Originally Posted by phildaant
Oh that sucks. I was hoping it had a long time for live record as long as there was enough free disk space like on computers and other DVRs.
So if I want to keep my recording of whatever I am watching (a sport game), then I will have to use scheduled recordings instead?
No... you're misunderstanding what the REC button does, and how the "recording buffer" works..
The recording buffer is emptied immediately whenever you change a channel, and starts "filling" again on the newly selected channel. It remains filling as long as you remain tuned to that channel, up to a maximum size. In the case of HD, that maximum size file is about equal to 30 minutes.
But this 30-minute HD recording buffer "slides forward" in time, along with real time. So as you continue to watch that channel, the oldest contents of the buffer are deleted from the end of the buffer, and the current contents (i.e. of what is "live TV") get continually added to the front of the buffer.
So the buffer is always the most recent 30 minutes.
Now, at any time you can push PAUSE or REW or PLAY, and navigate through that buffer... essentially providing complete replay capability for the most recent 30 minutes. And of course if you are watching something old in that buffer on your screen (say that was shown 15 minutes ago), while you are watching the "sliding-forward 30 minute buffer" continues to "slide", emptying out at the oldest end and continuing to fill at the newest end. So you can continue to re-watch what was shown 15 minutes ago and that "15 minute" marker will "slide forward" with everything else, effectively putting on the screen a 15-minute delayed image, if you get my drift.
As long as you don't change channels (which is critical, else you're instantly purge the recording buffer and start all over with a brand new one for the newly tuned-to channel) the recording buffer will continue to operate in this way, always holding the most recent 30 minutes maximum, and always "sliding forward" in time. You always have "instant replay" (or, say, re-watch something on a show that happened a while ago with a person who just entered the room) ability within this "up to the last 30 minutes" recording buffer.
Now... whenever you push the REC button when you are also watching LIVE TV (i.e. one of the two tuners in the DVR is in the "foreground", and sending its output to your HDTV display screen), that initiates the RECORDING function of the DVR for the current "foreground tuner". And that means the currently tuned channel of that foreground tuner starts recording, putting out a named recording on your hard drive based on that program/channel in the Guide.
And that manually initiated recording process on that channel will continue for as long as you don't stop the recording, up to the end of the program as specified in the Guide. It will stop recording automatically at the end of the program however long the Guide said it was.
While this manually initiated recording continues, you can also then "swap viewing tuners" (bringing tuner 2 to the foreground so that it's tuned channel is visible on your screen and moving tuner 1 which is doing this recording to the background where it is "invisible" but continues to record, or vice versa depending on which tuner was in the "foreground" and on the screen at the time when you swapped tuners) and the manually initiated recording for that channel you were just watching "live" WILL CONTINUE TO RECORD IN THE BACKGROUND. The duration of that manually initiated now-background recording is however still just long that program is, in the Guide, and no longer . It's effectively as if you'd pre-scheduled that program to be recorded and the tuner that got assigned for recording was the background tuner. So you'll end up with a recording that is no longer than the program itself.
In other words pushing the REC button on the DVR is not entirely like pushing the REC button on a VCR, where you have to then push STOP to stop recording. With an "intelligent" DVR, the STOP button is conceptually automatically pushed for you when the program logically ends per the Guide.
Anyway, when you did initiate that manual recording by pushing REC while you were watching "live" TV, however long the current recording buffer is and however much you have in it (up to the max of 30 minutes of HD, but it could be less if you only recently just tuned to that channel, watched it for a while, and decided you'd like to record it) is changed on hard drive from its current status of "temporary unnamed recording buffer up to the last 30 minutes" to become the beginning of the newly properly named (according to the program info in the Guide) recording. And new ongoing continuing "live" TV is added after that on hard drive and continues normally.
You actually still do have that very same "sliding 30-minute" recording buffer even when you're truly doing this manually initiated recording of "live" TV, but it's just that instead of working in a general unnamed temporary recording buffer, you're actually looking at the past 30-minutes of your newly accumulating named recording of that program on your hard drive.
So, what you end with in your "named recording" when the program ends (or whenever you might manually choose to STOP that recording by pushing the STOP button on the remote while the recording tuner is in the foreground and its program is shown on your screen) always begins with however large that initial recording buffer was when you first pushed REC. If it was the full 30-minutes and "sliding", you'll get those most recent 30 minutes at the front of your named recording. If the buffer was something less than that 30 minutes, then that's all you'll get at the start of that named recording.
And, however long the rest of the program is per the Guide, that will define the end time for the automatic STOP (recording) to kick in, exactly as if you'd previously scheduled the program to be recorded.
So the final named recording will include the sum of (a) however much was in the recording buffer at the moment you pushed REC, up to a max of 30 minutes since that's the limit of the recording buffer, followed by (b) as much remaining there is in the program per the Guide info. It's exactly like a pre-scheduled recording at its upper end, automatically stopping exactly the same way. You've simply initiated the recording start manually by pushing the REC button, at which time however large the current existing recording buffer is becomes the front of your named recording to start. New "live" recording then goes onto hard drive right after that current recording buffer content used to start the named recording.Edited by DSperber - 9/5/12 at 4:02pm