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Finally an easy way to view (SRT) flight data
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15033 61 2018-3-12
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rapakiri
lvl.2
Flight distance : 1055827 ft
Slovakia
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Hmm, Im not able to upload Mavic 2 Zoom .srt file. I get "Sorry. File not supported." message. I tried Win 7, 10 with Chrome. Any ideas?

Sample here:

1
00:00:00,000 --> 00:00:00,020
<font size="36">FrameCnt : 1, DiffTime : 20ms
2019-05-02 11:20:51,184,606
[iso : 100] [shutter : 1/1600.0] [fnum : 380] [ev : 0] [tar:210, luma:212, dg:4360, u_xhs:78, k_xhs:78] [RGBGain : (2210,1000,1519)] [ct : 5587] [color_md : default] [focal_len : 470] </font>

2
00:00:00,020 --> 00:00:00,040
<font size="36">FrameCnt : 2, DiffTime : 20ms
2019-05-02 11:20:51,204,606
[iso : 100] [shutter : 1/1600.0] [fnum : 380] [ev : 0] [tar:210, luma:212, dg:4360, u_xhs:78, k_xhs:78] [RGBGain : (2210,1000,1519)] [ct : 5587] [color_md : default] [focal_len : 470] </font>

3
00:00:00,040 --> 00:00:00,060
<font size="36">FrameCnt : 3, DiffTime : 20ms
2019-05-02 11:20:51,224,609
[iso : 100] [shutter : 1/1600.0] [fnum : 380] [ev : 0] [tar:210, luma:212, dg:4360, u_xhs:78, k_xhs:78] [RGBGain : (2210,1000,1519)] [ct : 5587] [color_md : default] [focal_len : 470] </font>

4
00:00:00,060 --> 00:00:00,080
<font size="36">FrameCnt : 4, DiffTime : 20ms
2019-05-02 11:20:51,244,607
[iso : 100] [shutter : 1/1600.0] [fnum : 380] [ev : 0] [tar:210, luma:212, dg:4360, u_xhs:78, k_xhs:78] [RGBGain : (2210,1000,1519)] [ct : 5588] [color_md : default] [focal_len : 470] </font>
2019-5-3
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rapakiri
lvl.2
Flight distance : 1055827 ft
Slovakia
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now I realized, there  is no position data in .srt...
2019-5-3
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0Kajuna0
Captain
Flight distance : 249606 ft
Spain
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rapakiri Posted at 5-3 01:44
now I realized, there  is no position data in .srt...

Are you on the latest firmware version? The update from late 2018 enabled geolocation data (except elevation)
2019-5-10
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djiuser_cjggo30y5mo9
lvl.1

Switzerland
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0Kajuna0 Posted at 5-10 10:10
Are you on the latest firmware version? The update from late 2018 enabled geolocation data (except elevation)

I extracted SRT-Files from Phantom4Pro Videos using your experimental script, which worked fine...
However, your (very cool) viewer throws "Sorry, file not supported".
I viewed the SRTs, and the gps locations are stored in them.
Here some example data:
1
00:00:00,000 --> 00:00:01,000
F/3.2, SS 160, ISO 100, EV 0, GPS (8.2090, 47.4692, 18), D 49.21m, H 45.60m, H.S 0.00m/s, V.S 0.00m/s


2
00:00:01,000 --> 00:00:02,000
F/3.2, SS 160, ISO 100, EV 0, GPS (8.2090, 47.4692, 18), D 49.24m, H 45.60m, H.S 0.20m/s, V.S 0.00m/s


3
00:00:02,000 --> 00:00:03,000
F/3.2, SS 160, ISO 100, EV 0, GPS (8.2090, 47.4692, 18), D 48.08m, H 45.60m, H.S 1.90m/s, V.S 0.00m/s


4
00:00:03,000 --> 00:00:04,000
F/3.2, SS 160, ISO 100, EV 0, GPS (8.2090, 47.4692, 18), D 45.68m, H 45.60m, H.S 2.62m/s, V.S 0.00m/s


5
00:00:04,000 --> 00:00:05,000
F/3.2, SS 160, ISO 100, EV 0, GPS (8.2090, 47.4692, 18), D 43.14m, H 45.60m, H.S 2.44m/s, V.S 0.00m/s

2019-7-5
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0Kajuna0
Captain
Flight distance : 249606 ft
Spain
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djiuser_cjggo30y5mo9 Posted at 7-5 00:55
I extracted SRT-Files from Phantom4Pro Videos using your experimental script, which worked fine...
However, your (very cool) viewer throws "Sorry, file not supported".
I viewed the SRTs, and the gps locations are stored in them.

