Daniel Low
Forum Replies Created
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[Tom Opferman] “Is it at all possible to compress a video once to a format that will play well on all phone types?”
You are correct, the answer is no.
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“There’s no chance that the iPhone is going to get any significant market share. No chance.”
Steve Ballmer To USA Today: 30 April 2007 -
x264 is Open source, where as H.264 is commercially licensed by the MPEG LA.
No commercial software can use x264 without itself becoming Open source.
x264 is considered the best out there but you have to be something of an expert in the coding parameters to get the best out of it, despite there being a number of decent front end GUIs for it.
Unless you are pushing the extremes of low bitrates with complex material, you find there’s not much in it between x264 and the better codecs from the likes of Main Concept and Dicas.
Remember there’s more to encoding/transcoding than the codec, there’s also scaling, deinterlacing, colour space conversion and so on. Those are handled by the rest of the compression software
There is also of course Ateme, which although of great visual quality, is stupidly expensive and the software was clearly designed by blind alligator (or similar)
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“There’s no chance that the iPhone is going to get any significant market share. No chance.”
Steve Ballmer To USA Today: 30 April 2007 -
Ah, OK.
What formats does liquid allow you to export?
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“There’s no chance that the iPhone is going to get any significant market share. No chance.”
Steve Ballmer To USA Today: 30 April 2007 -
[steve nicholl] “I’d also like to de-interlace it as well as I’ll mainly be viewing it on my Sony Bravia (which is 1080p). “
Leave that for the Bravia to do. It’ll do a better job than you can and it’ll do it in realtime.
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“There’s no chance that the iPhone is going to get any significant market share. No chance.”
Steve Ballmer To USA Today: 30 April 2007 -
So, you’re not doubling the amount of content by you have twice the space available.
You must be able to answer the question from that!
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“There’s no chance that the iPhone is going to get any significant market share. No chance.”
Steve Ballmer To USA Today: 30 April 2007 -
[Guy LEFEVRE] “magnetooptic Betanum”
What is that?
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“There’s no chance that the iPhone is going to get any significant market share. No chance.”
Steve Ballmer To USA Today: 30 April 2007 -
Nice one, thanks for that Chris.
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“There’s no chance that the iPhone is going to get any significant market share. No chance.”
Steve Ballmer To USA Today: 30 April 2007 -
It depends on how it’s being served:
AFAIK
HTTP streaming will require that the whole video is downloaded
RTSP/RTMP streaming can play from the point the viewer decides without buffering the prior data.__________________________________________________________________
“There’s no chance that the iPhone is going to get any significant market share. No chance.”
Steve Ballmer To USA Today: 30 April 2007 -
Care to share your answer with this forum?
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“There’s no chance that the iPhone is going to get any significant market share. No chance.”
Steve Ballmer To USA Today: 30 April 2007 -
Simply:
Key frames are like compression markers, they instruct the codec to start the calculation of how to create a frame, from scratch. A key frame, otherwise known as an I-Frame is the starting point for all frames proceeding that frame until the next I-frame. (I’ll not complicate this explanation with B and P frames).Every piece of video starts with an I-Frame
Modern codecs set keyframes automatically based on their own internal calculations as to how different one frame is from the previous frame.
You are referring to how to manually force keyframes to be inserted and the general, basic rule is to set this to be 10x the frame rate (for standard def material). So if your target frame rate is 25fps, then your keyframe setting would be every 250 frames or every 10 seconds.
Your setting is correct.
[Blake Porter] “When people try to scroll back in the video, the video still needs to pre-load… “
That’s nothing to do with keyframes but rather to do with how the video is buffering or has buffered.
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“There’s no chance that the iPhone is going to get any significant market share. No chance.”
Steve Ballmer To USA Today: 30 April 2007