DATV Easy 2.17 First duplex DATV codec H266

F1EJP · Apr 13th 2023

Yesterday a first:

First QSO Duplex DAVT on QO100 between F1EJP and ON1RC in H266 VVC encoding with DATV-Easy 2.17 Beta

73 Dominique F1EJP

DL5OCD · Apr 13th 2023

Congratulations to both of you!

Today i build a software which can decode H266 and decoded ON1RC@66KS very good. It is a 64bit version for Windows.

This is really a nice innovation.

73

Michael

DL5OCD

DD4YR · Apr 14th 2023

Quote from F1EJP

First QSO Duplex DAVT on QO100 between F1EJP and ON1RC in H266 VVC encoding with DATV-Easy 2.17 Beta

Congrats!

Some info about latency and CPU / GPU load ?

73 de Robert

F1EJP · Apr 15th 2023

Hello

This new compression will reduce the video stream by 50% for the same quality and therefore the bandwidth occupied.

It is a future compression standard for 4K 8K television.

The first televisions equipped with a decoding chip should be released this year !

For the moment the H266 only works in soft coding because there is not yet a graphic card which supports it.

CPU load goes from 60 to 100%

for the moment it is necessary to limit to a small flow and fps

The latency is about 15 seconds.

If you want to test in reception and give a report download the files below. You must unzip the folder on the desktop and if necessary modify the ip and the port in the .bat file to correspond to the udp output of the Minitiouner

and launch the .bat corresponding to the desired definition.

http://www.vivadatv.org/viewtopic.php?f=84&t=1002

73 Dominique F1EJP

PA3AOD · Apr 15th 2023

Hi Dominique,

But with which CPU (I3 - I9)?

Bert PA3AOD

DL5OCD · Apr 15th 2023

Hi,

I followed Chris and Dominique during their tests with H266 the last days.

I compiled a 64bit version (with H266 support) for Windows, maybe you might also check it out.

It is based on ffmpeg 6.

The documentation is included, also the ffmpeg.exe when you wanna try to TX in H266.

The CPU-load on my i9 12th gen stays below 5% while decoding with ffplay, it seems you need much more CPU performance when you try to encode during TX.

https://drive.google.com/file/…fBLFtWfJ/view?usp=sharing

73

Michael

DL5OCD

iu4gav · Apr 15th 2023

hello, is it a version only for rx, or also for tx?

DL5OCD · Apr 15th 2023

This version is for RX and TX.

iu4gav · Apr 15th 2023

OK thank you! alora I have to figure out how to go to tx!

F1EJP · Apr 15th 2023

Hello,

The new DATV-Easy 2.17 is made with ffmpeg 6 !

It will avaible soon for your test !

The script which I give the link for decoding is made with ffplay (ffmpeg 6)

A plugin exist also for VLC

For VVC H266 the minimum CPU seem a old I5

ON1RC test the limit of the CPU I5 98 %

For me between 60 and 100% with a old I7

Please note that the software coding remains experimental and is not yet as good as the H265, it is limited in speed and fps by the power of the cpu.

Its quality can still be improved.

73 Dominique F1EJP

iu4gav · Apr 15th 2023

ok perfetto, appena disponibile proverò anche il mio i9 13th!

F1EJP · Apr 15th 2023

Thank you yes it will be interesting to see the possibilities with an I9

DL5OCD · Apr 16th 2023

My mainboard allows to upgrade to i9 13th gen...i am thinking abt it, too.

By the way, i uploaded a new version with extended menu:

----------------------

|------ Scaling ------|

|---------------------|

| 0 : Original |

| 1 : 930x522 |

| 2 : 1280x720 |

| 3 : 1980x1080 |

| 4 : 2560x1440 |

----------------------

Please, choose your scaling for the video (0,1,2,3,4) :

https://drive.google.com/file/…fBLFtWfJ/view?usp=sharing

iu4gav · Apr 16th 2023

okay! downloaded! Tnx!

DL5OCD · Apr 17th 2023

Uploaded V05 Beta, with support for up to 3 receivers.

https://drive.google.com/file/…fBLFtWfJ/view?usp=sharing

73

Michael

DL5OCD

DL5OCD · Apr 18th 2023

Hi,

i tested H266 to very high SR`s, 1000KS and maybe more is no problem.

The problem i have is the (at the moment unstable) decoder ffplay V6. It looses sync at higher SR`s and throws error messages. It might be also an issue with linear buffers (timesync) on TX side, i look deeper into it soon.

But it works. The last decoder i had compiled seems more stable, but there is still an issue.

Working on that...keep you informed.

But the good news is that H266 is working well on performant systems.

73

Michael

DL5OCD · Apr 19th 2023

Hello,

i extended the functionality to enable TX - also with H.266. Please note that this is an early development, highly experimental and it is not working perfect.

For TX/RX it is a frontend for FFMPEG.

I have tested H.266 up to 1000KS, it is more or less working. But that depends on your Hardware! I recomment to start with low SR`s (66, 125 or 250KS). A good choice to start is 125KS FEC 9/10 QPSK FPS 15. You are able to adjust every singele parameter for ffmpeg within the scripts, so you can optimize and extend functions by yourself since it is completely open.

Details you can find in the README.txt that is included.

Happy experimenting!

PS: I call this software DATV-NotSoEasy :-)))))

Download: https://drive.google.com/file/…fBLFtWfJ/view?usp=sharing

73

Michael

DL5OCD

2E0ILY · Apr 19th 2023

Thanks for your work on this and your decision to share it.

Why do I need a "Virtual Audio Cable" now to TX in H266 whereas I have never installed nor used one previously please?

My past experience of virtual audio cables has been very negative and full of problems. Thanks again Michael.

DL5OCD · Apr 19th 2023

Hi Chris,

this is the way how it works atm. Maybe it is possible that you find another way to grab the audio, the VC-Plugin and ffmpeg is able to do so. I have never had a problem with the VAC, it is stable on my side...

With newer versions of OBS >28 you do not need an external VC-Plugin, it should work out of the box. But i have not tested it so far, just heared abt it.

73

Michael

2E0ILY · Apr 19th 2023

OK thanks for the reply Michael.

DATV Easy 2.17 First duplex DATV codec H266

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