Guess the frame rate, based on both the container and codec information.
@param ctx the format context which the stream is part of
@param stream the stream which the frame is part of
@param frame the frame for which the frame rate should be determined, may be NULL
@return the guessed (valid) frame rate, 0/1 if no idea
Guess the frame rate, based on both the container and codec information.
@param ctx the format context which the stream is part of @param stream the stream which the frame is part of @param frame the frame for which the frame rate should be determined, may be NULL @return the guessed (valid) frame rate, 0/1 if no idea