27 8月 2008

MTV3000 1080p 作戰 (Updated2)

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 則留言:

  1. 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.)

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

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  3. 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.

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  4. 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.

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  5. 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.

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

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  7. 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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