Start and stop recording at specified timecodes

Being a very lazy technician, I wonder if there would be a way to start and stop a capture the same way Media Express does when we specify the timecode in/timecode out ?

At the moment I see two things that could make it difficult at the moment :
* The low level RS422 commands to control a deck don't seem very well documented by decks manufacturers
* vrecord is single threaded, which would prevent the recording and real-time TC reading being done at the same time

Regarding the deck control the decklink API could be used but vrecord being a bash script, it might be better if we could control it directly sending low level commands to the `/dev/tty.RS422 Deck Control` interface.

For the single thread issue, maybe a side script could read the TC from the serial port and start and stop the recording when the values are reached ?

Just mixed ideas there... :)

Side note if it can be useful, I found the link for an unofficial Sony 9-Pin protocol specs which I was looking for to control our JD30 deck.
[ftp://ftp.jurassic.nl/mirrors/ftp.sgi.com/sgi/video/rld/vidpage/s9pinnt.html](ftp://ftp.jurassic.nl/mirrors/ftp.sgi.com/sgi/video/rld/vidpage/s9pinnt.html)