Daniel Low
Forum Replies Created
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Squeeze is not really a pro-level product and as such does not include such tools and filters.
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You could try some alternative routes using either:
MPEG Streamclip:
https://www.squared5.com/svideo/mpeg-streamclip-mac.htmlor ffMPEGx
https://homepage.mac.com/major4/or isquint:
https://www.isquint.org/All of them should be (much) faster than Compressor.
or take a look at the Elgato Turbo H.264 hardware accelerator product.
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WMV/VC-1 support on the Mac (yes guys Mac, not MAC) is pretty poor even with flip4mac.
I’d suggest that you trancode to MPEG-4 (pt 2) or H.264. MPEG-4 should trancode very fast indeed. H.264 should transcode faster than WMV (VC-1) and give you higher quality.
The Xbox limits MPEG-4 to 5Mb/s and H.264 to 10Mb/s. -
AFAIK you can’t.
If you’re on a Mac then Episode can. (www.flip4mac.com)
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Agreed, messing about with GOP structure is a great way of totally wasting many hours! Squeeze default settings are fine. As Ben points out, if you need better quality than Squeeze can produce, you really need to look at another application.
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Not having access to compressor at this time, could you remind us by detailing the ‘Web setting’.
The things that slow encode times down are multi-pass encoding, and any other settings that are on ‘Best’ rather than ‘better’ or ‘normal’ like deinterlacing etc. -
Keyframes:
Most modern CODECs are perfectly good at inserting keyframes automatically. By setting a keyframe interval of 10 seconds all you are telling your transcoder is that you want to manually force a keyframe every 10 seconds, the codec will still insert it’s own in between your manually forced ones.
Forcing more keyframes will actually hurt picture quality and, as you have found, encoding efficiency.
Remember that the 25Mb/s you are getting is actually a higher datarate than your source! (1280×720 HDV is 19Mb/s)
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OK,
Get back to us with the deinterlace and datarate settings.
Your keyframes setting should be somewhere between a keyframe every 5 to 10 seconds, not every half a second, (if that’s what you mean by ‘0,5’?)
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In compressor……
What deinterlace settings are you using?
Are you using constant bitrate (CBR) or variable bitrate (VBR)?
What are your keyframe intervals?
The Apple 1080 trailers come in between 8 and 25Mb/s (Megabits) so your 720 transcodes should come in between 3 and 12Mb/s
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Ignoring, for a moment, the fact that you need the material on DVD, I-Frame only at a high enough bitrate (e.g. 50Mb/s) will give you the best quality. – e.g. IMX 30/40/50. Generally speaking these formats are 4:2:2, DVD spec is 4:2:0
Taking into account the fact that you need the material to playback from DVD then Long-GOP (Max 9.8Mb/s) is the only way to go to get high quality at a bitrate that falls within the DVD spec.