Thanks. Will have a look at it. I think I had never gotten my hands on phantom4pro data.

Sorry for my very late reply. Apparently this forum does not send important notifications like these through email
2019-7-11
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0Kajuna0
Captain
Flight distance : 249606 ft
Spain
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djiuser_cjggo30y5mo9 Posted at 7-5 00:55
I extracted SRT-Files from Phantom4Pro Videos using your experimental script, which worked fine...
However, your (very cool) viewer throws "Sorry, file not supported".
I viewed the SRTs, and the gps locations are stored in them.

Reading Phantom4Pro SRT files should work now

https://tailorandwayne.com/dji-srt-viewer/

Although accuracy looks pretty bad. That's on DJI
2019-7-12
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0Kajuna0
Captain
Flight distance : 249606 ft
Spain
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Now supporting p4p rtk logs!
2019-8-22
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0Kajuna0
Captain
Flight distance : 249606 ft
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Good news! The latest Mavic 2 update has added altitude to the srt information! Performance of the app has also been dramatically improved:

https://tailorandwayne.com/dji-srt-viewer/
2019-9-21
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0Kajuna0
Captain
Flight distance : 249606 ft
Spain
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Could anyone check if the Mavic Mini records srt files (video caption option in the app)?

Thanks!
2019-11-3
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0Kajuna0
Captain
Flight distance : 249606 ft
Spain
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Just to confirm, yes, the Mavic Mini records telemetry in the subtitles and it is usable with the telemetry overlay tools: https://djitelemetryoverlay.com/
2019-12-29
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RebAlumni
lvl.1

United States
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Is it possible to create an off-line version of this that can be installed locally on a PC?  
2020-4-14
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0Kajuna0
Captain
Flight distance : 249606 ft
Spain
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RebAlumni Posted at 4-14 12:10
Is it possible to create an off-line version of this that can be installed locally on a PC?

@RebAlumni It is possible. The problem is that the maps and satellite images won't load when offline, so the benefits are not huge. I might create something in the long term, you can subscribe to the newsletter where I announce these things, if you want http://eepurl.com/gVml41
2020-4-15
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RebAlumni
lvl.1

United States
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0Kajuna0 Posted at 4-15 15:50
@RebAlumni It is possible. The problem is that the maps and satellite images won't load when offline, so the benefits are not huge. I might create something in the long term, you can subscribe to the newsletter where I announce these things, if you want http://eepurl.com/gVml41

Thank you for the information... I will subscribe!  For my use case, I don't necessarily need the map imagery, just the ability to convert the .srt file into a .kml or .gpx file that can easily be emailed.  I fly drones on wildfires (as part of the team that manages/fights the fires) and fly the perimeter of the fire to provide daily updates on the fire's progress.  I'd like to be able to send a .kml of the perimeter back to incident command post, where a GIS specialist will take the file and update the fire map to give to the incident commander.
2020-4-15
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0Kajuna0
Captain
Flight distance : 249606 ft
Spain
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RebAlumni Posted at 4-15 16:07
Thank you for the information... I will subscribe!  For my use case, I don't necessarily need the map imagery, just the ability to convert the .srt file into a .kml or .gpx file that can easily be emailed.  I fly drones on wildfires (as part of the team that manages/fights the fires) and fly the perimeter of the fire to provide daily updates on the fire's progress.  I'd like to be able to send a .kml of the perimeter back to incident command post, where a GIS specialist will take the file and update the fire map to give to the incident commander.

Hey @RebAlumni ,

I did a quick test and I'm able to help you with a standalone pc app. Can you email me at app@prototyping.barcelona ?

