Recording a Still Image

1465 Views 7 Replies 3 Participants Last post by ebonovic, Jan 11, 2006

mboge

Discussion Starter · Jan 9, 2006

How much space does it take up to record a still picture (with music in the background)?

I'd like to set up an Auto-Record wishlist for my NBA team, but the League Pass channels have the games scheduled for a 6-hour block. As 99% of games are over in three hours, I end up setting up manual recordings of 3-hours to save disk space. (When the game is over, the NBA channel just shows a DirecTV logo and plays music in the background).

IIRC, MPEG stores information about "changes" in the frames rather than the entire frame info, so shouldn't a still picture really have a minimal impact on disk space?

Any clues?

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ebonovic

· #2 · Jan 10, 2006

The video stream is still going to contain a small video stream... It is about every 4 or so frames (I-Frames)

But what is going to happen is the first part of the game is going to not be as compressed (due to sports and live action) so any savings that you would gain on the backend... will be ost.

I would figure at least 5 hours on the hard drive..

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mboge

Discussion Starter · #3 · Jan 10, 2006

Thanks.

I guess what I should have really asked is what would be impact of recording 3 hours of a still image (since I still record the first 3-hours, anyway, and the final 3 hours of the scheduled time slot is nothing more than a still image).

I understand that an hour of news is different than an hour of football from a hard disk perspective, but how much different? And then, how much different would a hour of news be from an hour of a still image?

Thanks, again.

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ebonovic

· #4 · Jan 10, 2006

News would be larger then the still image

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mboge

Discussion Starter · #5 · Jan 10, 2006

Right... but how much? Say 100%, 200%? Sorry for the repeated questions, but disk space is at a premium right now but I'm also sick and tired of having to manually record every NBA game I want to watch.

I figure if a 3 hour still-image takes up the same disk space as a half-hour sit-com, then I can afford the space and I'll go ahead and auto-record that wishlist. But, if it's more like a 2-hour movie, then I'll continue to manually record.

Thanks.

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ebonovic

· #6 · Jan 10, 2006

Honestly.. there is no way to know unless we really really need to get into details (like bit rates and other things)

What size hard drive do you have in your unit? If you are at all good with PC parts, you can upgrade your TiVo to a 140hr unit for like $40 post rebate (a 160gb hard drive)

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Want1394

· #7 · Jan 11, 2006

Earl, you're on the wrong track here. DirecTV sets the bit rate on a per channel basis (yes, I am aware you know that very well) and, if it's a sports channel, doesn't change that rate even if they are only showing a logo. The compression isn't dynamic at all. S0, if it's at one of the higher rates DirecTV uses for sports (it should be), then it likely stays at that same bit rate until the next game.

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ebonovic

· #8 · Jan 11, 2006

Want1394 said:
Earl, you're on the wrong track here. DirecTV sets the bit rate on a per channel basis (yes, I am aware you know that very well) and, if it's a sports channel, doesn't change that rate even if they are only showing a logo. The compression isn't dynamic at all. S0, if it's at one of the higher rates DirecTV uses for sports (it should be), then it likely stays at that same bit rate until the next game.

Ooohhhh I hate mixing up VBR and CBR.......

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