exposed more libavcodec
exposed more libavcodec

markreidvfx/PyAV,danielballan/PyAV,PyAV-Org/PyAV,xxr3376/PyAV,xxr3376/PyAV,markreidvfx/PyAV,mikeboers/PyAV,mcpv/PyAV,pupil-labs/PyAV,xxr3376/PyAV,markreidvfx/PyAV,danielballan/PyAV,mikeboers/PyAV,pupil-labs/PyAV,danielballan/PyAV,mcpv/PyAV,pupil-labs/PyAV,pupil-labs/PyAV,PyAV-Org/PyAV,mcpv/PyAV