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YOUTUBE SOUND QUALITY AND PICTURE QUALITY (AS OF JUNE 2021) Part 2


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YOUTUBE SOUND QUALITY AND PICTURE QUALITY (AS OF JUNE 2021) Part 2

YouTube Audio

Video format: VP9
DASH value Video size Video bitrate Comments
278 144p (256 × 144) 100K-300 Kbps Validated in Firefox
330 144p (256 × 144) (Only HDR compatible terminals can be selected) Validated with Google Pixel 4
242 240p (426 × 240) 100K-500 Kbps Validated in Firefox
331 240p (426 × 240) (Only HDR-compatible terminals can be selected) Validated with Google Pixel 4
243 360p (640 × 360) 200K-950 Kbps Validated in Firefox
332 360p (640 × 360) (Only HDR-compatible terminals can be selected) Validated with Google Pixel 4
244 480p (854 x 480) 300K-2 Mbps Validated in Firefox
333 480p (854 x 480) (Only HDR-compatible terminals can be selected) Validated with Google Pixel 4
247 720p (1280 x 720) 30 fps 600K-4.3 Mbps Validated in Firefox
302 720p (1280 x 720) 60 fps 600K-4.3 Mbps Validated in Firefox
334 720p (1280 x 720) (Only HDR compatible terminals can be selected) Validated with Google Pixel 4
248 1080p (1920 × 1080) 30 fps 700K-7 Mbps Validated in Firefox
303 1080p (1920 × 1080) 60 fps 700K-7 Mbps Validated in Firefox
335 1080p (1920 x 1080) (Only HDR compatible terminals can be selected) Validated with Google Pixel 4
271 1440p (2560 × 1440) 30 fps 3.5 M-13 Mbps Validated in Firefox
308 1440p (2560 × 1440) 60 fps 3.5 M-13 Mbps Validated in Firefox
336 1440p (2560 x 1440) (Only HDR compatible terminals can be selected) Validated with Google Pixel 4
313 2160p (3840 × 2160) 30 fps 5.7 M-37 Mbps Validated in Firefox
315 2160p (3840 × 2160) 60 fps 5.7 M-37 Mbps Validated in Firefox
337 2160p (3840 x 2160) (Only HDR compatible terminals can be selected) Validated with Google Pixel 4
272 4320p (7680 × 4320) 10 M-50 Mbps Validated in Firefox
Video format: AV1
AV1 is an open source video compression format called AOMedia Video 1. Since it is a codec in development as a successor standard to VP9, ​​it seems that VP9 videos will eventually be replaced by AV1, but it will take time to replace them because the only supported browsers currently are Chrome and Firefox. .

Postscript 2020/4/23: Confirmed to apply to some videos.
When applied, the DASH value will be as follows
av01.0.05M.08 (398) / opus (251)

DASH value Video size Video bitrate Comments
394 144p (256 × 144) is not clear Validated in Firefox
395 240p (426 × 240) is not clear Validated in Firefox
396 360p (640 × 360) is not clear Validated in Firefox
397 480p (854 x 480) is not clear Validated in Firefox
398 720p (1280 x 720) is not clear Validated in Firefox
399 1080p (1920 x 1080) is not clear Validated in Firefox
571 4320p (7680 × 4320) is not clear Validated in Firefox
Audio
Audio format: AAC-LC
DASH value Audio bit rate Cutoff frequency Comments
36 not clear not clear Can’t verify because iPhone 7 has no headphone output
18 96 Kbps 15 kHz Validated with Internet Explorer 11 on Windows 10
Twenty-two 128 Kbps 15.8 kHz Validated with Internet Explorer 11 on Windows 10
139 96 Kbps 15 kHz Validated with Internet Explorer 11 on Windows 10
140 128 Kbps 15.8 kHz Validated with Internet Explorer 11 on Windows 10
Same for AAC = 139 (96 Kbps) 18

Same for AAC = 140 (128 Kbps) 22

Audio format: Opus
Since the Opus audio bit rate is a variable bit rate (VBR), the average value is displayed. It will increase up to about 2 times.

