## YouTube doesn't play my videos in high resolution

I uploaded some 1080 x 1920 pixels (portrait) MP4 H.264 videos to my YouTube channel, but YouTube only allows playback with a maximum resolution of 480p. How can I get them to allow playback at the original resolution?

The videos were recorded on a LG H932 Android phone with software version H93230d.

The codec info according to VLC:

``````Stream 0
Codec: H264 - MPEG-4 AVC (part 10) (avc1)
Language: English
Type: Video
Video resolution: 1920x1080
Buffer dimensions: 1920x1088
Frame rate: 30.011402
Decoded format:
Orientation: Left bottom
Color primaries: ITU-R BT.601 (525 lines, 60 Hz)
Color transfer function: ITU-R BT.709
Color space: ITU-R BT.601 Range
Chroma location: Left

Stream 1
Codec: MPEG AAC Audio (mp4a)
Language: English
Type: Audio
Channels: Stereo
Sample rate: 48000 Hz
Bits per sample: 32
``````

Based on the upload encoding settings recommended by YouTube, I tried ffmpeg to move the moov atom to the top of the file and upload it again with the following command, but it made no difference.

`ffmpeg -i input_video_file.mp4 -vcodec copy -acodec copy -movflags faststart output_video_file.mp4`

If it matters, I have no subscribers on my YouTube channel and the videos are set for private visibility.

## nvidia – My monitor was recognized as unknown and cannot change the 18.04 LTS resolution

I just restarted the system. When it started I found that the resolution had changed to 1024 x 768 (4: 3) and the standard resolution of my monitor was 1600 x 900 (16: 9) and I couldn't change the resolution at all and whenever I did using the xrandr command, he gives me that `Failed to get size of gamma for output default` Message what can I do to fix this

By the way, I installed a GTX 1050Ti with 430 drivers

## openldap – ldap's SRV resolution does not work

I have an AD environment and can use SRV records in DNS in ldapsearch to resolve the LDAP servers in the domain and in one location.

This works great on the usual ldap port on 389 with basic authentication and STARTTLS.

However, some terrible clients will not run STARTTLS or the provider cannot provide a method of configuration. (1) Therefore, we need to provide an option for LDAPS on 636.

Basically, I believe that creating ldaps SRV records and using the `ldaps:///` URI should work. I have created 2 LDAP SRV records in the domain zone (there are 3 LDAP hosts) but if I do `ldapsearch` and specify `ldaps:///`All it discovers are the ldap hosts.

Here is the `ldapsearch` Command – here it comes back three DCs with _ldap SRVs on the port 389

``````\$ ldapsearch -v -H "ldaps:///dc%3Devl%2Cdc%3Dexample%2Cdc%3Dcom" -D "user" -W -b "DC=evl,DC=example,DC=com" -b "" -s base "(objectclass=*)" -d 1

ldap_url_parse_ext(ldaps:///dc%3Devl%2Cdc%3Dexample%2Cdc%3Dcom)
ldap_create
``````

However, the client computer can fix the problem two SRVs for _ldaps with port 636

``````\$ dig -t SRV _ldaps._tcp.evl.example.com +short
``````

Here is the LDAP-SRV for comparison

``````\$ dig -t SRV _ldap._tcp.evl.example.com +short
``````

When I query a particular server for ldaps, everything is fine

``````\$ ldapsearch -H ldaps://evladc001vs.evl.example.com -D "user" -W -b "" -s base "(objectclass=*)"
# extended LDIF
#
# LDAPv3
# base <> with scope baseObject
# filter: (objectclass=*)
# requesting: ALL
#

#
dn:
currentTime: 20200213045340.0Z
subschemaSubentry: CN=Aggregate,CN=Schema,CN=Configuration,DC=evl,DC=example,DC=com
...
``````

I would appreciate advice on whether to miss an option or something else that is obvious on the matter.

