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function Yl(a){a/=255;return.03928>a?a/12.92:Math.pow((a+.055)/1.055,2.4)}
;/*
Copyright 2018 The Incremental DOM Authors. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS-IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
var Zl=Object.prototype.hasOwnProperty;function $l(){}
$l.prototype=Object.create(null);function am(a,b){for(;a.length>b;)a.pop()}
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function(){return void b.Xi()},"onblur",function(){b.ka=!1;
b.o&&b.o.blur();b.Ka()},"oninput",function(){var e;
b.model.$a(b.ha.value);null===(e=b.model.Nd)||void 0===e?void 0:e()});
b.ha.value=b.model.Pa();b.model.Le&&0===b.model.rows&&(b.ha.style.height=Fn(b)+"px",b.ha.style.overflowY="hidden")});
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var c=b.model.error||b.model.Li;c&&(b.element("div","id",b.ma,"class",{"helper-text":!0,"helper-text-invalid":b.model.error,"helper-text-disabled":b.model.disabled,"helper-text-filled":b.model.filled,"helper-text-outlined":!b.model.filled,"helper-text-hidden":!b.model.error&&b.model.ql&&!b.ka},c),b.ha.setAttribute("aria-describedby",b.ma))})};
function En(a){return a.model.ri?a.model.ri.map(function(b){return"self"===b?Gn(a):b}).join(" "):Gn(a)}
function Gn(a){return a.model.Jb()?a.labelId:a.model.placeholder?a.ta:null}
function Fn(a){var b=Number(getComputedStyle(a.ha).paddingLeft.replace(/[^0-9\.]/g,"")),c=a.ha.clientWidth-2*b;b=a.element("div","class","expander","style","width: "+c+"px",""+a.model.Pa()+"\u200b");if(a.model.vg){var e="\n".repeat(a.model.vg-1);a=a.element("div","class","expander","style","width: "+c+"px",""+e+"\u200b");return Math.min(b.clientHeight,a.clientHeight)}return b.clientHeight}
l.Xi=function(){this.ka=!0;this.o&&this.o.focus();this.Ka()};
l.Pa=function(){return this.model.Pa()};
l.$a=function(a){this.model.$a(a)};
l.Kc=function(a){this.model.Kc(a)};
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l.Fd=function(a,b){Rd(a);return Kn(this,{Fd:a,attributes:Vd(b)})};
l.yd=function(a){Rd(a);return Kn(this,{yd:a})};
l.text=function(a){return Kn(this,{html:he(a)})};
l.safeHtml=function(a){return Kn(this,{html:Kd(a).toString()})};
function Kn(a,b){a.o++;var c="{SafeHtmlFormatter:"+a.o+"_"+je()+"}";a.ha[he(c)]=b;return c}
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function On(a,b,c){return a.o.then(function(e){var f=e[b];if(!f)throw Error("Method not found: "+b);return f.apply(e,c)})}
function Pn(a,b,c){for(var e=Array(arguments.length-2),f=2;f>>0),la=[["js_request_id",na],["rr",1],["lc",1]],pa=mo();0 \n'),
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"search.svg":rc(' \n'),"workflow.svg":rc(' \n'),
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Recommended upload encoding settings Below are recommended upload encoding settings for your videos on YouTube.
Container: MP4
No Edit Lists (or the video might not get processed correctly)
moov atom at the front of the file (Fast Start)
Audio codec: AAC-LC
Channels: Stereo or Stereo + 5.1
Sample rate 96khz or 48khz
Video codec: H.264
Progressive scan (no interlacing)
High Profile
2 consecutive B frames
Closed GOP. GOP of half the frame rate.
CABAC
Variable bitrate. No bitrate limit required, though we offer recommended bit rates below for reference
Chroma subsampling: 4:2:0
Frame rate
Content should be encoded and uploaded in the same frame rate it was recorded.
