Ðề: [Review] Đánh giá nhanh siêu phảm Himedia H8 Octacore.
Phần hình ảnh và các bộ giải mã video Rockchip muôn đời vẫn thế mà.
Thêm sự so sánh giữa các Rk3288 và 3368
Let’s being with video samples from samplemedia.linaro.org, as well as some Elecard
H.265/HEVC samples, and a low resolution VP9 video:
H.264 codec / MP4 container (Big Buck Bunny) – 480p/720p/1080p – Mostly OK, but I could notice some “image jump” occurring very rapid, maybe 2 or 3 times in the video, as if an older frame was displayed for a short. It might also have been a bit smoother
MPEG2 codec / MPG container – 480p/720p/1080p – Same results as for H.264
MPEG4 codec, AVI container 480p/720p/1080p – Same results as for H.264
VC1 codec (WMV) – 480p/720p/1080p – audio only
Real Media (RMVB), 720p / 5Mbps – Software decode @ ~18 to 22 fps instead of 25 fps
WebM / VP8 – Could be a little smoother
H.265 codec / MPEG TS container (360p/720p/1080p) – 360p and 720p – OK. 1080p plays at 15fps, for a 24fps video, ) with audio/video sync issues.
WebM / VP9 (no audio in video) – OK
Results are a little disappointing, although it’s possible some people find video playback to be acceptable, as the “image jump” issue does not occur that often and is very short (like one frame).
I’ve followed up with some higher bitrate videos:
ED_HD.avi – OK, except during fast moving scenes, where the video is not really smooth
big_buck_bunny_1080p_surround.avi (1080p H.264 – 12 Mbps) – OK.
h264_1080p_hp_4.1_40mbps_birds.mkv (40 Mbps) – OK
hddvd_demo_17.5Mbps_1080p_VC1.mkv (17.5Mbps) – audio only, and it stops after 9 seconds
Jellyfish-120-Mbps.mkv (120 Mbps video without audio) – Sometimes OK, but most of the time not, with the fps fluctuating a lot between 12 fps to 60 fps… played from USB hard drive
Các bài test cho thấy chip 3368 gặp vấn đề với các file 4K H265 - 60fps (thế thì HDMI 2.0 để làm gì nhỉ?), các video 10 bit cũng lỗi, các video chuẩn VP9 hầu hết đều lỗi. Nói chung các bài test video 4K phần lớn là nó đã ko vượt qua.
Nguồn:
http://www.cnx-software.com/2015/08/16/rockchip-rk3368-review-beelink-i68/