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COM8 running - has PIDs |
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#51 |
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Forum Member
Join Date: Jan 2007
Posts: 61
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I can tune this from WH - hearing the audio, no video. Video is 36Mbits. Using Windows.
Have T2 stick but don't know how to use it on linux. Linux is useless for desktop - nothing works. |
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#52 |
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Forum Member
Join Date: Feb 2003
Posts: 1,256
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Quote:
... Have T2 stick but don't know how to use it on linux. Linux is useless for desktop - nothing works.
Yes, none of the desktops are the same as MS Windows and maybe aren't as user friendly as Windows 7* for someone with experience of windows - which is almost all of us - but there is power in the linux distributions there if you want it. I wouldn't have a clue how to script the sort of automated freeview mux tests that my media pc machine runs reliably for months on end if it was restricted to windows. * but they are probably more friendly than Windows 8... |
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#53 |
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Forum Member
Join Date: Apr 2006
Posts: 1,395
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Quote:
I can confirm that I am getting a strong signal on UHF ch 35 from Crystal Palace.
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#54 |
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Forum Member
Join Date: Dec 2008
Location: East Midlands
Posts: 5,204
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Anyone on Black Hill in Scotland seeing the tests?
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#55 |
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Forum Member
Join Date: Oct 2002
Location: West Sussex (Crystal Palace)
Posts: 3,377
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Quote:
Yep, well as strong as Com7 anyway.
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#56 |
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Forum Member
Join Date: Jun 2002
Posts: 13,766
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Wonder what channel COM8 will be on from Divis and if any tests have started yet...?
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#57 |
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Forum Member
Join Date: Feb 2004
Location: London
Posts: 7,514
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I would expect that only the transmitters serving BBC R&D would be illuminated ....
And maybe use IP as well as MPEG TS PLPs . |
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#58 |
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Forum Member
Join Date: Jul 2003
Location: Essex
Posts: 3,858
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Quote:
I would expect that only the transmitters serving BBC R&D would be illuminated ....
And maybe use IP as well as MPEG TS PLPs . Don't get excited everybody - this is not COM8 launch.... |
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#59 |
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Forum Member
Join Date: Jun 2014
Posts: 1
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I was able to play a recording from COM8 Crystal Palace. I wrote a bit about it here:
http://www.obe.tv/about-us/obe-blog/...st-look-at-bbc |
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#60 |
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Forum Member
Join Date: Oct 2002
Location: West Sussex (Crystal Palace)
Posts: 3,377
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That is one of the most impressive first posts I have seen - brilliant.
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#61 |
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Forum Member
Join Date: Jul 2003
Location: Essex
Posts: 3,858
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Quote:
I was able to play a recording from COM8 Crystal Palace. I wrote a bit about it here:
http://www.obe.tv/about-us/obe-blog/...st-look-at-bbc ![]() Amazing detail of the pigeon poo on that street lamp in that screencap! |
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#62 |
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Forum Member
Join Date: Feb 2003
Posts: 1,256
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Quote:
I was able to play a recording from COM8 Crystal Palace. I wrote a bit about it here:
http://www.obe.tv/about-us/obe-blog/...st-look-at-bbc |
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#63 |
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Forum Member
Join Date: Dec 2008
Location: East Midlands
Posts: 5,204
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Quote:
Agree - it'll almost certainly be CP & WH only.
... http://www.bbc.co.uk/rd/blog/2014/06...inition-trials |
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#64 |
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Forum Member
Join Date: Dec 2012
Posts: 3,457
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Presumably this will allow viewings at BH, Salford Quays and Pacific Quay.
