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Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?

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Ian Brown
Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 1:24:36 pm

Please note that I am aware that quality will suffer and the reason I can't test the idea is because I do not have access to a BD player or PS3 at the moment.

Theoretically it would appear to be possible (due to the details I give later) and I am making the assumption that FCP7's Blu-ray/AVCHD capability is basically the same as Compressor's.

If you open Compressor's Blu-ray/AVCHD Encoding pane in the Inspector, you will see that the Maximum Bit Rate can be adjusted from 6Mbps to 17Mbps with the default being the latter.

According to the info at the bottom of the pane this will allow up to 37 minutes of video on a DVD-5.

If the Maximum Bit Rate slider is dragged to 6Mbps you are then told that you can get up to 89 minutes.

Dragging the AVERAGE Bit Rate slider down to 5Mbps further increases this to 92 minutes.

So will this actually work and produce AVCHD discs up to 90 minutes albeit with a reduction in quality?

As mentioned initially, I am assuming that FCP and Compressor are similar except in Compressor you can manually set the bit rate whilst FCP does it automatically.

If this is so, is it possible to use Share on videos up to 90 minutes and FCP will automatically adjust the bit rate?

Regarding the quality aspect of a 1920x1080 video encoded at 5Mbps I would add this.

I encoded my daughter's wedding video in QT Conversion using H.264 at this setting to be viewed on a Western Digital HD TV player and the results were extremely good as there was very little subject or camera movement.

Conversely, a video of a marching procession using these settings was appalling as the rapid and complex motion necessitated a much higher bit rate.


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Ben Holmes
Re: Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 3:20:14 pm

You would be much better off buying DVD-9s. Most burners can use them easily, and they are a lot cheaper than they used to be. Pushing HD sized frames to that sort of compression is barely acceptable for the web, let alone disk distribution.

Edit Out Ltd
----------------------------
FCP Editor/Trainer/System Consultant
EVS/VT Supervisor for live broadcast
RED camera transfer/post
Independent Director/Producer

http://www.blackmagic-design.com/casestudies/detail.asp?case=therydercup


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Ian Brown
Re: Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 3:30:30 pm

I have no intention of making AVCHD discs of 90 minutes.

I want to know if it is possible.

Until I get access to a BD player I won't know whether it can be done or what the quality (or lack of) will be like.


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Ben Holmes
Re: Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 3:42:00 pm

Forgive me for asking, but if you have no intention of doing it, why ask "Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?"

I gave you a sensible answer, that it MIGHT be possible but would be unacceptable quality. Hence the alternative - use DVD9s, which should be acceptable. The exact size of encoded footage varies even on a CBR scheme depending on the footage. As this falls within the 'will it, won't it' range for fitting, why not try an encode and see if it's more than 4.7Gbs?

Edit Out Ltd
----------------------------
FCP Editor/Trainer/System Consultant
EVS/VT Supervisor for live broadcast
RED camera transfer/post
Independent Director/Producer

http://www.blackmagic-design.com/casestudies/detail.asp?case=therydercup


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Ian Brown
Re: Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 3:55:26 pm

Sorry about the confusion.

Normally I would make DVDs of under 20 minutes which I know is perfectly possible.

However, I never completely trust what I am told as often "common knowledge" can be "common error".

I like to experiment to discover what works for me.

So although I do not intend to make long AVCHD discs as a matter of course, I will be experimenting to see exactly what and what can't be achieved on a DVD-5.

As I have not yet got the BD player, I wanted to know whether anyone had actually checked to see what the limits might be, on the understanding that quality will inevitably suffer.

As I suggested earlier, I have discovered that with suitable subjects, it is possible to get good results with remarkably low data rates.


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Ian Brown
Re: Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 4:06:48 pm

As you can see, these settings are available and therefore one would assume that they have been put there to be used.

Of course, when I can get my hands on a BD player the mystery will be over, but that is going to be in a few more days or so!

<a href="http://s61.photobucket.com/albums/h56/Ian-2006/?action=view&amp;current=com1.jpg" target="_blank"><img src="http://i61.photobucket.com/albums/h56/Ian-2006/com1.jpg" border="0" alt="Photobucket"></a>

<a href="http://s61.photobucket.com/albums/h56/Ian-2006/?action=view&amp;current=com.jpg" target="_blank"><img src="http://i61.photobucket.com/albums/h56/Ian-2006/com.jpg" border="0" alt="Photobucket"></a>


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Ben Holmes
Re: Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 3:45:43 pm

I'd also add that FCP does not offer all the control over compression settings that Compressor does - use Compressor to maximise quality, albeit at a massive time penalty.

Edit Out Ltd
----------------------------
FCP Editor/Trainer/System Consultant
EVS/VT Supervisor for live broadcast
RED camera transfer/post
Independent Director/Producer

http://www.blackmagic-design.com/casestudies/detail.asp?case=therydercup


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Rafael Amador
Re: Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 4:19:51 pm

[Ian Brown] "According to the info at the bottom of the pane this will allow up to 37 minutes of video on a DVD-5."
Yes.
Is a kind of no-standard BR.
it will play only on Mac.
rafael

http://www.nagavideo.com


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Jeremy Garchow
Re: Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 5:04:22 pm

How are you going to make s BluRay out of a DVD?

I guess I'm not following your method here.


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Ian Brown
Re: Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 7:06:12 pm

I am intending to make an AVCHD disc, which is encoded in a similar way to Blu-ray, plays on a Blu-ray player and is burned onto a DVD-5.

Most of the details for doing this are included in the FCS3 manuals except for the length you can actually make them . . . . which is all my question is about.


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Jeremy Garchow
Re: Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 9:57:38 pm

Hmm never tried what you are proposing but you could always do the math.

5 Mbps = .625 MB/sec which is 37.5 MB/min which is 2,275 MB/hr. (2.275 GBs)

Then you have to do the same calculation for audio and add it to video.

Jeremy


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Ian Brown
Re: Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 7:00:18 pm

According to everything I have read, the Mac is the only thing it won't play on.


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Rafael Amador
Re: Is it possible to make AVCHD discs of up to 90 minutes on DVD-5s?
on Jan 16, 2011 at 10:06:03 pm

[Ian Brown] "According to everything I have read, the Mac is the only thing it won't play on.
"
Till recently was supposed to be the only way to play a disk with HD contents on a Mac.
I've never tried,and I don't even know the Files/Folders structure, but if you can access the H264/MPEG-2 (VOB or whatever) inside, you should be able to play it.
You may need some additional software (MPGStreamClip, VLC,..)
rafael

http://www.nagavideo.com


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