Feature Request: Render OSD as video ONLY (transparent background)

[Pairan]

Currently I'm struggling a bit with the intended workflow (v0.9). My DVR videos are about 9mins long and as such create a humongous pile of PNG files as I choose to render PNG only.

These 9min of DVR footage result in about 35840 PNG files ... to process these within the video editor of choice is not much of a pleasant task :) So here is my suggestion

add an option where the OSD is generated as a video with transparent background ONLY

That would make file handling MUCH easier and not even cost to much changes in the code .. e.g.

if option transparent osd video is checked then return a transparent frame instead of the frame in the video.

    def read_frame(self):
        ret, frame = self.videoFile.read()
        if not ret:
            return None

        if len(frame) == 0:
            return None

       """
            could look like this perhaps:
       """
       if transparent_osd_video:
            return transparentFrame


        return VideoFrame(frame)

Benefits

• The resulting video would be easy to overlay over ANY format and content
• It's only ONE file against several 35840 per 9min (I fly long trips, ... yes!)

[kirek007]

Hey, I think that you're importing png sequences in the wrong way :) usually (premiere pro, DaVinci and vega) are able to import all png in a few seconds as a clip. Which video editor are you using?

But, you're right, PNGs are heavy in terms of used space. I'll take that into account :)

[Pairan]

Using Final Cut Pro X in the latest version on a Mac Studio with 64GB RAM and the not so slow M1 MAX :)

[kirek007]

I have no experience with this one :)

[Pairan]

Additional observation on this: the last 40 PNG files seem to to be corrupt! ... if I skip those out, the data is processed.

FCPX (Final Cut Pro X) is capable of doing such imports and the handling is exact as described in some other products: Drag all files in, add them to the time line and align the combined file with the (dvr) video.

TL;DR;
out of 38540 files only 38500 have been legit PNG files showing an OSD :)

[kirek007]

@Pairan Hey, just a heads up that I'm working on it, and looks like I'm able to do so. So PNG files will be gone very soon :)

[Pairan]

Sounds good to me :) Let me know, when I can give it a try