Within each encoding tool, viewed on its own:.

High offers best compression, and is the typical profile for broadcast (BluRay and TV).

Main is intermediate between Baseline and High.

Baseline is the вЂњcheap & nastyвЂќ variety, e.g.

Profile controls the degree ofВ sophistication in encoding and decoding.

Both of these applicationsВ offer (among their choices)В CUDA-acceleration for H264 encoding.

What are their specific effects in Sony Vegas (my traditional workhorse) and Sorenson Squeeze (that I am currently experimenting with)?.

How do they influence things (encoding speed, quality, file-size) in practice?.

What do these mean exactly, and what guidance is there for choosing between them? The default varies over varieties of encoder.

For H264-based encoders, their configuration dialog typically offers a choice of Profiles, being Baseline, Main or High.

And arguably they may end up with marginally better or marginally worse performance, depending on how the progressive media was created. 25 fps and nominal 30 fps media will not be able to take advantage of the six 'free' frame (12 field) advantage. When encoding to DVD it's possible to drop those redundant fields and gain effective bandwidth.Д«ut this is a special case. Every three-field frame has one field duplicated, so with this scenario you will have 12 redundant fields per second. By its very nature it's usually already a progressive format, and is made up of mixtures of two- and three-field frames. Media running at 23.976 is a special case. This effect (if any) will very much be dependent on the motion content of the original media. There may also be an improvement in perceived quality, since you'll possibly get fewer artifacts with non-interlaced media. With true progressive-originated media the loss of vertical resolution doesn't occur. This can make the compression process simpler, albeit at the cost of somewhat reduced vertical resolution.

This happens because you drop one field entirely and interpolate it from the remaining, half vertical resolution media. What does happen is if you've converted interlaced media to progressive you've lowered the vertical resolution. The number of frames per second is the same regardless of whether you're dealing with progressive or interlaced media. Progressive DVD's squeeze fewer frames into the same bandwidth, theoretically giving your more info in your images.Completely untrue, Chris.

If you input a 59.94i video instead, you will get a 59.94i result. Forgot to mention that this only works if the video that you input to Squeeze is 23.976p to begin with. Which Randon confirmed to mean it is progressive with pulldown flags. My ensuing e-mail discussion over the past week with helpful Sorenson presenter Randon Morford, yielded the following settings to do the job in Squeeze 8:ДