth and setting a speed limit so that would not happen. Then I used Player to stabilize. However, for some reason Player lowers the bit rate (I set to 190, Player knocks it down to < 50) so started using GyroFlow. Bummer because I prefer Player. Am I off track? David T. Long Professor Emeritus & Adjunct Professor Aqueous & Environmental Geochemistry Dept. of Earth and Environmental Sciences 288 Farm Lane, Rm 207 Michigan State University East Lansing, Michigan 48824 my office: 517.353.9618 dept office: 517.355.4626 email: ***@***.*** [cid:d70bd4ab-a1de-480f-acfc-6f3b39686cb2] Michigan State University occupies the ancestral, traditional, and contemporary Lands of the Anishinaabeg–Three Fires Confederacy of Ojibwe, Odawa, and Potawatomi peoples. The University resides on Land ceded in the 1819 Treaty of Saginaw. Sometimes you win, sometimes you lose, sometimes it rains. (Bull Durham, 1988) Spartan Strong

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________________________________ From: David Newman ***@***.***> Sent: Wednesday, December 4, 2024 3:59 PM To: gopro/labs ***@***.***> Cc: Long, David ***@***.***>; Author ***@***.***> Subject: Re: [gopro/labs] Shutter angle in G0Pro 13 not working right (Issue #1196) This is a very old feature, before the cameras had GYRO compensated hypersmooth. It was added to assist users reduce the amount of motion blur in hypersmooth low light situations. The gyro comp does that automatically now. You can disable that with $GCMP=1. — Reply to this email directly, view it on GitHub<https://urldefense.com/v3/__https://github.com/gopro/labs/issues/1196*issuecomment-2518547708__;Iw!!HXCxUKc!3RlchhbCe9Q-wVNvKqbbLS4CfK2b64jDP8zJ046d3MnMHL-hI-WX8_3F2kAf21b4TAroyY0UHxN6meXvttm5$>, or unsubscribe<https://urldefense.com/v3/__https://github.com/notifications/unsubscribe-auth/BMA24MN6AI2YSKYHTARR35L2D5ULRAVCNFSM6AAAAABTAY6QJ2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKMJYGU2DONZQHA__;!!HXCxUKc!3RlchhbCe9Q-wVNvKqbbLS4CfK2b64jDP8zJ046d3MnMHL-hI-WX8_3F2kAf21b4TAroyY0UHxN6mXxz45gR$>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[DTL77]

Also my 11 did not work in low light conditions until I set the minimum shutter speed. David T. Long Professor Emeritus & Adjunct Professor Aqueous & Environmental Geochemistry Dept. of Earth and Environmental Sciences 288 Farm Lane, Rm 207 Michigan State University East Lansing, Michigan 48824 my office: 517.353.9618 dept office: 517.355.4626 email: ***@***.*** [cid:1d060945-6818-471a-a7af-46c35ee902df] Michigan State University occupies the ancestral, traditional, and contemporary Lands of the Anishinaabeg–Three Fires Confederacy of Ojibwe, Odawa, and Potawatomi peoples. The University resides on Land ceded in the 1819 Treaty of Saginaw. Sometimes you win, sometimes you lose, sometimes it rains. (Bull Durham, 1988) Spartan Strong

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________________________________ From: David Newman ***@***.***> Sent: Wednesday, December 4, 2024 3:59 PM To: gopro/labs ***@***.***> Cc: Long, David ***@***.***>; Author ***@***.***> Subject: Re: [gopro/labs] Shutter angle in G0Pro 13 not working right (Issue #1196) This is a very old feature, before the cameras had GYRO compensated hypersmooth. It was added to assist users reduce the amount of motion blur in hypersmooth low light situations. The gyro comp does that automatically now. You can disable that with $GCMP=1. — Reply to this email directly, view it on GitHub<https://urldefense.com/v3/__https://github.com/gopro/labs/issues/1196*issuecomment-2518547708__;Iw!!HXCxUKc!3RlchhbCe9Q-wVNvKqbbLS4CfK2b64jDP8zJ046d3MnMHL-hI-WX8_3F2kAf21b4TAroyY0UHxN6meXvttm5$>, or unsubscribe<https://urldefense.com/v3/__https://github.com/notifications/unsubscribe-auth/BMA24MN6AI2YSKYHTARR35L2D5ULRAVCNFSM6AAAAABTAY6QJ2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKMJYGU2DONZQHA__;!!HXCxUKc!3RlchhbCe9Q-wVNvKqbbLS4CfK2b64jDP8zJ046d3MnMHL-hI-WX8_3F2kAf21b4TAroyY0UHxN6mXxz45gR$>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[dnewman-gpsw]

I will test when back at the office.

