HDTV file size too big on FOX

[DonMilo]

When I record a show using my Avermedia HD A180, I noticed that the shows are about 8 gig per hour. This was fine until my friend pointed out that the shows on Fox and ABC are 720p and should only be 4 gigs or so. Is this correct? Could it be that my AverMedia is recording the sub channels also, so I'm recording both channels into one file?

Any ideas?

[cpmiv]

Yes all the sub channels are in the TS stream. You can pull out the other channels with 3rd party apps

[DonMilo]

Is there anyway to NOT record the sub channels? If I hide the sub channels in the Web interface, will it still record them or is this automatically recorded by the HDTV card?

[cpmiv]

With HD you aren't really "recording" like with SD. All you are doing is recieving the HD stream. Its all or nothing.

[Kilrsat]

The ATSC stream is roughly 19mbit/s regardless of resolution or content. The stream is filled with null packets if the actual content doesn't take all 19mb/s. So you will see 8GB/hr on all channels when recording the stream.

[merrypig]

. o O { Use the PIDs luke! }

[enigma9o7]

Something said here confused me, so I wanna make sure I understand right. If I "record" a SD (480i or whatever) show from a digital channel, does it take the same amount of disc space as a show that's broadcast HD (720p or 1080i, etc)?

[cpmiv]

If its on a ATSC channel yes.

You can strip out the individual show with a 3rd party app like this:
http://www.videohelp.com/tools?tool=629

It will be conciderably smaller disk space wise.

[Rich A]

I often archive my digital recordings. Yes, all "digital" transport streams run at about 8 gb per hour. 480 720 and 1080 included.