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#65 |
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Forum Member
Join Date: Feb 2003
Posts: 1,256
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Just as a follow on to post #2, I've updated to the latest release build of mediainfo and this build does identify PID 101 as HEVC:
Code:
General ID : 61440 (0xF000) Complete name : com8.wh.ts Format : MPEG-TS File size : 289 MiB Duration : 1mn 0s Start time : UTC 2014-06-22 18:26:04 End time : UTC 2014-06-22 18:27:03 Overall bit rate mode : Constant Overall bit rate : 40.1 Mbps Network name : Test Original network name : UK Digital Terrestrial Television Country : GBR Timezone : +01:00:00 Video ID : 101 (0x65) Menu ID : 61440 (0xF000) / 61504 (0xF040) Format : HEVC Format/Info : High Efficiency Video Coding Codec ID : 36 Duration : 1mn 0s Audio ID : 102 (0x66) Menu ID : 61440 (0xF000) / 61504 (0xF040) Format : AAC Format/Info : Advanced Audio Codec Format profile : LC Muxing mode : LATM Codec ID : 17 Duration : 1mn 0s Bit rate mode : Variable Channel(s) : 2 channels Channel positions : Front: L R Sampling rate : 48.0 KHz Compression mode : Lossy Delay relative to video : -577ms Language : English Menu #1 ID : 100 (0x64) Menu ID : 61440 (0xF000) List : 101 (0x65) (HEVC) / 102 (0x66) (AAC, English) Language : / English Service name : Test Service type : reserved for future use UTC 2014-06-22 00:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 01:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 02:00:00 : en: / en: / / / 01:00:00 / <snipped 11 lines> UTC 2014-06-22 15:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 16:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 17:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 18:00:00 : en: / en: / / / 01:00:00 / Running UTC 2014-06-22 19:00:00 : en: / en: / / / 01:00:00 / Not running UTC 2014-06-22 20:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 21:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 22:00:00 : en: / en: / / / 01:00:00 / <snipped many lines> UTC 2014-06-29 21:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-29 22:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-29 23:00:00 : en: / en: / / / 01:00:00 / Menu #2 ID : 200 (0xC8) Menu ID : 61504 (0xF040) List : 101 (0x65) (HEVC) / 102 (0x66) (AAC, English) Language : / English Service name : Test. Service type : reserved for future use UTC 2014-06-22 00:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 01:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 02:00:00 : en: / en: / / / 01:00:00 / <snipped 12 lines> UTC 2014-06-22 15:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 16:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 17:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 18:00:00 : en: / en: / / / 01:00:00 / Running UTC 2014-06-22 19:00:00 : en: / en: / / / 01:00:00 / Not running UTC 2014-06-22 20:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-22 21:00:00 : en: / en: / / / 01:00:00 / <snipped many lines> UTC 2014-06-29 17:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-29 18:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-29 19:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-29 20:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-29 21:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-29 22:00:00 : en: / en: / / / 01:00:00 / UTC 2014-06-29 23:00:00 : en: / en: / / / 01:00:00 / Code:
ffmpeg -i /tmp/com8.ts -f image2 -vf fps=fps=1/10 /tmp/img%01d.png |
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#66 |
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Forum Member
Join Date: Nov 2003
Location: Cambridge, UK
Posts: 1,774
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I'm disappointed to see that while the video is HEVC, the audio is only stereo.
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#67 |
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Forum Member
Join Date: Mar 2013
Location: south west
Posts: 9,914
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Quote:
I'm disappointed to see that while the video is HEVC, the audio is only stereo.
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#68 |
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Forum Member
Join Date: Nov 2003
Location: Cambridge, UK
Posts: 1,774
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Quote:
I guess that they dont need to test the audio though, so its simpler to just stick stereo on, as this test is all about the picture!
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#69 |
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Forum Member
Join Date: Feb 2003
Posts: 1,256
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Quote:
It makes the test less valid in my view. No broadcaster except ITV would be dumb enough to broadcast a UHD service with stereo audio.
I'll try to take a look at the stream during the test on Saturday and report back what it looks like then. |
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#70 |
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Forum Member
Join Date: Aug 2005
Posts: 68,698
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Quote:
It makes the test less valid in my view. No broadcaster except ITV would be dumb enough to broadcast a UHD service with stereo audio.
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#71 |
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Forum Member
Join Date: Apr 2006
Posts: 1,395
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I would say that if the video is an unknown then "simple audio" would be a quick way to tell that everything is set up properly. Once the video has been proven then they can just switch the audio.
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#72 |
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Forum Member
Join Date: Apr 2006
Posts: 1,395
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Quote:
I've also figured out how to extract frames from the HEVC video using a very recent build of ffmpeg and can see the same sort of image that Kieran_K reported. If anyone else wants to replicate it, use something like:
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#73 |
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Forum Member
Join Date: Mar 2006
Location: Newcastle-upon-Tyne
Posts: 8,175
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Nothing on COM8 from Pontop Pike today.
What sort of CPU power are we going to need to decode HEVC, given that current video-cards don't have the dedicated hardware to do most of the work. AVC is doable at 1920x1080 on a good dual-core CPU even without GPU support, but I imagine 1080p HEVC requires rather more work and current graphics cards won't be able to offload much of it. Then a lot more horsepower will be needed for 4K HEVC. |
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#74 |
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Forum Member
Join Date: Oct 2002
Location: West Sussex (Crystal Palace)
Posts: 3,377
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Quote:
Nothing on COM8 from Pontop Pike today.
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#75 |
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Forum Member
Join Date: Feb 2003
Posts: 1,256
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Various new bits of info:
There is a new blog post following on from Kieran_K's previous one at http://www.obe.tv/about-us/obe-blog/...rld-cup-part-2 The nightly build of VLC ( http://nightlies.videolan.org ) can decode at least a frame of HEVC from the video stream on COM8 - and the prelease version of TSReader has some preliminary support for H265/HEVC. The development snapshot of mediainfo ( http://sourceforge.net/projects/medi...ots/0.7.69%2B/ ) has more detail on the video parameters: Code:
Video ID : 101 (0x65) Menu ID : 61440 (0xF000) / 61504 (0xF040) Format : HEVC Format/Info : High Efficiency Video Coding Format profile : Main@L5.1 Codec ID : 36 Duration : 59s 509ms Width : 3 840 pixels Height : 2 160 pixels Display aspect ratio : 16:9 Frame rate : 59.940 fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits |
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