OTA not in HD

[Melancholy Man]

I don't think my over the air tuner is recording in HD. The shows I record are at about 1 gigabytes per hour. Shouldn't that be from 3 to 5 gigabytes per hour?

[wnjj]

I don’t think the tuner can choose. OTA streams are whatever the station broadcasts and depend upon the compression level and content. I’ve notice all kinds of gB/hr over the years. When OTA first went digital they were 6-8gB/hr but have dropped since.

[jpwegas]

Originally Posted by Melancholy Man

I don't think my over the air tuner is recording in HD. The shows I record are at about 1 gigabytes per hour. Shouldn't that be from 3 to 5 gigabytes per hour?

Depends on the channel and show. If it's one of the "sub-channels" it might be a much lower bitrate (or not even HD).

--John

[Melancholy Man]

Ok I thought all broadcasters would be the same. It has been only one channel in particular I have noticed this.

[jpwegas]

Can you share the location and channel? For example, 20.2 in Washington DC or 2.1 in New York City?

--John

[JustFred]

It might also be useful to tell us which capture device (tuner) is involved. (Although we often enjoy a good mystery )

[wayner]

On a related note - don't some (or all) OTA tuners capture the entire channel, including all sub-channels? I swear that this used to be the case, at least for some tuners. But it wouldn't make sense for a 1GB/hr capture. I thought that a full OTA channel was 18Mb/s which was something like 8.1GB/hr.

18Mb/s x 0.125B/b x 3600s/hr x 0.001GB/MB= 8.1GB/hr (assuming that 1GB=1000MB)

[xjim1]

I think it just picks the desired transport stream from the channel, although I don't see why it couldn't record all sub channels for a given frequency. It's all packet switched, right? I still use a single tuner card and Sage won't allow me to record more than one sub at a time within a given physical channel.

To the OP, just look at the video detail for a given recording. It'll tell you the resolution.

It's been turning into a pet peeve of mine how broadcasters are slicing and dicing the available bandwidth. A lot of sub channels aren't even watchable anymore. I think I feel a rant coming. Nope, just gas.

[Melancholy Man]

I am recording channel 10.3 in Phoenix AZ. I am using a Colossus video card.

[KryptoNyte]

Originally Posted by Melancholy Man

I am recording channel 10.3 in Phoenix AZ. I am using a Colossus video card.

Wasn't ready for that answer. What tuner or viewing device is feeding the media to the Colossus? I believe Sage controls the recording bitrate of the Colossus from the properties file.

[xjim1]

Take a look:
https://rabbitears.info//market.php?...n=ksaz#station

H&I channel? 1GB/hr is about what I see on channel of the same name in my area.
What do you see for file sizes on 10.1?

[jpwegas]

Originally Posted by Melancholy Man

I am recording channel 10.3 in Phoenix AZ. I am using a Colossus video card.

From:
https://en.wikipedia.org/wiki/KSAZ-TV#Digital_channels

10.1 720p 16:9 Main KSAZ-TV programming / Fox
10.3 480i 16:9 Heroes & Icons
10.4 480i 16:9 Light TV

So around 1 GB/hour sounds about right. You might be able to adjust the capture quality on the Colossus, but even at max quality a 480i stream isn't going to be much more than that.

--John

[Malfunction]

I'm seeing a lot of local stations, especially "oldies" stations broadcasting in wide format 480p.