AMD 顯卡的 4K/HEVC 硬解支援 - 顯卡
By Caitlin
at 2015-12-17T17:26
at 2015-12-17T17:26
Table of Contents
之前在各種中英論壇爬過許多相關文章,得到的資訊不外乎是
1. AMD顯卡 不支援 4K 影片硬解
2. AMD顯卡 不支援 HEVC 影片硬解
(為了避免討論上的麻煩,讓我們暫且排除 Fiji 架構的卡)
我的 CPU 是 i5-3450。
首先,我用下面這個影片進行i5軟解的測試,
https://www.youtube.com/watch?v=sLprVF6d7Ug
然後 CPU 達到 100% 每秒卻只能吐出 21 張左右(影片原來是24fps)。
裝上顯卡 R7-260 之後,就可以很輕送地撥放。
這可以得出兩個結論:
1. i5-3450 不足以軟解這個9630kbps的4K/AVC 影片
2. R7-260 有出力幫忙
這過程中 CPU 使用率在 30~50% 跳動
這跟我當初想像的「播放4K影片,AMD顯卡沒屁用」很不一樣
接著我又跑去找些 HEVC 影片來玩。
我從下面這個網頁下載了些影片測試,
http://www.elecard.com/en/download/videos.html
我發現即便是網頁中 Elecard 4K video about Tomsk, part 3,
這個 17.6 mbps 25fps 的HEVC 影片,一樣可以順播。
CPU使用率在 50~70% 跳動
最大那個懶得測
所以R7-260在這個播放過程中是有出力的,
這也跟我想像的「播放HEVC影片,AMD顯卡沒屁用」很不一樣
所以一般所謂的 AMD 不支援 4K or HEVC 硬解指的是沒有純粹的硬解支援嗎?
否則從我的測試看起來,有沒有顯卡是會造成巨大落差的。
不過這樣看來 R7-260 戰到壞掉是沒啥問題了 ㄎㄎ
我只擔心能不能順播未來的4K/HEVC動畫而已
--
「瘋了的...是這個我和雪不能在一起的世界!!!!」
~我妻由乃
--
Tags:
顯卡
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