Sunday, August 22, 2010

digicorder and recording subsequent programs

Digital television is getting the norm in Belgium, and typically people rent a "digicorder" from the TV provider. This allows you to watch television and also record programs for later consumption.

In practice my family only records a few programs and watch them later. It's very convenient not to be bound to a specific schedule. (On the other hand it would probably be cheaper to just buy the DVD boxes of the series we like instead of having television at all, but that is another discussion :) ).

In general, the digicorder works fine, I have one big gripe with it though: recording of subsequent programs.

Lets say we're recording subsequent programs A and B from channel 0. Let's assume there is some advertisement in between programs. This gives as timescale something like this:



Now, there are three ways the digicorder can record the program, not counting the completely faulty ways when timing goes all wrong.

Both programs want to record a time-slice before and after their program, but this goes wrong in the middle, and only one recording ends up with the middle part.

correct


The correct recording is with the break point in the middle like this:



I presume there are not some kind of markers in between the broad-casted programs on commercial television because it makes their advertisement store even worse.

Therefor, in practice you typically end up with one if these two:

B in recording 1







This is problematic because if you don't remember not to erase recording 1 after watching program A, the start of program 2 will be lost.

A in recording 2







This is even worse. Lets say you want to watch program B first.

You first have to open recording 1, fast forward all the way to the start of program B, start watching and after a few minutes switch to recording 2. This will also leave recording 1 marked as "watched" even though you didn't watch program A yet. More confusion!

A simple solution


In the end this is a simple technical problem with an even simpler solution: record the overlap in a separate file and make it part of both recordings. Visual:



If you watch recording 1, you get recording 1 + X. If you watch recording 2, you get X + recording 2.

If you erase recording 1, X stays. Only if both recording 1 and recording 2 are erased, X gets deleted.

More in general there will be X areas both in front and at the end, etc...

Would be nice if the biggest TV provider of Belgium could implement this. If the digicorder was open source I would've done this already months ago...
I guess I'll have to look into some kind of MythTV like setup one day.
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