Tvheadend

I use software ffmpeg transcoding, however I would like to see options in the transcoding.
I use it often to get a lower bitrate since my internet upload speed (~6mbit) is to slow for some channels. However I use an old slow spare laptop as tvheadend server, this one however does not support (or I suspect it does not) hardware transcoding so I need to limit software transcoding to 384 when infact my bitrate would allow 576 in mpeg4-avc (also some transcoding seems harder, like sport events or action sequences. However some channels already are in mpeg4-avc, but theses channels will also be transcoded.

So the feature I would like to see is a check a box to only transcode mpeg2/HD channels(sould be fairly easy to detect I suspect), or channels with higher bitrates (I know that this one is impossible since most channels can go from 1mbit - 10mbit).

Best regards!