Mailing List Archive: MythTV: Mythtvnz

Idle Query - what resolution is Prime on Freeview HD?

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nick.rout at gmail

Oct 5, 2009, 8:32 PM

Post #1 of 8 (1592 views)
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Idle Query - what resolution is Prime on Freeview HD?

Subject says it all :)

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dylan at deedums

Oct 5, 2009, 8:43 PM

Post #2 of 8 (1535 views)
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Re: Idle Query - what resolution is Prime on Freeview HD? [In reply to]

I'm not in front of my TV at the moment, but from memory it's 576i.
That's tuned from Kaukau in Wellington, but I assume it's the same
everywhere.

Dylan

On Tue, 2009-10-06 at 16:32 +1300, Nick Rout wrote:

> Subject says it all :)
>
> _______________________________________________
> mythtvnz mailing list
> mythtvnz [at] lists
> http://lists.ourshack.com/mailman/listinfo/mythtvnz
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tortise at paradise

Oct 5, 2009, 9:01 PM

Post #3 of 8 (1543 views)
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Re: Idle Query - what resolution is Prime on Freeview HD? [In reply to]

----- Original Message -----
From: "Nick Rout" <nick.rout [at] gmail>
To: "MythTV in NZ" <mythtvnz [at] lists>
Sent: Tuesday, October 06, 2009 4:32 PM
Subject: [mythtvnz] Idle Query - what resolution is Prime on Freeview HD?

Subject says it all :)

_______________________________________________

Howdy Nick

One easy way to find out is to play it live - or play a recording in VLC - which will play it at its native resolution for any
particular recording. Its file information will give detailed and perhaps helpful codec information for both video and audio.

I am not sure if mplayer does this so easily.

I do not know however the different programs might be at different resolutions, although the bandwidth may not be there to support
more than 576i.

My observations of DVB-T Prime ("HD" is likely misleading in the title - but then I am not sure you will find an official source
that expresses it that way?) is its quality is superior to SD Prime analogue, however analogue Prime was always inferior to TV3
(which was for me always the best analogue quality).

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steven at openmedia

Oct 5, 2009, 9:22 PM

Post #4 of 8 (1543 views)
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Re: Idle Query - what resolution is Prime on Freeview HD? [In reply to]

On Tue, October 6, 2009 4:43 pm, Dylan Hall wrote:
> I'm not in front of my TV at the moment, but from memory it's 576i.
> That's tuned from Kaukau in Wellington, but I assume it's the same
> everywhere.
>

Video is 720x576 interlaced flagged as 16:9 in the same way as the
freeview MPEG2 satellite stream.

Steve

--------------------------------------------
Steven Ellis - Technical Director
OpenMedia Limited - The Home of myPVR
email - steven [at] openmedia
website - http://www.openmedia.co.nz

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nick.rout at gmail

Oct 5, 2009, 11:51 PM

Post #5 of 8 (1522 views)
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Re: Idle Query - what resolution is Prime on Freeview HD? [In reply to]

On Tue, Oct 6, 2009 at 5:01 PM, <tortise [at] paradise> wrote:
> ----- Original Message -----
> From: "Nick Rout" <nick.rout [at] gmail>
> To: "MythTV in NZ" <mythtvnz [at] lists>
> Sent: Tuesday, October 06, 2009 4:32 PM
> Subject: [mythtvnz] Idle Query - what resolution is Prime on Freeview HD?
>
>
> Subject says it all :)
>
> _______________________________________________
>
> Howdy Nick
>
> One easy way to find out is to play it live - or play a recording in VLC - which will play it at its native resolution for any
> particular recording. �Its file information will give detailed and perhaps helpful codec information for both video and audio.
>

I don't have freeview|HD so thats why it was an "idle query" :)

I was debating with someone whether they got topgear in HD via freeview.

Out if similar interest, what channels on Sky are really HD?

> I am not sure if mplayer does this so easily.
>
> I do not know however the different programs might be at different resolutions, although the bandwidth may not be there to support
> more than 576i.
>
> My observations of DVB-T Prime ("HD" is likely misleading in the title - but then I am not sure you will find an official source
> that expresses it that way?) is its quality is superior to SD Prime analogue, however analogue Prime was always inferior to TV3
> (which was for me always the best analogue quality).
>
>
> _______________________________________________
> mythtvnz mailing list
> mythtvnz [at] lists
> http://lists.ourshack.com/mailman/listinfo/mythtvnz
> Archives http://www.gossamer-threads.com/lists/mythtv/mythtvnz/
>

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jonathan.hoskin at gmail

Oct 6, 2009, 1:14 AM

Post #6 of 8 (1517 views)
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Re: Idle Query - what resolution is Prime on Freeview HD? [In reply to]

>
>
> One easy way to find out is to play it live - or play a recording in VLC -
> which will play it at its native resolution for any
> particular recording. Its file information will give detailed and perhaps
> helpful codec information for both video and audio.
>
> I am not sure if mplayer does this so easily.
>
> I do not know however the different programs might be at different
> resolutions, although the bandwidth may not be there to support
> more than 576i.
>
> My observations of DVB-T Prime ("HD" is likely misleading in the title -
> but then I am not sure you will find an official source
> that expresses it that way?) is its quality is superior to SD Prime
> analogue, however analogue Prime was always inferior to TV3
> (which was for me always the best analogue quality).
>
>
Just for the record, I just ran some DVB-T Prime samples in VLC. Even though
I agree it isn't actually HD, it does have a fairly decent bitrate ( ~
3000kb/s ) given the codec and resolution.