Common frame rates include: 24, 25, 30, 48, 50, 60 frames per second (other frame rates are also acceptable).
Interlaced content should be deinterlaced before uploading. For example, 1080i60 content should be deinterlaced to 1080p30. 60 interlaced fields per second should be deinterlaced to 30 progressive frames per second.
Bitrate
The bitrates below are recommendations for uploads. Audio playback bitrate is not related to video resolution.
Recommended video bitrates for SDR uploads
To view new 4K uploads in 4K, use a browser or device that supports VP9.
Type
Video Bitrate, Standard Frame Rate
(24, 25, 30)
Video Bitrate, High Frame Rate
(48, 50, 60)
2160p (4K)
35–45 Mbps
53–68 Mbps
1440p (2K)
16 Mbps
24 Mbps
1080p
8 Mbps
12 Mbps
720p
5 Mbps
7.5 Mbps
480p
2.5 Mbps
4 Mbps
360p
1 Mbps
1.5 Mbps
Recommended video bitrates for HDR uploads
Type
Video Bitrate, Standard Frame Rate
(24, 25, 30)
Video Bitrate, High Frame Rate
(48, 50, 60)
2160p (4K)
44–56 Mbps
66–85 Mbps
1440p (2K)
20 Mbps
30 Mbps
1080p
10 Mbps
15 Mbps
720p
6.5 Mbps
9.5 Mbps
480p
Not supported
Not supported
360p
Not supported
Not supported
Recommended audio bitrates for uploads
Type
Audio Bitrate
Mono
128 kbps
Stereo
384 kbps
5.1
512 kbps
Resolution and aspect ratio
The standard aspect ratio for YouTube on a computer is 16:9. When uploading other aspect ratios such as vertical or square, the player automatically adapts itself to the size of the video. This setting gives the best viewing experience based on the aspect ratio and device.
Learn how to use resolution and aspect ratios correctly.
Color Space
Recommended color space for SDR uploads
YouTube recommends BT.709 as the standard color space for SDR uploads:
Color Space
Color Transfer Characteristics (TRC)
Color Primaries
Color Matrix Coefficients
BT.709
BT.709 (H.273 value: 1)
BT.709 (H.273 value 1)
BT.709 (H.273 value 1)
YouTube standardizes functionally similar color matrices and primaries before processing the video. For example, BT.601 and BT.709 TRC are identical, and YouTube unifies them to BT.709. Or, BT.601 NTSC and PAL have functionally similar color matrices and YouTube unifies them to BT.601 NTSC. In addition, YouTube may take the following actions to interpret the color space values:
When
YouTube Action
The upload color space has unspecified TRC.
Assumes BT.709 TRC.
The upload color space has unknown or unspecified color matrix and primaries.
Assumes BT.709 color matrix and primaries.
The upload color space mixes BT.601 and BT.709 color primaries and matrix with specified values.
Uses the color matrix to override the color primaries and make them consistent.
The upload color spaces mixes BT.601 and BT.709 color primaries and matrix, and either primaries or matrix is unspecified.
Uses the specified value of color primaries/matrix to set and override the unspecified one.
After the upload color space standardization, YouTube checks if the color space matches BT.709 or BT.601, in which case the color space passes through. Otherwise, YouTube converts the unsupported color spaces to BT.709 by mapping pixel values.
Note : YouTube converts the color primaries that require high bit depth (which does not use a supported HDR transfer function) to avoid banding, such as BT.2020, to BT.709 (8-bit). YouTube converts full color range to limited color range.
Warning : YouTube does not recommend the RGB color matrix on uploads. In this case, YouTube initially sets the color matrix to unspecified before the standardization. It will then infer the color matrix using the color primaries during standardization. Note that sRGB TRC will convert to BT.709 TRC. YouTube re-tags the color primaries/matrix/TRC to BT.709 if it is not supported by Ffmpeg colorspace conversion filter.
Recommended color space for HDR uploads
Refer to the Upload HDR videos article.
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