DASH value Audio bit rate Cutoff frequency Comments
249 48 Kbps (VBR) 20 kHz Validated in Firefox
250 64 Kbps (VBR) 20 kHz Validated in Firefox
251 128 Kbps (VBR) 20 kHz Validated in Firefox
Opus = 249 (48 Kbps)

Opus = 250 (64 Kbps)

Opus = 251 (128 Kbps)

Postscript 2020/2/11: It looks like Opus audio was finally created for all users’ videos.

Please refer to the article linked above for how to upload in high quality.

To check after upload, right click on the video about a day after upload, click “Detailed Statistics” and check the value of “Codecs”.
At this time, be sure to use a browser other than “Safari”. Safari is not compatible with Opus.

Success story: Codecs vp09.00.51.08.01.01.01.01 (243) / opus (251)
Failure example: Codecs avc1.4d401e (134) /mp4a.40.2 (140)
The video / audio codecs are listed in order. (In this case, the video is vp9 (243), so it is 360p in WebM format, and the audio is Opus (251), so it is 128Kbps video in Opus format.)

Depending on the video, more than 30 videos can be generated in one video.

● YouTube app
Click here to download the app
ANDROID IOS

Version “15.20.33” or later updated on May 14,
2020 (strictly speaking, it will apply approximately from May 23, 2020)

Now it is compatible with Opus audio. (Android compatible devices only)


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YOUTUBE SOUND QUALITY AND PICTURE QUALITY (AS OF JUNE 2021)

YOUTUBE SOUND QUALITY AND PICTURE QUALITY (AS OF JUNE 2021)

YouTube Audio

This time, I investigated the sound quality and image quality of “YouTube”.

youtube audio

HOW TO UPLOAD TO YOUTUBE WITH HIGH QUALITY SOUND

Basically YouTube uses “H.264 AAC-LC” or “Opus” as the audio codec.
The video codec used is “H.264” (MP4) or “VP9” (WebM). “AV1” is also used in some videos.

Verification method
(Video) Download the official video of “3D Youtube Downloader”, upload the video to “VLC Media Player” and refer to Media Information → Input Bit Rate in Statistics.
(Audio) Check the audio of the video downloaded by the above method using “foobar2000” for the bit rate. The cutoff frequency is converted to .wav format by “XMedia Recode”, and the file is imported into “WaveSpectra” and verified.

● PC
The PC version of YouTube ranges from 144p (320 x 180) to 4K (3860 x 2160), but there are differences in the image quality that can be selected and the audio that can be played depending on the browser.
You can check if your browser supports it on the next page.
YOUTUBE SUPPORT BROWSER

The following is the support status for each browser (browsers that support both VP9 and MP4 have the highest picture and sound quality).

Browser name PIN
Internet Explorer (Windows7) Not supported (not visible)
Incompatible iOS Safari
Internet Explorer (Windows 8.1 / 10) Only compatible with MP4 (not viewable)
Safari on Macintosh Only compatible with MP4
Microsoft Edge （EdgeHTML） Correspondence (depending on model)
Microsoft Edge （Chrome） Correspondence
Firefox Correspondence
Google Chrome (recommended browser) Correspondence
Correspondence table by DASH browser
* We are looking for information. Provide information in the comment section.

Recommended browser
YouTube Help from
> YouTube video is available to view in a variety of formats and resolutions. However, some browsers do not support the new video format. Depending on your browser, you may only have one or two video formats to choose from. We recommend that you update your browser or operating system to enjoy watching the video comfortably.

The following is an example of a browser and operating system combination that supports the video format for high-quality YouTube videos.

Google Chrome (all operating systems)
MS Edge
Safari (Mac OS X 10.10 or later)
Firefox (Windows 7 or later and Mac OS X 10.10 or later)
* Internet Explorer is no longer supported.

Video and Audio DASH Correspondence Table
[Caution] In the following table, only those whose use is currently confirmed are listed. Therefore, not all configurations are listed.

Photography
Since the video bit rate is a variable bit rate (VBR), the upper and lower limits are listed. The mean value is somewhere in the middle.

