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The filters you're using probably don't support your pixel format and are converting it to something else. Make sure to convert it back to what you need with, for example, the format filter after.
hello
this is what i want
ffplay test.mp4 -vf "drawbox=100:100:100:100:black@1,vflip"
the source video
right result
but when i use FFmpegFrameFilter, I can not get the same result
error result
FFmpegFrameFilter with sigle filter i can get correctly result, but when i use filterchain or filtergraph, the final result is always like this
this is my code:
thank you
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