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AVCHD Limitations
duckysan1 [Avatar]
Newbie Location: Victoria, BC, Canada Joined: Aug 29, 2014 12:17 Messages: 11 Offline
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For the past 15 years I've used Pinnacle Studio, up to and including v15. Since the Avid takeover, the product changed enough to give me the push I needed to try PowerDirector.
As I do not have a BD burner, I've produced AVCHD onto standard DVD+R for the past few years. With Pinnacle, 35m was the upper limit on a single layer. Cyberlink appears to use a higher bit rate resulting in 25m tops. Consequently I used a DL disc for my project.

1. Disc not at all happy on my Panny BD35 - stutters occasionally and then becomes highly pixellated and distorted.
2. Plays well on my Sony BDP-S5100
3. I conclude the bitrate os causing the hassles on the Panny. Seems to run consistently at 22000-24500Kbps, which the newer Sony seems to tolerate. I'm also not convinced that the Verbatim +R DL 2.4x disc is that great a medium.

Now for my questions:

a) Can a custom AVCHD profile be created that will render at a lower bitrate, say 16000, and subsequently allow longer time on single layer DVD?
b) Are my concerns about the DL media real?
c) Should I be biting the bullet and purchasing a BD burner

Thanks, Duckysan

i7 4790, 16Gb, Gigabyte Z97, GTX460, 500Gb Seagate SSD, WD 2Tb Black, Win 7 Pro x64
stevek
Senior Contributor Location: Houston, Texas USA Joined: Jan 25, 2011 12:18 Messages: 4663 Offline
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a) You should be getting almost 40 minutes on a single layer disc.
b) No, you are using good media.
c) Are you planning to make a lot of blu ray video projects? Do you have the need for blu ray. Prices for burners and discs have come down a lot so the decision to go to bly ray is more difficult.

If the AVCHD disc plays well on your Sony BDP then there is nothing wrong with the disc. If it doesn't play well on the Panny; then that is where you should look. Did you update the firmware for it lately? Some higher priced players just do not like home burned discs and there is nothing you can do abut that. .
.
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Anything I post unless stated with a reference is my personal opinion.
duckysan1 [Avatar]
Newbie Location: Victoria, BC, Canada Joined: Aug 29, 2014 12:17 Messages: 11 Offline
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Thanks Steve! Have just discovered the drop-down 'Smartfit'. Am burning my 37m project to a single layer DVD+R as I write.
Still somewhat ambivalent about buying into BDR just for my home productions. Ideally I'd like to render to MKV and archive these on my NAS, if only chapters were handled (see my other post today). I get the feeling that BD is not for the long term. i7 4790, 16Gb, Gigabyte Z97, GTX460, 500Gb Seagate SSD, WD 2Tb Black, Win 7 Pro x64
duckysan1 [Avatar]
Newbie Location: Victoria, BC, Canada Joined: Aug 29, 2014 12:17 Messages: 11 Offline
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An update - using Smartfit resulted in really notable stuttering of the video - especially during pans. The DL project was generally far smoother. I note the same issues either on the PC or the Panny.
Techically, I'm wondering whether it's a keyframe issue, and/or differences caused when rendering. Bear in mind that the source material is all 29fps/16000kbps the project is also set to 29. i7 4790, 16Gb, Gigabyte Z97, GTX460, 500Gb Seagate SSD, WD 2Tb Black, Win 7 Pro x64
duckysan1 [Avatar]
Newbie Location: Victoria, BC, Canada Joined: Aug 29, 2014 12:17 Messages: 11 Offline
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And now I get it - checking the stream file on the disc, it's shown as 23fps............how on earth does it get produced like this? i7 4790, 16Gb, Gigabyte Z97, GTX460, 500Gb Seagate SSD, WD 2Tb Black, Win 7 Pro x64
duckysan1 [Avatar]
Newbie Location: Victoria, BC, Canada Joined: Aug 29, 2014 12:17 Messages: 11 Offline
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I've attached the file info after the project was rendered with Smartfit. Clearly somebody thought it clever to limit frame rate rather than bitrate to confine the disc size. What a terrible idea!
[Thumb - Capture.JPG]
 Filename
Capture.JPG
[Disk]
 Description
Stream info
 Filesize
24 Kbytes
 Downloaded:
57 time(s)
i7 4790, 16Gb, Gigabyte Z97, GTX460, 500Gb Seagate SSD, WD 2Tb Black, Win 7 Pro x64
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