Image format: MP4
DASH value Video size Video bitrate Comments
36 240p (426 × 240) is not clear Validated with Safari on iOS14 (mp4v.20.3, mp4a.40.2)
18 360p (640 × 360) 500K-1 Mbps Validated with Safari on iOS14 (avc1.42001E, mp4a.40.2)
22 720p (1280 × 720) 1-3 Mbps Validated with Safari on iOS14 (avc1.64001F, mp4a.40.2)
160 144p (256 × 144) 50K-90 Kbps Validated with Internet Explorer 11 on Windows 10
133 240p (426 × 240) 150K-580 Kbps Validated with Internet Explorer 11 on Windows 10
134 360p (640 × 360) 200K-1 Mbps Validated with Internet Explorer 11 on Windows 10
135 480p (854 × 480) 250K-2.3 Mbps Validated with Internet Explorer 11 on Windows 10
136 720p (1280 × 720) 30 fps 300K-4.4 Mbps Validated with Internet Explorer 11 on Windows 10
298 720p (1280 × 720) 60 fps 300K-4.4 Mbps Validated with Internet Explorer 11 on Windows 10
137 1080p (1920 × 1080) 30 fps 500K-6.2Mbps Validated with Internet Explorer 11 on Windows 10
299 1080p (1920 × 1080) 60 fps 500K-6.2Mbps Validated with Internet Explorer 11 on Windows 10
Image form: VP9
DASH value Video size Video bitrate Comments
278 144p (256 × 144) 100K-300 Kbps Validated in Firefox
330 144p (256 × 144) (Only HDR compatible terminals can be selected) Validated with Google Pixel 4
242 240p (426 × 240) 100K-500 Kbps Validated in Firefox
331 240p (426 × 240) (Only HDR-compatible terminals can be selected) Validated with Google Pixel 4
243 360p (640 × 360) 200K-950 Kbps Validated in Firefox
332 360p (640 × 360) (Only HDR-compatible terminals can be selected) Validated with Google Pixel 4
244 480p (854 × 480) 300K-2 Mbps Validated in Firefox
333 480p (854 × 480) (Only HDR-compatible terminals can be selected) Validated with Google Pixel 4
247 720p (1280 × 720) 30 fps 600K-4.3

8D the new way of listening to music?

8D the new way of listening to music?

Regarding 8D, it is blunt: “Actually the term was invented by marketing, it is not something scientific. In fact, we who are in this want to know what it means. It works because it sounds good. ” According to the man who worked on more than 3,000 musical projects (and counting) throughout his career, it is actually a technique that emerged in the early 1970s in England, which fulfilled a function of giving sound a characteristic spherical. In the jargon, they prefer not to opt for the 8D concept since nobody knows what those 8 dimensions are reliably; on the contrary, they choose the term “360 ° Music” or “Binaural”. To define it, Mayo says that “it is based on a phase manipulation that allows the brain to identify where the sound is coming from.”

Broadly speaking, from a complicated work that has a mathematical basis, the sound phase is worked that allows the brain to distinguish where the information comes from. The creator of the 360 ​​° sound was the English inventor Michael The Man Gerzon, an extraordinary mathematician who, in Mayo’s own words, “discovered something very powerful but was 40 years ahead, so that in his time he was not valued enough”.

If you consider yourself a music lover and go with your helmets everywhere, you’ve probably heard of 8D Music. But do you know what it is or what it consists of? We will tell you.

8D music or 8D sound is a type of sound that seems to come from all directions. Although it seems a novel technique, the truth is that it has its origin in the 80s and is known as ambisonic, binaural or 3D sound.

It was discovered by the porteño Hugo Zucareli, when he showed that we do not listen in a linear way, but that we locate sounds in space at 360-degree angles.

Specifically, it consists of offering an immersive experience, something similar to what happens with virtual reality. In fact, its main focus is precisely video games and virtual reality.

Do you want to listen to 8D music with good headphones? Attentive to these from Amazon

But how exactly does 8D music work? It all starts by manipulating the sound waves so that they sound like they are coming from multiple directions. Thus, those who make this audio are able to edit where it comes from and keep it moving. So it seems to be coming from everywhere and moving around you.

Currently, music in 8D has become a trend on social networks again due to a composition created by A R Rahan, since the instrumental composition seems to sound all over our head.