I mentioned in prior posts that my camera is pointed about 3-5 degrees to the right and that my first video test, done inside in low light, had a strange artifact, but I wanted to do some actual flying outdoor to see how this thing is working and found some other things that are troubling. I'll put up a video either latter today or tomorrow, but for now let me list the issues and give some detail.
1. Camera is pointed 3-5 degrees to the right and IMU and gimbal calibration do not fix it.
2. Strange diagonal washing effect from top left to bottom right that resets every second, every 30 frames. I recorded at UHD 30fps and using D-log and H.265 with ISO1600 due to low light. Due to the low light indoors I wasn't expecting much but the diagonal washing effect that resets every 30 frames suggest some problem with either the dynamic range compression of D-log or the bitrate compression into H.265. The diagonal wash almost looks like a sheet of dirty glass is being pulled across the sensor diagonally.
3. I was able to make one outdoor flight today lasting about 18.5 minutes but when I tried to launch for the second flight the camera/gimbal would not complete the power on homing sequence. That is, the gimbal, instead of homing in about 5-10 seconds would not stop and continued tilting all the way up and all the way down for several minutes -- I powered off the drone to end the homing. I repowered the drone but same problem. I then shut everything down, the drone, the RC and the app then powered everything back on and still the same problem. OK, that cut short my trips so I packed up and went home. Once home I tried powering on again and this time the gimbal completed the homing sequence normally.
4. I downloaded the video I shot with my one and only flight today and the video is weird. First, I once again used H.265 and D-log but with outdoor lighting I was at ISO100, f/7.1 and a shutter speed of about 1/200. The histogram looked good with no clipping at either end. But, when viewing the video in PP on the Lumetri Scopes something really weird is going on. First, the sky to the right in the direction of the Sun is totally blown out but the max value I see in Lumetri is about 75IRE -- no where near the 100 clipping point. The black values are no lower than 13IRE with the bulk starting at more like 25IRE. So, from the Lumetri scopes the video looks like it should be just fine and is in agreement with the histogram I was while flying, but the sky is totally blown out.
5. In the shadow detail, most noticeable towards the end of the flight, I see a flickering effect not unlike the one I see in the shadow detail with my Inspire 1 Pro. And, like issue #2, the flickering is every second or every 30 frames. Additionally, I see a hint of the washing effect also from #2.
6. I had numerous FPV glitches on the screen with video drop outs and other artifacts -- I never went more than a quarter mile and had no obstructions between the RC and bird.
7. Towards the end of the video I see a 5 second portion of the video where the camera looks like it develops epilepsy with fast jumping side to side. When I single step the frames it gets even weirder -- it looks kind of like the video is jumping between the current point and the beginning of the video before take off. I will look at this closer as this may be weirdness with PP and not the fault of the P4P.
Again, I'll try to upload a video either latter tonight or tomorrow and will post a link here.
Sucks!
Brian
1. Camera is pointed 3-5 degrees to the right and IMU and gimbal calibration do not fix it.
2. Strange diagonal washing effect from top left to bottom right that resets every second, every 30 frames. I recorded at UHD 30fps and using D-log and H.265 with ISO1600 due to low light. Due to the low light indoors I wasn't expecting much but the diagonal washing effect that resets every 30 frames suggest some problem with either the dynamic range compression of D-log or the bitrate compression into H.265. The diagonal wash almost looks like a sheet of dirty glass is being pulled across the sensor diagonally.
3. I was able to make one outdoor flight today lasting about 18.5 minutes but when I tried to launch for the second flight the camera/gimbal would not complete the power on homing sequence. That is, the gimbal, instead of homing in about 5-10 seconds would not stop and continued tilting all the way up and all the way down for several minutes -- I powered off the drone to end the homing. I repowered the drone but same problem. I then shut everything down, the drone, the RC and the app then powered everything back on and still the same problem. OK, that cut short my trips so I packed up and went home. Once home I tried powering on again and this time the gimbal completed the homing sequence normally.
4. I downloaded the video I shot with my one and only flight today and the video is weird. First, I once again used H.265 and D-log but with outdoor lighting I was at ISO100, f/7.1 and a shutter speed of about 1/200. The histogram looked good with no clipping at either end. But, when viewing the video in PP on the Lumetri Scopes something really weird is going on. First, the sky to the right in the direction of the Sun is totally blown out but the max value I see in Lumetri is about 75IRE -- no where near the 100 clipping point. The black values are no lower than 13IRE with the bulk starting at more like 25IRE. So, from the Lumetri scopes the video looks like it should be just fine and is in agreement with the histogram I was while flying, but the sky is totally blown out.
5. In the shadow detail, most noticeable towards the end of the flight, I see a flickering effect not unlike the one I see in the shadow detail with my Inspire 1 Pro. And, like issue #2, the flickering is every second or every 30 frames. Additionally, I see a hint of the washing effect also from #2.
6. I had numerous FPV glitches on the screen with video drop outs and other artifacts -- I never went more than a quarter mile and had no obstructions between the RC and bird.
7. Towards the end of the video I see a 5 second portion of the video where the camera looks like it develops epilepsy with fast jumping side to side. When I single step the frames it gets even weirder -- it looks kind of like the video is jumping between the current point and the beginning of the video before take off. I will look at this closer as this may be weirdness with PP and not the fault of the P4P.
Again, I'll try to upload a video either latter tonight or tomorrow and will post a link here.
Sucks!
Brian