Using libav transpose filter with DRM in ffmpeg

    Hi,

    I am trying a modified version of the hello_drmprime on GitHub which uses DRM planes to render the video on the screen. I am trying to rotate the videos by 90 degrees using libavfilter ffmpeg tranpose filters as the DRM offers me only a 180 degree rotation .

    My program to rotate is exactly the same as https://ffmpeg.org/doxygen/3.2/fi…8c-example.html which does the exact same thing ( transpose ) , and its not working.

    I keep getting the error -

    Code
    Impossible to convert between the formats supported by the filter 'auto_unsand_0' and the filter 'auto_scaler_1'

    I am using the default version of ffmpeg available from RaspBerry Pi repositories.

    Please do let me know if I am missing anything.

    Thanks

    Ash Naik.