MTV3000 1080p 作戰 (Updated2)

27 8月 2008

MTV3000的畫質一向廣受好評,因它錄出來的是transport stream(ts),所以不少人會嘗試把不同的ts file 放在MTV 播放。網上的高清的電視節目大多為1080i 或720p 的ts,這次我會試試1080p的Blu-ray remux。

首先setup 如下:
MTV3000:

  • firmware 2.03 beta
  • 1080i 輸出畫面 (我的LCD TV不support 1080p啦 :( )
ts:
是次試了Pixar Short Film Collection: Volume 1 的Blu-ray remux
全部(13套)為:
  • Video: MPEG2 Video 16:9, 1080p, 29.97fps
  • Audio: Dolby AC3 48000Hz 6ch 640Kbps
  • Length: 每套大約5 mins
一如以往用tv file maker 製作tv file, 把ts及tv file 放進USB HDD,刪除tv.db。

測試結果:
9/13 順利播放,其餘4套short film 聲音和畫面間中有點窒,看來MTV3000吃不消1080p吧.......

就是這個畫面,窒了...

真的嗎? 平心而論,這個測試setup有點不公平啦,1080p video DOWNSCALE到1080i 輸出,會增加系統的負荷。

Remark:
我在播放完窒聲畫的ts file後,MTV3000回到電視的畫面,但沒有了聲音! 我想內裡有些processes dead 了吧,才影響它的正常運作。

所以在此奉勸各位玩家,如果出現有聲無畫或MTV轉台/menu開始遲鈍的時候,請重新啟動MTV。
(設定>系統>重新啟動)

2008/09/12更新:
使用firmware 2.05 beta
畫面沒有窒,聲音間中窒
但明顯smooth了好多好多

2008/09/23更新:
忘記了最重要的一點,要留意file 的bit rate(謝留言的提醒)。可用MediaInfo check, HTML view有Overall bit rate一欄。

原來窒的video.....Overall bit rate 有 31.9 Mbps!TVB 播奧運開幕式也不超過20Mbps...
MTV也沒有預這種情況,所以說.... 這個測試setup 有點問題....

7 comments:

匿名 說...

For 1080p playback on MTV3000, try to built the TS file with 4.0 profile (e.g. I am using 15Mbps average with 23Mbps max.)

IShin 說...

Do you mean Dolby 4.0?
Thanks for reminding the point about bit rate ;)

匿名 說...

It's h264 level number. Please refer to http://en.wikipedia.org/wiki/H.264.

In general, I am using profile 4.0 to built any H264/AVCHD files for MTV3000.

IShin 說...

Thank you genius!
I used MediaInfo to check my 1080p TS file again..

Video Format profile : High@L4.1

Do you use TsMuxeR to remux the TS? When selecting the video track, I saw the option to change level.

匿名 說...

I had captured many HD video with my HD camcorders and using Tmpgenc to create AVC/H264 in MP4 format. Convert it to H264 raw format with Yamb and remux it to TS with TSMuxeR.

Just tested with High@4.1 profile on 24Mbps (30Mbps max.) and worked on MTV3000 without any problem. Screen quality is better than TVB program.

Unknown 說...

I tried to play some 1080p ts file in MTV5000. Some are ok but many became fast forward and no sound. Any suggestion?

wecare 說...

想問 我有條1080p的片 放到magic tv播
會冇聲 好窒 係電腦播又好順...
點解會咁?點先會順? 係咪太高清唔得?咁應該點?
我放落高清電視睇都係想高清d者...

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