Playing a youtube video on a lap top which says the video is 4K high definition and then transferring it via a HDMI cable into a large 4K rated television, the result is not at all high definition. Am i missing something in expecting it to be high definition on the television?
Pre Covid, I was killing time while Senior Manage was shopping by looking at TVs etc in the electronics section of the same shop.
A salesman was demonstrating a 4k TV, as I recall by switching between blue ray and the same film on another play but DVD at a lower definition.
The TV was huge - far to large for our sitting room, which is far from small- yet I really needed to look to tell the difference. Certainly, if I was simply sitting down to watch a film or TV, rather than worrying about the picture, I wouldn?t notice.
It's possible the laptop can't send 4k over HDMI. It's likely its graphics card is only good enough to drive its internal screen.
What model?
Andy
My laptop can drive a 4K monitor over DisplayPort @ 29.97 fps, or over HDMI port at 30 fps, but neither port at 60 fps (actually an external USB3 dongle can drive DisplayPort at 60 fps, but the dongle crashes after a few minutes and the frame rate is lumpy.
Some machines are just too old to cope.
I have three fancy modern sets, able to properly display the HD TV channels. I usually compromise my TV watching wearing my reading glasses, so I see no improvements in watching the HD channels, versus the standard versions. I can certainly see the difference if I sit at 'reading distance' or wear my glasses of the correct diopter for TV watching.
What does the laptop report in Display Settings as the resolution of the TV ?
Obvious - but,
- Make sure windows display resolution is set to 4K.
- At the bottom of the youtube window shown in the browser is a gear cog where ye can select the 'Quality'. 2160p60 (4K) is what ye need.
- On your TV, you should find an info screen that shows what resolution and rate the TV is displaying.
- Adding make and model of components is vital to getting a proper reponse from usenet!
- What spec HDMI cable are ye using. Is there a switchbox in the way?
FWIW,
For comparison, at work I'm using a (Core i5-8350U Quad 1.7GHz / Intel UHD Graphics 620) based HP Elitebook 840 G5 onto an old 43" LG 4K screen via HDMI, on a very fast internet connection. Full screen, it drops frames at 4k@30Hz (display stats for nerds), but is watchable none the less.
A good youtube test clip that is very obvious 4K is
Sniper Will Smith (Gemini Man)
Thanks. its a Dell Inspiron and the label underneath says P25T and then P25T002
That might be the Inspiron 11 3179:
Max Resolution (HDMI)? 4096x2304@24Hz Max Resolution (DP)? 3840x2160@60Hz Max Resolution (eDP - Integrated Flat Panel)? 3840x2160@60Hz
? This feature may not be available on all computing systems. Please check with the system vendor to determine if your system delivers this feature, or reference the system specifications (motherboard, processor, chipset, power supply, HDD, graphics controller, memory, BIOS, drivers, virtual machine monitor-VMM, platform software, and/or operating system) for feature compatibility. Functionality, performance, and other benefits of this feature may vary depending on system configuration.
So you might be able to get 4K @ 24Hz or 30Hz out of the HDMI, but not 60Hz unless you go Displayport (which it appears this laptop doesn't have, nor USB-C).
In Windows settings -> display, see if you can adjust the display resolution to 3840x2160. You might have to adjust the frame rate lower to let you do that.
Hits for P25T also come up with the Inspiron 11 3169, which comes in a range of Intel and AMD CPU options:
Theo
1) URL of Youtube video ? 2) Exact make and model number of laptop ? 3) Exact make and model of TV set ?
Getting 4K to work, is about as hard as child birth. (On a scale of 1..10, about 11 or so.)
*******The following procedure, is if you have no honest-to-goodness 4K files to test with.
For a Windows tool that downloads bitranges, there are things like aria2. For slow download sites, you can decrease the download time using more connections and byterange downloads (each thread downloads a chunk). I used five connections to archive.org to download a Red Cinema camera sample video.
aria2c.exe -x5
In an ordinary Command Prompt window:
cd /d C:\users\username\Downloads\aria2c # The folder with the unpacked Aria2 ZIP file, # aria2c.exe is inside this folder.
# This is content removed from the red site, and saved as an upload to archive.org rather than # as a conventional archive. I only tried a few samples, and this one isn't bad as content goes. # Some of the others were dreadful and no good for test.
aria2c.exe -x5
Name: epicw8k-standard-24fps-7to1redcode_16x9.zip Size: 1,478,855,973 bytes (1410 MiB) # 7 seconds of a Hong Kong street at 8K resolution SHA1: 25950E5B437906F7983020C330FD4F5A3BEA1392
# You could also do that in a browser, at the provided URL. Some of the other samples are awful.
Right click the download and select "Install" from the top of the Windows menu.
To succeed at Exporting the "H004_C006_1211TB_001.R3D" file (1,479,311,360 bytes), there are some tricks. RedCine-X Pro is an editor, and requires the clip to be dropped into the Timeline, then selected, before you can Export on the upper right. The Export profile is "Unnamed" and in there, you can switch to the JPEG option. There is a separate small menu for setting JPEG quality to 100 percent.
[Picture] If frame is blank, right-click and select "Reload"Sequence 01.0000152.jpg 28,100,518 bytes
Drop ffmpeg.exe into folder with JPEG files
Name: ffmpeg.exe Size: 121,132,032 bytes (115 MiB) SHA1: C1D14C672D9FAFC16BD633A14C56502792D24D13
Now, experiment with movie format, video only, as no audio was on the original.
I don't think the quality factor has been particularly constrained here, which may cause the playback data rate to be a bit low.
The frame rate is manually set to 24. If your laptop refresh on the HDMI is 23.xxx, you can adjust to 23.xxx value. if the refresh on the laptop is 60FPS, then just leave it at 24.
ffmpeg.exe -r 24 -i "Sequence 01.%07d.jpg" -s 3840x2160 -c:v libx264 -preset slow -movflags +faststart movie.mp4
Name: movie.mp4 Size: 12,826,013 bytes (12 MiB) # 7 seconds at 4K, may need a -pix_fmt yuv420p or the like # So far all my pix_fmt attempts have been dismal flops.
It looks pretty good on my small monitor using VLC -- enjoy on your TV, as a test.
Some movie players have a loop capability, so the 7 second sequence can be played forever.
VLC can play that content. You can also try streaming the content to the network port on the TV. Windows Media Player has a streaming capability and can be detected via Plug and Play on the TV end. You could serve a file from Windows Media Player... and a ton of other streaming servers of your own choosing.
And all of this, is to take Youtube out of the picture. You are in control, with your own file as a sample. By using 8K source material (JPGs), the 4K movie should be pretty good.
Paul
I'd give up.
Media streamers that do 4K 60Hz are fairly cheap now.
As I understand it, some people play movies with 24FPS setups. I don't have the gear to test what that's like.
It's when the TV is used as a general purpose desktop extension, that a low 24 FPS screen would suck. Compared to a more normal 60FPS progressive computer monitor rate.
Regular computer monitors, aren't typically specced to run that low. They might be in the range of 60FPS to 72FPS or so, for the old monitors I've got. But there may be provision on modern kit, for other things to happen. Since the 24FPS limit of one of the standards (the HDMI case) was known about.
Maybe there is an active DP to HDMI to allow something else to happen. It's unlikely a laptop has a ton of video connectors sitting there (like a miniDP using available electrical interface), but at least there is a solution for the Intel conundrum. (Where the perpetually-behind HDMI spec is beaten by the DP option.) Putting DP on the laptop side, would have been "best-foot-forward". Many companies do not see it this way.
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