guidoip

原帖由 sk2k 於 2009-2-25 10:23 發表
請 cap video sample 再上報 ati ...
exactly 一樣的問題, 自上年11~12月已 report ati, 多番折騰到而家都未解決, 有同樣問題的都 report 下, 等 ati 唔好以為係個別例子唔理.

我已經問緊ati , 等緊佢回

drinksen

我都有呢個問題...
樓主用咩player睇hdtv? 我用dvb, 仲一定要開硬解, 熄左dxA會花畫面, 變左硬食looping問題

dckc

How can we find out which part causes this problem?
First, can we confirm that the video stream is free of error ?  Maybe the software decoders are less sensitive to error stream.
Can it be the TV card that decode the signal incorrectly and output an problematic video streams?
Can it be the TV station signal modulator or video stream encoder?
I donno.  But first we have to confirm the video stream contains no error bits.  Is this problem occurs only when we are watching TVB H264 programmes, and everything is fine when watching ATV?
So far, from what I observed from previous posts, this occurs when watching TV, but not when watching other H264 encoded files.

[ 本帖最後由 dckc 於 2009-2-25 14:21 編輯 ]

willy2228

Can someone tell me where to download back the old driver?? I have serious problem once I upgrade to the new dirver...

dckc

原帖由 willy2228 於 2009-2-25 14:40 發表
Can someone tell me where to download back the old driver?? I have serious problem once I upgrade to the new dirver...

Goto http://ati.amd.com/support/driver.html
Select the one suitable for you.
Click the link "Previous Drivers and Software" under "Additional Links:"

Oops

原帖由 dckc 於 2009-2-25 14:00 發表
How can we find out which part causes this problem?
First, can we confirm that the video stream is free of error ?  Maybe the software decoders are less sensitive to error stream.
Can it be the TV car ...

This problem happens only with TVB H264 clips

gkun

點解我連睇h.264 o的電影都會爆格o既  仲要兩部機都有同樣問題

dckc

原帖由 gkun 於 2009-2-25 15:54 發表
點解我連睇h.264 o的電影都會爆格o既  仲要兩部機都有同樣問題

Does the "爆格" when watching the film is similar to the "爆格" when watching TV?
Which H264 profile/level the encoded film is at?  I heard that ATI hardware acceleration, like most of the hardware decoders, only support up to level 4.1 (It's the level Bluray discs using).  But software decoders, like CoreAVC, ffmpeg, etc, may support higher levels.

H.264 video must comply with its level limitations for max macroblocks/sec, max macroblocks/picture, max decoded picture buffer size, etc, which limits the number of reference frames at each video resolution.  But some film files are encoded at level higher than 4.1 and with high number of reference frames.  These files cannot be played using hardware.  That's why you sometimes find files tagged with PS3 playable or something like that.