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Old January 31st, 2010, 04:30 AM   #1
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Is this jerky 2

If you can stand to watch it again :)


pw = rendertest

Seems better for me this time - still some macroblocking but not as bad or noticeable.
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Old January 31st, 2010, 11:29 AM   #2
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To me it looks about the same as the first version. Perhaps slightly less macroblocking on the water shots, but still some frame drops on the zoom-out.

Maybe you're dealing with vimeo limitations, not issues with the encoding of your intermediate file. The final test would be to assemble the problem clips into a short, encode your intermediate at a much higher bitrate, then see if vimeo does better with it.

(what are the specs of the intermediate file you're shipping to vimeo?)

If you are pushing the abilities of Vimeo's encoding, and you find the current results unacceptable (although it looks darn good), or, just want to experiment:

Picture complexity is usually the issue. Ways to deal with this:
1) More bitrate. In this situation, Vimeo is in control of this, not you. (But, it is also possible to bitrate-starve your intermediate file.)
2) Less complexity.
2a) Less resolution (smaller pixel dimensions, eg. give them a 720p instead of 1080i/p)
2b) Crush blacks slightly (dark greys that may already be visually black become black)
2c) Crush whites slightly (similar, but probably not good for your content, very un-filmic)
2d) Apply a slight horizontal gaussian blur (not so much that you can see the difference, but that it will make a difference to the encoder).

All these can be seen as compromises of one thing in favor of another. There are no rules, other than if it looks good, it is good!
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Old January 31st, 2010, 01:29 PM   #3
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Video
ID : 201
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 1 frame
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 3mn 37s
Bit rate mode : Variable
Bit rate : 10.6 Mbps
Maximum bit rate : 45.6 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 fps
Resolution : 8 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.171
Stream size : 275 MiB (98%)
Encoded date : UTC 2010-01-31 00:12:45
Tagged date : UTC 2010-01-30 00:33:19

Audio
ID : 101
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Codec ID : 40
Duration : 3mn 37s
Bit rate mode : Variable
Bit rate : 165 Kbps
Maximum bit rate : 186 Kbps
Channel(s) : 2 channels
Channel positions : L R
Sampling rate : 48.0 KHz

Above are the specs, I agree this one looks pretty good it's just the stutter/jitter I don't like.

The first one was 720 I decided to try this one at full size and bumped up the bit rate - first was only 5088 per Vimeo's recommended settings with Super.

For me the only spot this version seems to falter is at the Geese and that of course ruins the whole effect I'm going for :(

I'll probably try some of your suggestions thanks for watching again.
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Old January 31st, 2010, 02:40 PM   #4
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Quote:
Originally Posted by Thomas Moore View Post
Bit rate mode : Variable
Bit rate : 10.6 Mbps
Maximum bit rate : 45.6 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Definitely try 1280x720, if you want to keep at this. (Oh, it looks like you did one at 720p, try it with the higher bitrate.) 1920x1080 is more than twice the pixels as 1280x720, did you more than double the bitrate?

Certainly a compromise, but may look better than other compromises!

I'll be interested to know what you arrive at as the best approach.
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