Ensure jobs scheduled at the first time the graph pause are NOT done twice.
Ensure that VSFilter's loading option would be stored at the first time the graph pause
Create systray only when the connection with consumer has established
Call StartStreaming only when the connection to a consumer has established
Never hidden input pin when no consumer found at the time we join the filter graph
loose matching condition for value of ASS tag YCbCr matrix
Report a NONE YCbCr Matrix to consumer when YCbCr Matrix in script is none
Fix log macro
Add log to trace locking
Return a NULL subtitle frame if the dirty rectangle is empty or else consumer might failed to deal with it