quality එක වැඩිම mp4 720pද 1080pද ?

[kavindu84]

quality එක වැඩිම mp4 720pද 1080pද ? සමහර video 720p වල size එක 1080p වල size එකට වඩා වැඩියි. තවත් සමහර video 1080p වල size එක 720p වල size එකට වඩා වැඩියි.

 

[RLT4U]

1080p nam frame rate 25 nam aniwa eke video quality wadi.
Samahara encoding tools wala quality eka vadiyen file size aduwen ganna puluwan.

Uba kiyala thiyena eke aniwa audio quality eka adu athi 1080p eke 720p ekata wada.
Encode karana kota file size ekata 50% balapanawa audio quality ekath.

 

[Mandalorian]

1080p with high fps + bit rate

 

[LazyLizard]

හින්දි දෙමල මගුල් තමා මොන විදිහකින්වත් කොලිටිය කියන්න බෑ ඇස් දෙකට දකිනකන් හෙන තඩි සයිස් කොලිටි බිංදුවයි

 

[ryandok]

source වීඩියෝ එකේ සයිස්/කොලිටි එකත් බලපානවා ඒකට. convert කරන එකාගේ සෙටින්ග්ස් profile එකත් බලපානවා. ඔක්කොම කන්ඩිෂන් එකයි කියල හිතලා කිව්වොත් 720 ට වඩා 1080 කොලිටි.

 

[imhotep]

source වීඩියෝ එකේ සයිස්/කොලිටි එකත් බලපානවා ඒකට. convert කරන එකාගේ සෙටින්ග්ස් profile එකත් බලපානවා.

Quite true... Though it seems reasonable to think that a 1080p stream will be better than 720p. But this is not always necessarily true because of video compression. Live streaming encoders use both hardware & software using several techniques to reduce the bandwidth. This sometimes makes it that the 720p version looks better than the 1080p.
Netflix open sourced a product named VMAF (Video Multi-Method Assessment Fusion) which is essentially a tool using an algorithm for asking how an actual human would perceive the quality of an encoded video. If you need want further info read details on this.

 

[kinkon]

bit rate eka saha encoder eka anuwa size wenas wenne
samahara ewa thiyenawa file size eka adu unta patta quality

 

[D_Mad]

B U M P Brooooooooooooo​

 

[BLACKLIST_MEMBER]

File size ekata sapekshawa quality wadie HEVC (x265) wala. ekai okata hethwua.
1080p aniwa 720p walata wada wadie namuth compression eka paththen udin kiyala thiyana eka hari.
x265 kiyanne x264 walata passe aapu codec eka sony camera walin. eka new technology ekak
meke file size eka baagayay x264 walin, same quality.

 

[imhotep]

File size ekata sapekshawa quality wadie HEVC (x265) wala. ekai okata hethwua.
1080p aniwa 720p walata wada wadie namuth compression eka paththen udin kiyala thiyana eka hari.
x265 kiyanne x264 walata passe aapu codec eka sony camera walin. eka new technology ekak
meke file size eka baagayay x264 walin, same quality.

True... I didn't want to mention as the answer was going to be long. HEVC can deliver high-quality 4k video that is up to 75% smaller and promised the way forward to 8k HDR.

Older H.264 breaks an image down into squares of pixels called “macroblocks,” HEVC breaks down the images into “Coding Tree Units” (CTUs) that can be up to 64×64 pixels.
Each macroblock within H.264 can have only interframe (pixels borrowed from the adjacent frame of video) or intraframe (pixels borrowed from the same frame) prediction, but not both.
In HEVC, CTUs actually use a combination of inter- and intraframe compression. Also in HEVC the macroblock doesn't need to be square. Can be of any shape. This allows much more flexibility in the compression process.
In H.264 intraframe compression, there are only eight ways for each block to borrow nearby pixels. But HEVC can use up to 35 different methods to borrow nearby pixels.
Also considerable improvement in the reduction of artefacts was achieved by using new kinds of filtering - sample adaptive offset (SAO) and adaptive loop filtering (ALF).

But the problem with HEVC failing to really pick up is the patent issues. H.264 which has 1 patent pool, but HEVC (H.265) has 3 patent pools with different pricing structures and terms & conditions. This is the reason why many content providers stuck with H.264.
This started a format warfare.... The outcome was the release of VP9 and AV1.

VP9 - In 2010 Google acquired a video compression company that owned VP8, a comparable alternative to H.264. YouTube then open-sourced VP8 to the public without any royalties (No licencse fees). Thus in 2015 they adopted the advanced version VP9 comparable to HEVC.

AV1 - again in 2015, the Alliance for Open media was launched by many including Google, Microsoft, Mozilla and Cisco to create an open and royalty free codec called AV1. Based on Google’s open ‘VP10’ codec with technology from Cisco ‘Thor’ and Mozilla’s ‘Daala’ codecs they created a free alternative for H.265. AV1 is able to do a better compression - about 30% more than HEVC.
Many browsers now have support for AV1.

Also I should briefly mention about VVC. This is the next-generation (after HEVC) standards-based codec developed jointly by MPEG and the ITU. The quality target is 30% bitrate reduction over HEVC at the same perpetual quality.
The future will be determined mainly by the patent issues.....

 

[buddikagayan]

1080p