Altough pixel in other formats (GF_PIXEL_RGB,  GF_PIXEL_BGR, etc.) all well supported, image data send with GF_PIXEL_RGBA format to the pngenc filter outputs an image with the correct size, but with no data from the image.

Command line for testing :
gpac -i 32bpp-320x240.bmp -o test.png

with the enclosed image:
[32bpp-320x240.bmp.zip](https://github.com/gpac/gpac/files/12122641/32bpp-320x240.bmp.zip)

Filter pngenc does not support GF_PIXEL_RGBA
This is a GitHub Issue
repo:gpac
owner:gpac
Title : Filter pngenc does not support GF_PIXEL_RGBA
Issue date:

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Altough pixel in other formats (GF_PIXEL_RGB,  GF_PIXEL_BGR, etc.) all well supported, image data send with GF_PIXEL_RGBA format to the pngenc filter outputs an image with the correct size, but with no data from the image.

Command line for testing :
gpac -i 32bpp-320x240.bmp -o test.png

with the enclosed image:
[32bpp-320x240.bmp.zip](https://github.com/gpac/gpac/files/12122641/32bpp-320x240.bmp.zip)

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