[FFmpeg-user] Can FFmpeg create a separate transparent PNG track?

[Werner Robitza]

>
> (Complete, uncut console output missing.)
>

I know, but I figured it would be obvious from the example that it does not
"simply" work that way since the transparent PNG is automatically encoded
with to an MPEG-4 or H.264 bitstream unless other options are supplied.

Both png and qtrle can be put into an isom container and read by
> third party applications.
>

 Would you have an example command of how to achieve that?

Thanks,
Werner