Why only BGR formats for FrameOutput?

[acras01]

Hello! I'm new here so sorry for newbie question. Why does lib suggest only BGR24/BGRA image formats? In our application we need ARGB, so we have to perform the byte conversion on-the-fly. Any restrictions by ffmpeg itself? Thank you!

[kokorin]

Jaffree uses NUT format to read/write BufferedImage. NUT format supports any pixel format which ffmpeg supports, so there is no limitation in ffmpeg.

But the problem is that conversion between pixel formats requires a lot of CPU, so Jaffree opts for no pixel format conversion. Instead it reads raw bytes and constructs BufferedImage with no byte manipulations.
I found only 2 formats that can be converted to BufferedImage: argb and bgr24.

Check ImageFormats for details. To support new pixel format one just needs to corresponding ImageFormat implementation.

[acras01]

Could also clarify what pixel format (or image format) you need?

I need argb, but withConsumerAlpha gives me bgra

[acras01]

Could you point to that piece of code?

Jaffree/src/main/java/com/github/kokorin/jaffree/ffmpeg/FrameOutput.java

Line 180 in b503d1f

return withConsumer(consumer, ImageFormats.ABGR);

[acras01]

So in you project you could implement ImageFormat and use it.

I can't do it, cause appropriate method is protected
protected static FrameOutput withConsumer(final FrameConsumer consumer, final ImageFormat imageFormat)

[kokorin]

Sorry, my bad, I missed argb with abgr.
Let me clarify this once again: I didn't find any other format (except abgr and bgr24) which can be converted to BufferedImage without byte manipulation. ImageFormats works quite fast because it doesn't construct BufferedImage and fill it pixel but pixel, but it instead uses byte array (read from ffmpeg output) and creates BufferedImage with byte array as source.

I can't do it, cause appropriate method is protected

I agree, this method, probably, should be public. But subclass has access to this method, right?

I need argb

Could you provide code snippet, which creates BufferedImage from byte array in argb without byte manipulations?

[kokorin]

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