GTMedia GTCombo 4:2:2 receiver

[Offtensive]

The SF8008 can provide a picture of a 4:2:2 signal by routing the signal to IP as an mmu file or some similar type of extension. The kodi app in the SF8008 then connects internally to the mmu file and clears it.
Octagon provided a set of screenshots on the forum a while ago on how to do this.

Was the performance watchable on the octagon using that method?

 

[moonbase]

Was the performance watchable on the octagon using that method?

Not tried it and unfortunately do not have an SF8008 directly to hand at the moment to give it a test.
There are a few members with the SF8008, hopefully one of them can test it out?

 

[Manikm909]

Installation via Telnet:
opkg install kodi-addon-pvr-vuplus
install pvr client

Start Kodi and enter the SF8008's IP address in the E2 client.

"scan tp 422, you have in the e2 ch list, start kodi, open pvr Client, they Show automaticly the ch list include 422 feed channels"

Have fun!

 

[gafsa]

 

[Dave5118]

So, is the GT Media box better with 4.2.2 based on newer components inside...

Probably only a more powerful cpu, android boxes have been able to decode 4:2:2 for some time now, using certain media players, but only really low bitrates and mpeg 2 based files. They use the same technique as PCs, but the cpus are much inferior in speed. It was only a matter of time cpu's got quick enough to do h264 4:2:2. But I would guess they will only be useful up to a certain bitrate for now, so feeds that it is struggling with now, will always be a struggle.
Seems the main party trick of this box, is it can play 4:2:2 feeds 'live'.

 

[scopus]

Not tried it and unfortunately do not have an SF8008 directly to hand at the moment to give it a test.
There are a few members with the SF8008, hopefully one of them can test it out?

I couldn't get it to work, but that was some time back..

 

[John]

Probably only a more powerful cpu, android boxes have been able to decode 4:2:2 for some time now, using certain media players, but only really low bitrates and mpeg 2 based files. They use the same technique as PCs, but the cpus are much inferior in speed. It was only a matter of time cpu's got quick enough to do h264 4:2:2. But I would guess they will only be useful up to a certain bitrate for now, so feeds that it is struggling with now, will always be a struggle.
Seems the main party trick of this box, is it can play 4:2:2 feeds 'live'.

I think that sums it up nicely
It's the simplicity of it to give you a rudimentary view of 4:2:2 , BISS, and fairly inexpensive cost of the machine that is probably the attraction for a lot of people to acquire this machine - if development continues then hopefully it will go from strength to strength

 

[Offtensive]

Try an online bandwidth calculator using 16APSK with a 33333 symbol rate, depending on the FEC over 100Mbps is possible..

Does anyone know how to workout the bottom 3 starred fields?

 

[moonbase]

If you have the option to scan the frequency into EBS Pro it normally registers those parameters.
What satellite and frequency was the info taken from?

 

[william-1]

This just jogged my memory, back back in the day i used to use a Quali tv receiver for mpeg2 4:2:2 i think it was adequate

Yes, just a shame that the technology did not keep up to date my AZBox P+ was redundant for feeds at the end of the day I did have 4 years of very good feed hunting with it

 

[rodscha]

just a question
and what is 4:2:2?

 

[Channel Hopper]

Probably only a more powerful cpu, android boxes have been able to decode 4:2:2 for some time now, using certain media players, but only really low bitrates and mpeg 2 based files. They use the same technique as PCs, but the cpus are much inferior in speed. It was only a matter of time cpu's got quick enough to do h264 4:2:2. But I would guess they will only be useful up to a certain bitrate for now, so feeds that it is struggling with now, will always be a struggle.
Seems the main party trick of this box, is it can play 4:2:2 feeds 'live'.

I doubt GTMedia is fitting state of the art processors, moreso for the price the combo is selling for, but best of luck to those here receiving the first off the production line.

Perhaps somebody can pull the lid off both tuner cans and take some pictures for the forum.

 

[ozumo]

just a question
and what is 4:2:2?

It's called chroma subsampling - 4:2:2 contains twice as much colour (chroma) information as 4:2:0 (4:2:0 is used in all consumer digital television broadcasts)

Chroma subsampling - Wikipedia

en.m.wikipedia.org

 

[rodscha]

so basically it s the US color tv system? the old NTSC?
In what way is it interesting to receive it?

 

[ozumo]

No. Imagine a 4x2 block of pixels. 4:2:0 means in the 4 pixels in the first row there are 2 with chroma (colour) information, the 4 pixels below on the next line have 0 colour information. 4:2:2 has an extra 2 pixels of colour information on the second row.

4:2:0 means on a 4K frame there are 3840x2160 pixels, each with luminance (brightness/black&white) information and 1920x1080 pixels of chrominance (colour) spread over the top. Standard 4:2:0 4K video only contains 1080p worth of colour! 1080p video contains 960x540 pixels of colour information.

A 4:2:2 4K frame would contain 1920x2160 pixels of colour - twice as much as a 4:2:0 frame.

4:2:0 video = quarter of pixels have colour information
4:2:2 video = half of pixels contain colour.

 

[Manikm909]

Yes, just a shame that the technology did not keep up to date my AZBox P+ was redundant for feeds at the end of the day I did have 4 years of very good feed hunting with it

soooo sloooow tho

 

[Manikm909]

No. Imagine a 4x2 block of pixels. 4:2:0 means in the 4 pixels in the first row there are 2 with chroma (colour) information, the 4 pixels below on the next line have 0 colour information. 4:2:2 has an extra 2 pixels of colour information on the second row.

4:2:0 means on a 4K frame there are 3840x2160 pixels, each with luminance (brightness/black&white) information and 1920x1080 pixels of chrominance (colour) spread over the top. Standard 4:2:0 4K video only contains 1080p worth of colour! 1080p video contains 960x540 pixels of colour information.

A 4:2:2 4K frame would contain 1920x2160 pixels of colour - twice as much as a 4:2:0 frame.

4:2:0 video = quarter of pixels have colour information
4:2:2 video = half of pixels contain colour.

u know your shizzle mate

 

[John]

I doubt GTMedia is fitting state of the art processors, moreso for the price the combo is selling for, but best of luck to those here receiving the first off the production line.

Perhaps somebody can pull the lid off both tuner cans and take some pictures for the forum.

Not easy but here's a quick look. Not tuner cans as such, all on the pcb with a cover lid over the tuner section. Struggled to get the terrestrial tuner chip
.......................................................................................................................................................................................................................................................................................................................................................................

 

[Channel Hopper]

That really is a badly placed heatsink.......

Carefully remove, clean off the old adhesive and glue back with good stuff (taking pictures of all surfaces as you progress ).

 

[Manikm909]

who would do that!