Thanks
2020-4-18
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0Kajuna0
Captain
Flight distance : 249606 ft
Spain
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Just a quick update. This is now compatible with the Mavic Air 2
2020-7-15
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djiuser_9RRgIdNwVsDG
lvl.1
Flight distance : 52280 ft
Germany
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Great tool! Thanks for developing and sharing!
2020-7-23
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0Kajuna0
Captain
Flight distance : 249606 ft
Spain
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Thanks. Happy you like it
2020-7-24
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JediDroner
lvl.1
Flight distance : 30390 ft
United States
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I am trying to load my .srt file from brand new FPV with recent (yesterday) firmware upgrade to the latest.  Visiting https://djitelemetryoverlay.com/srt-viewer/ and selecting the .srt file that was generated returns the message "Sorry, file not supported". The site says that FPV is a supported drone for viewing SRT data.  What else do I need to do?  I have tried the srt file from the drone and the googles with the same result
7-27 03:52
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JediDroner
lvl.1
Flight distance : 30390 ft
United States
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JediDroner Posted at 7-27 03:52
I am trying to load my .srt file from brand new FPV with recent (yesterday) firmware upgrade to the latest.  Visiting https://djitelemetryoverlay.com/srt-viewer/ and selecting the .srt file that was generated returns the message "Sorry, file not supported". The site says that FPV is a supported drone for viewing SRT data.  What else do I need to do?  I have tried the srt file from the drone and the googles with the same result


Here is an excerpt from one of the .srt files  
117 00:00:17,565 --> 00:00:17,715 signal:N/A ch:N/A flightTime:N/A uavBat:N/A glsBat:7.5V delay:33ms bitrate:50.8Mbps Height:36.6m Distance:6.9m HS:0.0m/s VS:0.2m/s gpsNum:26  

118 00:00:17,715 --> 00:00:17,865 signal:N/A ch:N/A flightTime:N/A uavBat:N/A glsBat:7.5V delay:35ms bitrate:50.8Mbps Height:36.7m Distance:7.0m HS:0.1m/s VS:1.4m/s gpsNum:26  

119 00:00:17,865 --> 00:00:18,015 signal:N/A ch:N/A flightTime:N/A uavBat:N/A glsBat:7.5V delay:36ms bitrate:50.8Mbps Height:36.7m Distance:7.0m HS:0.1m/s VS:1.4m/s gpsNum:26  

120 00:00:18,015 --> 00:00:18,165 signal:N/A ch:N/A flightTime:N/A uavBat:N/A glsBat:7.5V delay:30ms bitrate:50.8Mbps Height:36.9m Distance:7.0m HS:0.1m/s VS:1.1m/s gpsNum:26
7-27 08:48
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0Kajuna0
Captain
Flight distance : 249606 ft
Spain
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JediDroner Posted at 7-27 08:48
Here is an excerpt from one of the .srt files  
117 00:00:17,565 --> 00:00:17,715 signal:N/A ch:N/A flightTime:N/A uavBat:N/A glsBat:7.5V delay:33ms bitrate:50.8Mbps Height:36.6m Distance:6.9m HS:0.0m/s VS:0.2m/s gpsNum:26  

Hi,

As you can see in the SRT data, there is no reference to GPS coordinates (latitude, longitude), so the SRT viewer does not have enough information to display a map.

Unfortunately the subtitle data in the DJI FPV has been changing between firmware versions. Early review units did record usable GPS data (although altitude was incorrect). Production frimware versions have either disabled SRT data altogether or just included some fields like battery, signal... Some users have used the GPS data successfully in newer versions, but I'm not sure what they are doing differently.

If you want to display your data on top of the video, you can still link your flights to airdata.com, download them as CSV files and create gauges in Telemetry Overlay. Here's an example of what some users are doing that way:
7-27 14:23
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Mark Newton5
lvl.1

Australia
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Hi    Nice software...very helpful.   For some reason the altitude is way off with gpx srt from my DJI FPV drone.   Altitude in flight is shown correctly.   Thanks.
9-29 14:20
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0Kajuna0
Captain
Flight distance : 249606 ft
Spain
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Mark Newton5 Posted at 9-29 14:20
Hi    Nice software...very helpful.   For some reason the altitude is way off with gpx srt from my DJI FPV drone.   Altitude in flight is shown correctly.   Thanks.

Hi. Glad you like the software!

Could you send your data file by email so I can analyse the problem? I suspect this might be because the altitude on thee software is corrected for sea level and in flight is not (or vice-versa). If you can also share a screenshot of where exactly you are seeing the wrong altitude, I appreciate it.

Thanks
10-1 11:07
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