Allow passing -t / time limit parameter to FILE consumer

[pyahmed]

Description

Allow passing the -t parameter (as is used in ffmpeg) to the file consumer. It would allow recording precise durations, without having to send a REMOVE command at the right time. Right now starting a recording with the -t parameter (s. below) doesn't really work:
ADD 1 FILE "Output.mxf" -codec:v dnxhd -b:v 120M -flags:v +ilme+ildct -threads:v 4 -filter:v format=yuv422p,interlace -t 4

CasparCG warns you:
Unused option t=4

it will keep recording until you remove the consumer:
REMOVE 1 FILE "Output.mxf"

PS: there is also a hardcoded parameter when mov/mp4 container is used:
Unused option preset=veryfast:v

Solution suggestion

If possible pass the -t parameter to ffmpeg, so that it stops when the time limit is reached.