Daniel Low
Forum Replies Created
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[Brendan Pyatt] “Encoder tab:
Video Settings: Apple ProRes 422, Interlaced but Top or Bottom field first? Leave chroma filtering unticked?”Why are you going to ProRes? – You’ll be colour subsampling from 4:2:0 to 4:2:2 and finally 4:1:1 – best avoided.
As soon as you drop it into the DV sequence, it’ll need rendering, are you doing some complex compositing or something?
Otherwise you’ll want the field order to be bottom field first.
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Two years from now, spam will be solved. – Bill Gates, World Economic Forum 2004 -
[david Eadenhall] “If I opt for proper streaming, is there anyway to be able to control the quality that all my viewer’s will see, or will it be their internet connection speed that holds full control over that? I just want to know what my viewers will be seeing.”
The connection speed has a direct impact on the image quality. If the connection speed drops, then the picture will eventually degrade and even dissapear.
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Two years from now, spam will be solved. – Bill Gates, World Economic Forum 2004 -
[david Eadenhall] “Is this possible to set up on my server, or is this a very complicated process to go through? This surely would be an ideal solution.”
I’m fairly sure it’s possible with a Flash player but I’ve not seen it done and I wouldn’t know how to do it. One for the Flash forums.
With Quicktime, there’d be nothing to do at all, it just does it.
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Two years from now, spam will be solved. – Bill Gates, World Economic Forum 2004 -
I don’t have any direct expereince with Flowplayer but it appears to have a fully featured toolset including a bandwidth checker:
https://flowplayer.org/plugins/streaming/bwcheck.html
[david Eadenhall] “Those Apple trailers consistently stun me, the quality, the content, the immediacy etc – sensational! What sort of compression techniques do they use, its unbelievable?”
They get hold of the best quality source content to start with and have a team of skilled compressionists working to generate the outputs using a variety of software encoders including compressor and cleaner. Nearly all content is encoded to H.264.
[david Eadenhall] “How have they been able to allow the users to only use the bandwidth once by watching and saving the file in one go – that sounds like the perfect solution?”
As the file is being progressively downloaded, it’s already there on the hard drive, the Quicktime player then just enables the saving (moving) of it to a convienient location for the user.
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Two years from now, spam will be solved. – Bill Gates, World Economic Forum 2004 -
[david Eadenhall] “My question is if I offer a video for progressive download and also for download via zip, am I effectively going to double my bandwidth usage”
Yes, pontetially if it the same video you use for both types of downloads.
[david Eadenhall] “If I decided to stream the video instead, so the user could still view the video right away before deciding whether to also download a zip copy, would that use up alot less bandwidth?”
Yes, if the streaming clip is at a much lower datarate than the downloadable zip version.
[david Eadenhall] “If one views progressive downloads in a normal browser, can you still have the option of being able to maximise the video to full screen, or are you limited to the exact frame size of your original video file in the browser?”You are limited by the capabilities of the browser and the browser plug-in. What player are you considering using? If it is a Flash player you’ll need to script a button that will allow it to playback at fullscreen.
Alternatively, look at the way Apple delivers it’s HD Quicktime movies: https://www.apple.com/trailers/#section=justhd
Anyone with Quicktime Pro (or Quicktime Alternate) can save any of these movies directly to their hard drives and only use up the bandwidth once.
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Two years from now, spam will be solved. – Bill Gates, World Economic Forum 2004 -
[Jennifer West] “2) Read on blogs to try this: FCP out with Compressor – same settings as above except using 640 x 480 H.264 as a .MOV file. Looked ok for first 10 seconds, then heavy pixellation”
What exact settings are you using, datarate for example?
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Two years from now, spam will be solved. – Bill Gates, World Economic Forum 2004 -
If it were me (and in fact many of my collegues would agree) I’d go with ProRes. It’s very high quality, works well with FCP and there’s a decoder available for Windows. You stay 4:2:2 and 10bit.
If you want to use up much less storage space, you could look at using the PhotoJPEG codec which can be either 4:2:0, 4:2:2 or 4:4:4 depending on the position of the quality slider.
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Two years from now, spam will be solved. – Bill Gates, World Economic Forum 2004 -
Are you sure the preset you are using is 16:9 square pixel output?
Try another output preset that specifically relates to 16:9 and see what happens
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Two years from now, spam will be solved. – Bill Gates, World Economic Forum 2004 -
[Rick Sebeck] “Any ideas as to why I am getting variable bit rates?”
I’m assuming that it’s because the content in each of these clips is different. Just because you’ve set a datarate, that rate is only an average, the codec can choose to use more or less per second depending on what it need to describe the picture; less information in the picture needs less data, more information (and movement) requires more data..
The only way to force a fixed rate is to use an i-frame only codec like DV, or one of the uncompressed Blackmagic type codecs.
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Two years from now, spam will be solved. – Bill Gates, World Economic Forum 2004 -
[david Eadenhall] “So the sacrifice of this is that users with slower connections will have to wait longer before being able to start viewing if I go the progressive route?”
Yes.
[david Eadenhall] “Can one use the progressive download option with a media streaming server, or is that only for real streaming?”
No need (you just need a simple webserver for progressive download) but it’s probably possible, have a chat with the Wowza support guys.
[david Eadenhall] “Am I right to believe that using a VBR is better than a CBR for progressive download?”
It depends on the kind of content; a simple interview, for example, will not benefit from VBR, an action movie would.
VBR will make for a far more efficient encode, meaning the file size will generally be smaller, as it has allocated data more meaningfully. 2-Pass is the the best way to encode VBR. Actually 2-pass is the best for CBR too. If you have the luxury of time.Final Cut, MPEG Streamclip and Quicktime Pro are not the tools of choice here. Adobe Media Encoder is pretty good and should have presets for both streaming and download, I don’t use it so I can’t be sure.
The best tools for the job are Apple compressor (which you should have) and Episode.
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Two years from now, spam will be solved. – Bill Gates, World Economic Forum 2004