(1): Please do not start lectures on the use of different products. Large companies have integration problems no matter what – tell hospital systems to buy different software for millions of dollars for their specific needs

## Network – Ubuntu 18.04's DNS resolution fails after a while

If I ping google.com on my Ubuntu 18.04, it gives me

``````ping: google.com: Temporary failure in name resolution
``````

I would keep running then

``````sudo service systemd-resolved start
``````

My /etc/resolv.conf has a symbolic link as shown

``````/etc/resolv.conf -> /run/systemd/resolve/stub-resolv.conf
``````

The content is as follows

``````# This file is managed by man:systemd-resolved(8). Do not edit.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "systemd-resolve --status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs must not access this file directly, but only through the
# symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,
# replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 127.0.0.53
options edns0
``````

My question is, after running sudo service systemd-resolved start, it would work for a while (maybe a couple of hours), then if I ping google.com again, there would be the name resolution error. How can I permanently activate my system to resolve name resolution? I think it has something to do with the systemd solution? I have experienced this for a few days. Thank you very much

## homological algebra – To understand the description of the relative group homology \$ H _ {*} (G, H; mathbb {Z}) \$ as a free \$ G \$ resolution

To let $$G$$ be a group and $$H$$ his subgroup ($$H$$ doesn't have to be normal). Consider a chain complex $$(C _ {*} (G), partial)$$ Where $$C_n (G)$$ is the free Abelian group that is generated by the set $$G ^ {n + 1}$$ and $$partial = sum_i (-1) ^ {i} partial_i$$, Here $$partial ((g_0, g_1, ldots, g_n)) = (g_0, g_1, ldots, g_ {i-1}, g_ {i + 1}, ldots, g_n)$$ Now we define relative homology groups $$H _ {*} (G, H; mathbb {Z})$$ to be the homology groups of the chain complex $$(D _ {*}, tilde partial)$$ Where

$$D_n: = C_ {n-1} (H) oplus C_ {n} (G)$$
and
$$tilde partial = begin {bmatrix} partial & 0 \ i_ * & – partial end {bmatrix}.$$

This is proven in the theorem in The Volume and Chern-Simons Invariant of a Representation$$2.1$$ that the relative homology can be described as free $$G$$-Resolutions over $$K$$ This is the kernel of the augmentation map $$epsilon: C_0 (G / H) to mathbb {Z}.$$

To prove this, they first constructed a chain complex $$(F _ {*}, delta)$$ from free $$G$$Modules and proved that $$H _ {*} (F _ {*} otimes _ { mathbb {Z} (G)} otimes mathbb {Z}) = H _ {* + 1} (G, H).$$

The construction of $${F_i } _ {i = 0} ^ { infty}$$ is as follows:
To take $$F_i = D_ {i + 1} otimes _ { mathbb {Z}} mathbb {Z} (G)$$ to the $$i geq 1$$ and $$F_0 = ker (D_1 to D_0) otimes _ { mathbb {Z}} mathbb {Z} (G).$$

To prove that $$(F _ {*}, delta)$$ is the free resolution of $$K$$it is enough to prove the card's kokernel $$F_1 to F_0$$ is isomorphic to $$K$$, You write that picture of $$F_1 to F_0$$ is the core of the card $$F_0 cong C_1 (G) xrightarrow { partial} C_0 (G) xrightarrow { pi} C_0 (G / H)$$ and I'm stuck here,

Below are the calculations I did to find the image of $$F_1 to F_0$$ (all throughout the discussion $$G$$Modules are correct $$G$$Modules):

begin {align} & Delta big ((m (h, 1) otimes 1, m & # 39; (g_1, g_2,1) otimes 1) otimes g big) \ & = delta big ((m (h, 1) otimes 1, m & # 39; (g_1, g_2,1) otimes 1) big) otimes g \ & = big ((m – mh) x 1, m (h, 1) x 1 – m & # 39; (g_2,1) x 1 + m & # 39; (g_1,1) x 1 – m & # 39; (g_1, g_2) otimes 1) big) otimes g \ & = (0, m (h, 1) × 1 – m # (g_2,1) × 1 + m # (g_1,1) × 1 – m ((g_1g_2 ^ {- 1 }, 1) otimes 1) otimes g. end {align}

Under the isomorphism $$F_0 cong C_1 (G)$$, we have $$delta big ((m (h, 1) x 1, m & # 39; (g_1, g_2,1) x 1) x g big) = m (h, g) -m & # 39; (g_2, g) + m ((g_1, g) -m # (g_1g_2 ^ {- 1}, g).$$

So the picture of the card $$F_1 to F_0 to C_1 (G)$$ is generated by the crowd
$$S: = {m (h, g) – m & # 39; (g_2, g) + m & # 39; (g_1, g) – m & # 39; (g_1g_2 ^ {- 1}, g) ~ | ~ h in H, g_1, g_2, g in G, m, m & # 39; in mathbb {Z} }$$,

Now I see no reason why the set $$S$$ Cards too $$0$$ under the map $$pi circ partial: C_1 (G) to C_0 (G / H)$$,

To understand this, I have already asked questions 1 and 2 at math StackExchange. And in the comments of 1, a valid point is raised that relates to ingestion $$m = 1$$ and $$m & # 39; = 0$$ can we conclude that $$H = G$$ that's funny.

## Unity3d Android – Fixed resolution

How can I set a fixed 720p resolution on every device with unity3d android?

unity3d version: 2018.4.5f1

## Software tools or methods for extracting images from higher resolution videos by combining multiple images

If a stationary video is zoomed and viewed as a human, more details can be "seen" over several frames, since noise can be switched off and / or slightly shifted details can be combined to a coherent understanding of the scene.

Is there any software that can also extract a frame from a video that has a higher resolution than the video itself? Maybe with a traditional algorithm and / or AI.

What is not of interest here is single-image AI upscaling with super resolution, in which only one image is used as the source.

## digital – How do I set up my camera to have a resolution of 300 dpi?

Tailored to the new question:

You cannot change your camera's ppi (or dpi) settings. Usually they declare 72 dpi, 96 or some don't declare it at all.

Before you load a photo into Photoshop, you can set the resolution on your canvas to match the resolution specified by your camera.

You are really confusing here.

1) PPI

DPI is actually a unit used in printers to define how small the dots are (and how many dots can be in an inch).

In photography, the unit is not a dot (per inch) but a pixel (per inch). The number you refer to (300) is this unit: ppi. It is a relationship between the actual pixels of an image and the physical print size.

Here are 2 photos:

One is approximately 700 ppi and the other is 10 ppi.

PPI is just a number in the photo and is only used for printing. It has no meaning in the photo itself.

2) Photo resolution.

Some high-end cameras (over \$ 40,000) like this https://www.phaseone.com/ can take up to 80 megapixels.

Very large files.

3) Composite images.

If you merge several images, you can create very, very, very large files: http://www.collective-evolution.com/2015/01/20/nasa-hat-released-the-largest-picture-ever-evoved -taking-it-will-rock-your-universe / 1.5 billion pixels or around 1,000 megapixels.

or this: http://360gigapixels.com/london-320-gigapixel-panorama/ 320 Gigapixel.

## Remote Desktop – Client resolution changes for a short time when connecting to RDP so that all open windows are stacked on top of each other

Both machines have individual large 4k displays. Similar hardware. Here is the .rdp file I'm connecting to:

``````screen mode id:i:2
use multimon:i:0
desktopwidth:i:3840
desktopheight:i:2160
session bpp:i:32
winposstr:s:0,1,1120,133,3840,2130
compression:i:1
keyboardhook:i:2
audiocapturemode:i:0
videoplaybackmode:i:1
connection type:i:6
networkautodetect:i:0
bandwidthautodetect:i:1
displayconnectionbar:i:1
enableworkspacereconnect:i:0
disable wallpaper:i:0
allow font smoothing:i:1
allow desktop composition:i:1
disable full window drag:i:0
disable themes:i:0
disable cursor setting:i:0
bitmapcachepersistenable:i:1
audiomode:i:0
redirectprinters:i:0
redirectcomports:i:0
redirectsmartcards:i:1
redirectclipboard:i:1
redirectposdevices:i:0
autoreconnection enabled:i:1
authentication level:i:0
prompt for credentials:i:0
negotiate security layer:i:1
remoteapplicationmode:i:0
alternate shell:s:
shell working directory:s:
gatewayhostname:s:
gatewayusagemethod:i:4
gatewaycredentialssource:i:4
gatewayprofileusagemethod:i:0
promptcredentialonce:i:0
gatewaybrokeringtype:i:0
use redirection server name:i:0
rdgiskdcproxy:i:0
kdcproxyname:s:
drivestoredirect:s:
``````

When I plug it in it falls on something for a second `3200x1600` and move all of my open windows to the top left of the screen. Then you return to the correct resolution.

I recently switched from 3 1080p monitors on the computer that are used to connect a 4k monitor. The other machine (which is connected to RDP) had 2 1080p monitors and after a while I also replaced it with a 4k monitor.

Identical Windows 10 installations on both, with all updates installed.

## Technology – Why is an increasing number of cameras on drones improving resolution?

`Pegasus drone` and generally use normal cameras, but surprisingly have the same effect as a high magnification telescope.

I know using multiple monitors improves the number of display pixels, which is reasonable, but somehow the similar technique works for drones.