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zantarob

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re photogrammetery, word on the street is every 10 degrees should be sufficient at a distance that keeps object of interest nearly filling the screen.
 

volate!lo

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problem is Tello doesn't react well to speeds below 10% so this AP wold be the only option but not really trivial...
Number of photos per circle doesn't matter though
 

zantarob

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problem is Tello doesn't react well to speeds below 10% so this AP wold be the only option but not really trivial...
Number of photos per circle doesn't matter though
If such a mod was a completely new Autopiolot that takes photo's every 10 degrees,, then speed is no longer relevant.
 

volate!lo

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Thats the point: Low speeds don't work, so your original idea sounds simple but doesn't work.
Hence the need for a new autopilot instead, which of course would make speed of travel between photos irrelevant.

I need to rework the AP control in the near future for different autopilots I have in mind. Once that is done (which is the hard part) such an AP for photogrammetry is easy.
Won't happen in the next days though
 
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volate!lo

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v1.14 has just been released to play store as Beta version. As always it may take a few hours for playstore to replicate its data

Changes since 1.12a

New
* Headless mode: once activated pitch & roll directions remain as they are, regardless of Tello's heading (yaw)
* Boomerang autopilot: dronie followed by 360 (optional), and reverse dronie back to you
* Phone's GPS position added as EXIF tags to JPG files
* Audio recording: Record the phone's mic and add it to the video
* Audible alarm on VPS inactive / not received
* Checks controller stick position neutral before takeoff
* Inc / Dec Bitrate can be assigned to controller button
* Screen recording: Integrated screen recorder doing 1280x720 @ 2Mbps


Changes
* Permissions are now optional except for storage permission
* Recording stops after autopilot end - if (and only if) it was automatically started for this autopilot
* Up & Away renamed to "Dronie"
* "Start Recording on Takeoff" now automatically switches the camera to video mode
* Correction of horizon only if rotated by more than 5 deg
 

volate!lo

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Can I screenrecorder and video recording with tello turn on at the same time.
depends how powerful your phone is. My S4 test device can handle Tello Vide, Screen recording and h264 (i.e. 3 video files at the same time) no problem.
 

volate!lo

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For me, one file is ok and the other is damaged, can not be played.
If that happens only if both are recorded at the same time, but work fine individually, the solution is simple: Just record one .

Some phones have not enough power, others have restrictions on how many concurrent encoding / decoding jobs they can handle.
 

volate!lo

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If your phone is not capable of recording two videos at the same time you just can't use both together. Do a screen recording, or do a tello video. Not both.
 

andboga

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Ok, I understand. Thank you for the answers. I know you are very busy. Your application is great.:)(y)
 

volate!lo

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Ok, I understand. Thank you for the answers. I know you are very busy. Your application is great.:)(y)

Ooops, I forgot one thing you can try: There is a secret way to decrease the bitrate for the screen recording.

1) Open menu => about
2) 3x tap the "Credits ..." section
3) enter "s:scrmbps=1"

This will set bitrate to 1Mbps. To return to default setting follow the same but "s:scrmbps=2" for 2Mbps.
Also you may reduce your video bitrate in the video settings to 1 or 2 Mbps.

If that does not help your phone just isn't capable of running multiple encoders at once.


What phone model is this and what is the display resolution of this phone?
 

andboga

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My phone - Samsung J3-6. After changing to 1, no changes. When I turn on screenrecorder and then tello video is a broken tello video file. When I enable tello video and then screenrecorder is a broken screenrecorder file.
 

volate!lo

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OK, so this phone really only supports on encoder at a time.
Have you tried to record Tello video and record the screen with DURecorder app?
 

andboga

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I installed Durecorder. It works the same. Only saves one file correctly. It's the fault of a weak phone. You were 100 percent correct. Thank you again .
 

volate!lo

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I installed Durecorder. It works the same. Only saves one file correctly. It's the fault of a weak phone. You were 100 percent correct. Thank you again .
Phone manufacturers have to pay royalties for encoders. The more capable an encoder, the more expensive it is.
So cheaper phones have fewer encoder capabilities, nothing we can do.
 

umanbean

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Wow... for all of us in the peanut gallery that was a great lesson in how to troubleshoot a problem (posts 2087 - 2098)
  • Problem stated
  • Questions asked
  • Questions answered
  • Resolution and explanation, all in about 6 hours
  • Everyone happy ( except andboga, who now wants a new phone :))
Folks, it don't get no better!
 
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volate!lo

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Wow... for all of us in the peanut gallery that was a great lesson in how to troubleshoot a problem (posts 2087 - 2098)
  • Problem stated
  • Questions asked
  • Questions answered
  • Resolution and explanation, all in about 6 hours
  • Everyone happy ( except andboga, who now wants a new phone :))
Folks, it don't get no better!
This could have been handled much clearer and quicker, but I am currently focussed on fixing a tiny bug in the permission handling. Just released 1.14a including a fix.
Next few days is family weekend, so not much to expect from my side. Have fun !
 
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