Walksnail OSD srt tool

[breadoven]

I made the following little app to make it easier to quickly overlay OSD info onto the Walksnail video recordings. It exploits the subtitle, (.srt) files that Walksnail already produce for the link data to also add most of the more useful OSD fields. It is largely aligned with original OSD layout but not entirely because it uses standard ASCII characters so many single character INAV glyphs require fields greater than a single character to be meaningful which slightly upsets the overall character alignment.

Currently only works with INAV and Windows. Main benefit over other tools that fully render the complete OSD to the video is simply speed. This takes seconds rather than minutes ... or many, many minutes in my case. Subtitles need to be Left aligned and use a monospaced font for best effect.

https://drive.google.com/drive/folders/1vx3DLq6QevYfR5-MISjbIcj15xjM23e_?usp=drive_link

[Jetrell]

Nice... This makes testing and analyzing Avatar OSD data much faster.

[breadoven]

Version 2 available with following improvements:

1. User editable character map added allowing user to change text displayed for OSD glyphs as required. Character map can also be configured for use with different firmware types, Betaflight etc, although current map only includes INAV entries. Character map is available from Help button.
2. OSD line formatting improved to try and maintain more consistent spacing (prevents text jumping horizontally).
3. Option added to restore original Walksnail .srt file.

[breadoven]

New version available (2.0.0.3) which allows use of double width fonts without upsetting the horizontal text alignment. The font used in the video player just needs adding to the charmap.txt file. There's an example charmap.txt_MS_Gothic file using the "MS Gothic" font included in the latest version. "MS Gothic" is monospaced and has more characters than other fonts some of which are useful for this application.

New version is also much faster than before.

Other than producing an "INAV" font this is probably about as good as it's going to get using this method for a Walksnail OSD overlay.

[breadoven]

2.0.0.4 available which fixes speed issues when using double width fonts and also allows multiple files to be selected and processed at the same time. Now almost instantaneous even for 10 min video files.

[Jetrell]

I not sure how you can give this more publicity. Other than post it on the Walksnail discord forum. Where the other 3 OSD rendering tools are posted.

I've found this more useful than the others in its own way. For fast viewing of the OSD info in HD, when I'm out testing stuff at the field. It saves a heap of time.
Some will likely say ain't showing the Sneaky font. So they don't like it.. But horses for courses. This has its place. Most laptops you'd take out flying wouldn't have a descent enough graphics card to render with the standard tools, anywhere near as fast and efficiently as this tool does.

[breadoven]

After the latest tweaks I think this tool now pretty well does what was originally intended which was to quickly render a useable OSD overlay on the Walksnail videos, with speed being the main criteria. This now processes the OSD overlay for a 10 min video in almost the same time it takes for most video players to start up. The other tools are too slow if all you want to do is see the OSD info overlaid on the video for testing purposes. Another problem with the other tools is you end up with essentially 2 copies of the original video if you want to keep a virgin copy of the video without the OSD cluttering up the view. This takes up a load of disc space.

Feel free to mention this on the Walksnail Discord forum if you like @Jetrell. I'll mention it elsewhere. Might need Gitifying also to give it more credibility. I'll look into that although I'm not much interested in maintaining a Git repository for it.

Have you tried this tool @Painless360 ?

[Jetrell]

@breadoven I had noticed how much faster the tool is to render since 2_0_0_3... I missed 2_0_0_2.
But I had also noticed the OSD jumps around a lot vertically since 2_0_0_1.

I'm not sure if this is something to do with the Intel graphics on this laptop.. This was still running the playing back with the recommended POTPlayer, using Consolas font. Alignment didn't make any difference.
I would seem from the OSD characters, that some of them got missed in the rendering of some frames. Which might be why its jumping. As they disappear and reappear.

[breadoven]

Can't say I've noticed anything other than characters missing sometimes. I put that down to Walksnail which does seems to drop characters not infrequently, you notice it during the flight. The OSD file also has missing byte glitches in some frames. I guess you could check by looking at the video playback in the googles or rendered with the other tools.

There is also the other charmap.txt file in the resources folder, called charmap.txt_MS_Gothic (? button -> Character Map button). This is intended to be used with the MS Gothic font which has more useful characters than the Consolas font. To use it you just need to rename charmap.txt_MS_Gothic so it's just got the .txt extension (rename the other charmap.txt to something else if you want to keep it). Setup the video player to use the MS Gothic font (should be available since it's a basic system font). I've been testing using this font so don't know if I missed something that might cause the vertical jumping using the Consolas font. I'll check.

[Jetrell]

Yes. It works better now with MS Gothic. Thanks for the insight.