[DTL77]

Great )

[dnewman-gpsw]

Yes it "sort of" a bug in HERO13. HERO11 and 12 only seems to go to 180°, no 360° any more (really bad for HS.) It is likely by design on HERO13, although I don't like it either. Seems they are using 30 or 25fps sensor timing for 24 modes. This means that only have to tune the camera for the PAL/NTSC, not independently for 24fps modes. If you scan p25!1Np24, this will switch the camera to PAL timing, and now 24p uses 1/50 (likely proving my tuning theory.) Labs is still doing the correct thing, but is a lower level that is flawed. I will file a report internally.

[DTL77]

Thanks David! Always something 🙂. dave David T. Long Professor Emeritus & Adjunct Professor Aqueous & Environmental Geochemistry Dept. of Earth and Environmental Sciences 288 Farm Lane, Rm 207 Michigan State University East Lansing, Michigan 48824 my office: 517.353.9618 dept office: 517.355.4626 email: ***@***.*** [cid:ea1a3724-3230-4f47-a4f9-8af58440554d] Michigan State University occupies the ancestral, traditional, and contemporary Lands of the Anishinaabeg–Three Fires Confederacy of Ojibwe, Odawa, and Potawatomi peoples. The University resides on Land ceded in the 1819 Treaty of Saginaw. Sometimes you win, sometimes you lose, sometimes it rains. (Bull Durham, 1988) Spartan Strong

…

________________________________ From: David Newman ***@***.***> Sent: Wednesday, December 4, 2024 5:10 PM To: gopro/labs ***@***.***> Cc: Long, David ***@***.***>; Author ***@***.***> Subject: Re: [gopro/labs] Shutter angle in G0Pro 13 not working right (Issue #1196) Yes it "sort of" a bug in HERO13. HERO11 and 12 only seems to go to 180°, no 360° any more (really bad for HS.) It is likely by design on HERO13, although I don't like it either. Seems they are using 30 or 25fps sensor timing for 24 modes. This means that only have to tune the camera for the PAL/NTSC, not independently for 24fps modes. If you scan p25!1Np24, this will switch the camera to PAL timing, and now 24p uses 1/50 (likely proving my tuning theory.) Labs is still doing the correct thing, but is a lower level that is flawed. I will file a report internally. — Reply to this email directly, view it on GitHub<https://urldefense.com/v3/__https://github.com/gopro/labs/issues/1196*issuecomment-2518662683__;Iw!!HXCxUKc!xucB8IC581Y-I9bbqrpQY5yLhtw8dm5pcAj0gAWfXApqKn6DIAyl0qCFRAvqXf18SJi9ApT0Jz2JmSu62Xh0$>, or unsubscribe<https://urldefense.com/v3/__https://github.com/notifications/unsubscribe-auth/BMA24MJVDBST2QNDRK6YN7T2D54VNAVCNFSM6AAAAABTAY6QJ2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKMJYGY3DENRYGM__;!!HXCxUKc!xucB8IC581Y-I9bbqrpQY5yLhtw8dm5pcAj0gAWfXApqKn6DIAyl0qCFRAvqXf18SJi9ApT0Jz2JmZnpCtuj$>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[DTL77]

PS in terms of my testing the 11 worked fine, except for the 360.

[DTL77]

sorry I meant the 10 for my most recent tests

[DTL77]

Hi David, sorry to bother. I guess gyro stabilization is essentially HyperSmooth from what I learned. In my experience (GP 11, 13; also have the 9 & 10, did not get the 12) stabilization did not work well in low light. I did not want to use a gimbal for POV videos (e.g., city streets) and learned about the influence of shutter speed in stabilization. Thus, setting the shutter angle via Labs came into play (I have been a Labs user almost since my first GoPro, it is great and Labs sets GoPro, INMO, above the rest). I had just done a trip to Chicago with the 13 and had been using the 45 degree angle, which is recommended. Works ok but of course it is still a bit dark (I also turn Noise Reduction of via Labs). Back home I thought why not try 90 degrees and that is when I recognized the issue, instead of 1/96 it was 1/120. 180 was off also which is too bad for the 180 rule. Now this is for 24 as 30 is fine. Anyway I though I would explain where I was coming from. I am going to try what you outlined. If you are correct, from what I see I think you are correct, it is strange that GP is using 30 or 25fps sensor timing for 24 modes. I think because 45 is recommended that others who use this approach would not notice the issue. Hope this can get resolved. Somehow I don't see it happening tomorrow, since it is not a Lab issue. Thanks for your insights, Dave. PS if you ever need a Beta Tester, count me in :).