You can find on this link 3 files : https://www.dropbox.com/sh/4gfw3 ... c3CICCiqWBK5Ea?dl=0
- DroneSubt : copy of subtitles in a file (SRT) from a video MP4 of drone (use ffmpeg tool inside zip file)
- DroneSubtSplit : extract part of a subtitles file (SRT) and redefine timing
- DroneSubtAdd : merge several SRT files to have a selection of mp4 re-merged (use ffmpeg to obtain time of video MP4)

Incredibly useful resource... I am sure there's other tools out there that do a similar job but this one is specific and simplified to the max.

Thank you so much for sharing this resource within our community!

2020-04-09 I have posted DroneSubt v2.0

Files above updated

Thanks a lot for this Rjn. I have downloaded it but not yet tried it.

It is funny I see this now. Just the other day, I was flying and recording, and after the flight I see that my video was divided into two 4GB  files. I have been meaning to ask 2 questions.

1/ What is the best tool to use to merge the files?

2/ If I merge the files, how can I keep the subtitles?

Any help would be appreciated.

Merci.

StubbornSwiss Posted at 4-9 13:30
Thanks a lot for this Rjn. I have downloaded it but not yet tried it.

It is funny I see this now. Just the other day, I was flying and recording, and after the flight I see that my video was divided into two 4GB  files. I have been meaning to ask 2 questions.

Hi StubbornSwiss. The best tool is AVIDEMUX (it's free). enter first file, add second file ; parm : video=copy and record.
I am working on a tool to merge subtitles.

RJn Posted at 4-9 22:38
Hi StubbornSwiss. The best tool is AVIDEMUX (it's free). enter first file, add second file ; parm : video=copy and record.
I am working on a tool to merge subtitles.

When the files are merged, will the saved file be in the same resolution as the original?

Thank you.

great work, is the anything similar for MacOS available?

StubbornSwiss Posted at 4-10 01:50
When the files are merged, will the saved file be in the same resolution as the original?

Thank you.

When files are merged by AVIDEMUX, it's the same resolution (=copy) but missing original subtitles.

Files updated, droneSubtAdd added

Thank you so much Rjn.

Everything is working perfectly!

StubbornSwiss Posted at 4-10 15:33
Thank you so much Rjn.

Everything is working perfectly!

a new version more rapid is done today : 2020-04-11

Thank you very much for these very useful tools

Rjn......

What is the ffmpeg.exe

Thank you.

StubbornSwiss Posted at 4-11 12:06
Rjn......

What is the ffmpeg.exe

ffmpeg is a librairy of tools for mpeg files  (MP3, MP4, HEVC...). It must be placed in the same directory with DroneSubt

RJn Posted at 4-11 12:29
ffmpeg is a librairy of tools for mpeg files  (MP3, MP4, HEVC...). It must be placed in the same directory with DroneSubt

Ok..... so I don't actually use it. Just need to leave it in the same directory, correct?

Thank you again.

StubbornSwiss Posted at 4-11 14:38
Ok..... so I don't actually use it. Just need to leave it in the same directory, correct?

Thank you again.

Yes, that's it !   

Next version for droneSubtAdd
v2.1 : this will correct time when data is missing at the end of SRT

I am a new Mini owner and can not seem to get the mini chip to read in any of my Apple devices. (macBook Air, IPhone, iPad). They all come in as a MP4 file and it will not read it.
What do I use to see the photos?  Thank you. Mikro

The DroneSubt app won't create a working SRT correctly for use in applications like Davinci Resolve. Turns out because it's doing a double line feed after each subtitle entry, and needs to be a single newline. The way it is currently when dragged into the editor only shows the first subtitle entry. I have to go an extra step in Notepad++ to find /n/n and replace it with /n to make it work.

karlblessing Posted at 10-18 20:21
The DroneSubt app won't create a working SRT correctly for use in applications like Davinci Resolve. Turns out because it's doing a double line feed after each subtitle entry, and needs to be a single newline. The way it is currently when dragged into the editor only shows the first subtitle entry. I have to go an extra step in Notepad++ to find /n/n and replace it with /n to make it work.

Hello, this is the "ffmpeg" extractor app adding an extra line.
We must effectively remove a line.
I have upgraded the application to deduce this line.

Hi, I recommend this tool:
- https://github.com/gpac/gpac
Its open source and you can run in your pc, good for large files.
- Steps:
MP4Box -info input.mp4   (to extract track id of text:text)
MP4Box -srt <trackID> input.mp4    (generate file with subtitles coordinates)

I am looking for a tool that allows me to merge several srt files from the dji goggles v2 into one file.

DroneSubtAdd doesn't work..


edit: i found this tool, works great for me

https://www.happyscribe.com/subtitle-tools/sync-subtitles