Certainly helps with disk space compared to TV3 recordings.

Jonathan

stephen_agent at jsw

Oct 6, 2009, 2:05 AM

Post #7 of 8 (1522 views)
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Re: Idle Query - what resolution is Prime on Freeview HD? [In reply to]

On Tue, 6 Oct 2009 16:32:05 +1300, you wrote:

>Subject says it all :)

This is what MediaInfo reports about the last episode of Sea Patrol
(which looks like it is recorded in HD, even if it is not being
broadcast in HD on Prime):

Format : MPEG-TS
File size : 1.24 GiB
Duration : 1h 4mn
Overall bit rate : 2 740 Kbps

Video
ID : 48 (0x30)
Menu ID : 137 (0x89)
Format : AVC
Format/Info : Advanced Video Codec
Format version : Version 2
Format profile : Main [at] L3
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Duration : 1h 4mn
Maximum bit rate : 3 314 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16/9
Frame rate : 25.000 fps
Standard : PAL
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Interlaced
Scan order : Top Field First

Audio
ID : 64 (0x40)
Menu ID : 137 (0x89)
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : Layer 2
Duration : 1h 4mn
Bit rate mode : Constant
Maximum bit rate : 108 Kbps
Video delay : -1s 517ms
Language : English

For comparison, this is from CSI New York (TV3, HD):

Format : MPEG-TS
File size : 5.79 GiB
Duration : 1h 4mn
Overall bit rate : 12.8 Mbps

Video
ID : 48 (0x30)
Menu ID : 137 (0x89)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High [at] L4
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Duration : 1h 4mn
Maximum bit rate : 13.3 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16/9
Frame rate : 25.000 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Interlaced
Scan order : Top Field First

Audio #1
ID : 64 (0x40)
Menu ID : 137 (0x89)
Format : AAC
Format/Info : Advanced Audio Codec
Duration : 1h 4mn
Maximum bit rate : 144 Kbps
Video delay : -345ms
Language : English

Audio #2
ID : 65 (0x41)
Menu ID : 137 (0x89)
Format : AC-3
Format/Info : Audio Coding 3
Duration : 1h 4mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Maximum bit rate : 432 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Surround: L R, LFE
Sampling rate : 48.0 KHz
Video delay : -444ms
Stream size : 178 MiB (3%)
Language : English

Note the use of High [at] L4 H.264 profile for CSI, versus Main [at] L3 for
Sea Patrol. Main profile is still pretty good at compression, but is
easier on decoders as it requires less computation. High [at] L4 is
using almost all possible compression techniques available in H.264.
And the HD broadcast uses 4 times the number of bits, although it has
only 2.5 times the number of pixels to display.

And this is from Piha Rescue (720p) on TV One, which I believe is
videoed in HD these days:

Format : MPEG-TS
File size : 2.67 GiB
Duration : 35mn 13s
Overall bit rate : 10.8 Mbps

Video
ID : 48 (0x30)
Menu ID : 137 (0x89)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main [at] L4
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Duration : 35mn 13s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16/9
Frame rate : 50.000 fps
Standard : Component
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive

Audio
ID : 64 (0x40)
Menu ID : 137 (0x89)
Format : AAC
Format/Info : Advanced Audio Codec
Duration : 35mn 12s
Video delay : -343ms
Language : English

Text #1
ID : 80 (0x50)
Menu ID : 137 (0x89)
Format : DVB Subtitles
Language : English

Text #2
ID : 105 (0x69)
Menu ID : 137 (0x89)
Format : Teletext
Language : English

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steven at openmedia

Oct 6, 2009, 3:09 AM

Post #8 of 8 (1524 views)
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Re: Idle Query - what resolution is Prime on Freeview HD? [In reply to]

On 6/10/2009, at 7:51 PM, Nick Rout wrote:

> On Tue, Oct 6, 2009 at 5:01 PM, <tortise [at] paradise> wrote:
>> ----- Original Message -----
>> From: "Nick Rout" <nick.rout [at] gmail>
>> To: "MythTV in NZ" <mythtvnz [at] lists>
>> Sent: Tuesday, October 06, 2009 4:32 PM
>> Subject: [mythtvnz] Idle Query - what resolution is Prime on
>> Freeview HD?
>>
>>
>> Subject says it all :)
>>
>> _______________________________________________
>>
>> Howdy Nick
>>
>> One easy way to find out is to play it live - or play a recording
>> in VLC - which will play it at its native resolution for any
>> particular recording. Its file information will give detailed and
>> perhaps helpful codec information for both video and audio.
>>
>
> I don't have freeview|HD so thats why it was an "idle query" :)
>
> I was debating with someone whether they got topgear in HD via
> freeview.
>
> Out if similar interest, what channels on Sky are really HD?

TV One/2/3 are the same level of HD as they are on Freeview.

The other "HD" sky channels are Sky Sports , Sky Moves and Sky Movies
Greats, but some of the material will be upscaled SD like Freeview.

Steven Ellis - Technical Director
OpenMedia Limited
email - steven [at] openmedia
website - http://www.openmedia.co.nz

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