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Detail “Pumping”
I’m trying to re-compress a 1080p60 clip from a camcorder at different target bit rates using Sony Vegas Movie Studio HD Platinum 11. The results using the Sony AVC codec aren’t very good. I can see a lot of almost rythmic “pumping” of the detail that just gets worse the more compression is applied. Checking the re-compressed clips with Bitrate Viewer reveals that the fluctuations in instanteous bit rate are both faster and larger than in the original clip. How can I avoid this? I believe specifying maximum and minimum bit rates would help (to limit the size of the swings) but I can only specify what appears to be an average (and not a very accurate one at that).
Are there parameters in Vegas that I’m not aware of? Should I be using a different codec with Vegas? Should I be using a different program altogether?
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2 Replies
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We will need to know your project properties and what your render out settings are.
My system specs: Intel i7 970, 12GB RAM, ASUS P6T, Vegas Pro 10e (x32/x64), Windows 7 x64 Ultimate, Vegas Production Assistant 1.0, VASST Ultimate S Pro 4.1, Neat Video Pro 2.6
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Project properties conform to the input file, which is 1920×1080 at 59.94 fps (progressive). Render settings are exactly the same. Bitrate Viewer reports the original clip averages ~24Mbps and I am trying to re-compress the clip with no changes to 16Mbps, 8MBps and 4Mbps bit rates using the “Sony AVC/MVC” codec. Video format is AVC. Main or high profile doesn’t seem to make a difference. The Entropy coding is set to default (CAVLC, IIRC). Basically I’m just trying to re-encode with higher compression.
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