MirageKnight

除非
1. iphone,ipad粒CPU可以好多一倍.
2. programmer特登好比心機咁寫 RMVB -> MP4的 Codec(佢地都係用D現成的改).
唔係無乜可能.

我已經放棄係部ipad放rmvb. 我係部pc轉咗mp4好過.快靚正.

kyohse

麻煩少少既話，　先用格式工廠由rmvb-> avi(AAC), 再用handbrake轉做iPad support既mp4 ...
rockyw 發表於 2010-10-5 23:49

唔駛用handbrake，用 格式工廠 選Video  "AVC",  Audio "AAC" 就得

MirageKnight

個人用過不少 transcode . 但始終喜歡用WindMencoder2.1. 雖然好舊同係大陸野.不支援什麼CUDE,STREAM. 但4,6核CPU還是很快.而且quarity很好.

ykwky

除非
1. iphone,ipad粒CPU可以好多一倍.
2. programmer特登好比心機咁寫 RMVB -> MP4的 Codec(佢地都係用D ...
MirageKnight 發表於 2010-10-17 23:40

並非 CPU 問題！因為 RMVB 同 MP4 係同源嘅，大家都係屬於 H.264，雖然未必係 identical，不過有9成9相似：
http://wiki.multimedia.cx/index.php?title=RealVideo_4
http://wiki.multimedia.cx/index.php?title=H.264

咁點解 iPhone, iPad, iPod Touch 播放 MP4 咁流暢，但係播放 RMVB 咁窒呢，因為：
MP4 係一個 public 嘅 video container，而 RMVB 係屬於 Real 嘅（private），咁 Apple 有乜可能幫 Real 宣傳，而唔直接用 MP4 呢？退1萬步，Apple 寧願 support 返 Quicktime（.mov）啦，所以我覺得唔係 CPU 問題（因為粒 U 其實已經好快、好正架啦！），而係 iOS 本身唔 support RMVB，未來亦都唔會 support 得好，究其原因：商業利益！

所以我覺得，如果大家想睇 RMVB，可以：
1. 轉檔
2. 買部 RMVB Player（HK$3xx)

附帶一提，如果想係 iPhone, iPad, iPod Touch 播 RMVB 無咁lag，可以試試：
1. 只睇 360x240 resolution 或以下嘅 RMVB
2. 盡量唔好睇高清 RMVB（720P）

yinyeah1212

c-hing can try Zumocast.  i think it does a much better job than oplayer but you can only choose to transfer rmvb files by 3G or by Wifi.

MirageKnight

並非 CPU 問題！因為 RMVB 同 MP4 係同源嘅，大家都係屬於 H.264，雖然未必係 identical，不過有9成9相似 ...
ykwky 發表於 2010-10-19 11:05

I didn't say iphone CPU is not powerful and fast enough to handle many other things.

I phones  have hardware acceleration for MP4(H.264). So you can play 720p H.264 vidoe very smooth. However, there is no HW acceleration for others. So, you need tons of CPU power to these formats with a bad performance lib to decode the file and plays on screen. So if you want play rmvb with Oplayer very smooth. you need a more powerful CPU for the bad performance lib unless the programmer really workhard on the codec lib for iphone.

I really don't recommended people to use RMVB anymore.  If you have tons of RMVB collections. Time to waste a day to transcode them to H.264 and all your headache gone.

ykwky

I didn't say iphone CPU is not powerful and fast enough to handle many other things.

I phones  ha ...
MirageKnight 發表於 2010-10-19 13:32

I think that there should be many programmers have such technical (for RMVB) in mind, but they did not make it.

The point is, actually, no one going to write a perfect (or an acceptable) codec of RMVB for Apple's devices, because Apple do not permit anyone to do so...

Please try to think about this: if RMVB plays well at iPhone, iPad and iPod Touch, how about Quicktime?

MirageKnight

I think that there should be many programmers have such technical (for RMVB) in mind, but they did ...
ykwky 發表於 2010-10-19 15:20

Only people in China like to use RMVB format as the file size is really small. Easy for them to DL as China's tnternet  is suck. But the quality is horrible too. If everyone like to use RMVB format then the company won't become smaller and smaller. rmvb may soon be a part of  history.

There is not such rule that Apple not allow programmer to fine tune and optimize the application already approved. Just don't break the rule that provide function that Apple not allowed in anyway suck BT/Prons/kernel function modify/pirate software ..etc.

You don't see any good rmvb player for JB as no apple rule applied. If you can find  a people code a great rmvb player and sell it like iaccess. I think tons iphone user in China will buy it(1/10 buy, 9/10 use prirate) you will be rich already.