Ed Dooley
Forum Replies Created
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Well, it’s definitely possible, but you may not be happy with the quality. A frame size that big will use up a lot of
the data rate to maintain quality. A question and possible suggestion. You mentioned that you need the audio
with the video (a program stream), and that you want QT. Is that because someone’s going to edit it further?
If it’s only because you want someone to view it, you could create an MPEG2 (which will look better than QT
compressed that much) with the audio embedded (again, a program stream). In Compressor under the Extras tab
in the Inspector, you have the option to choose Multiplexed MPEG1 audio. That will give you an MPEG2 for your DVD
with the audio in the stream, and at a decent quality. If that’s not an option you can break up your movie into segments
that will all fit on a DVD, and can be stitched together later. If you go the DVD route, you can use something like mpegstreamclip
to get it back to a QT.
Ed[Theguybehindtheguy] “Your right Ed I should have been more specific. I think the reason Im having the problem, is that I need the the movie to maintain 720×480 Which I dont think its possible. Is it?”
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That’s why it pays to be clear in your questions. You could mean you’re compressing *from* a QT to a DVD, or *to* a QT (as it turns out,
is what you’re trying to do). The simple answer is *yes*, it’s easy to compress a file that size down to 4.3 gigs, or way smaller. What else
do you want to know? You can use H.264 if viewers have the latest QT Player, or use the QT6 compatible settings in Compressor if you
need broader compatability. You set a data rate that will make it the total maximum size you need.
Ed[theguybehindtheguy] “Im not compressing for A DVD. I was able to compress to mpeg2. I got it down, to like 2.69gigs, but I need a quicktime movie, Audio and video together. Im on a Mac, and using Final cut pro, and compressor 2. I dont undersatand why, Mpeg2 is smaller then regular quicktime?”
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What do you mean, transfer on the web? Do you mean FTP to people, or
to stream or progressive download to viewers?
Ed -
Of course. I am compressing a 65 gig movie right now for DVD. I recently compressed a 120 gig movie to DVD.
Nothing unusual about file sizes that big. What tools do you have? Are you on PC or Mac? Compressor, Squeeze,
ProCoder, ffmpegX, all kinds of apps will compress it.
Ed -
Oh you young kids today! 🙂
MPEG1 *is* universal, and until Flash came out it was the only real cross-platform solution (don’t get me started on Real Media!).
It is neither QT nor AVI, it is MPEG. It will play in Windows Media Player and QuickTime.
As for using Cleaner for MPEG1, I wouldn’t go around suggesting that, Cleaner (unless it was fixed in 6.5- hah, I made a joke!)
sucked at MPEG1.
Ed[Chris Babbitt] “Is Mpeg-1 universal? In other words, will it play on a Mac or PC? Is it neither Quicktime nor AVI?”
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I thought you guys were shooting 16:9 with 14:9 safe, not 4:3. Not true? I know the BBC uses it.
Ed[Ben Holmes] “Slightly OT, can probably NO USE to you at all, but over in the U of K, broadcasters often show 4:3 footage in 16:9 shows by adding ‘curtains’ either side – the analogy being the cinema curtains that sit there in the adverts and swing out for the main feature.
Now obviously, actual curtains are rarely used (!), but most people use a layer underneath the 4:3 footage made up of the same footage stretched out and heavily blurred. It can be suprisingly effective, and has the added advantage that if people are viewing the programme 4:3 (often the case over here) the blurred edges are cut off, and they are left with the original 4:3 frame. Over here, all programmes have to be shot and cut 4:3 safe, as most set-top boxes can output cropped 4:3 to older TVs, even when the majority here now have 16:9 tellies.
Still, it’s a way of using 4:3 footage in a 16:9 show that DOESN’T involve horribly blowing up your footage, which looks nasty by any means.”
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Don’t take my word for it because I’m not 100% sure, but I’ve been told (by people I trust)
that scaling (to 133% as suggested) in After Effects is better than FCP, so the previous suggestion might be the best.
You might do a search of this forum because I’m pretty sure it’s been covered before.
Ed -
I linked to the wrong calculator. FFMPEGX has a calculator for all kinds of sizes, rates, etc.
https://ffmpegx.com/download.htmlI gave you the math because you didn’t say (and you still haven’t said) what target bit-rate you want.
Choosing your intended audience’s connection speed is one the most important things in determining
your bit-rate, which in turn determines your video’s final file size. You asked: [Arty] “i bring it out then squeeze it in squeeze…what would you say the file size should be ?”
And I answered what the file size should be is based on what connection speed your audience has (hence the math). Squeeze should be
making good looking videos at 320×240 at even the lowest 300kbs rate (and if you do the math you’ll see what the
file size should be- or use the new FFMPEGX link I sent you). If you want more help, you’ve got to give more information.
Ed -
Doesn’t that sound funny? A 30sec commercial for PBS (the non-commercial TV network). 🙂
PBS (as do all networks) has specifications for formats they accept, and the standards they expect. You can get it directly from them.
They’re very detailed. As for the on-camera mic question, you should raise your own standards if you’re going
to be doing TV work (with some big exceptions, the quality expected for TV is a bit higher than for weddings).
Ed[EditorGirl] “I am getting ready to shoot and edit a 30 sec commercial for PBS”
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The file size can be whatever you want it to be. If you compress it to play back for the slowest DSL (384kb),
you’ll get one size. If you compress it to play back for 512kb or 1.5mb, you’ll get 2 other sizes. It’s simple math,
the data rate you choose (a kb is .125 of a KB, which 1,000 of those KBs add up to a MB, close at least), so data rate times length
of video= file size
kbs=kilobit per second
KBS=kilobyte per second
MB=megabyte per second
Instead of remembering 5th grade math, though, you can use the handy AJA Data Rate Converter (OSX):
https://www.aja.com/html/support_kona3_swd.html
Scroll down to: AJA Data Rate Calculator Application (Version 2)
This OS X software application calculates data rates and storage requirements for a given video size, format, and frame rate. It’s great for both KONA and Io users as a resource for configuring systems and determining storage requirements.
Ed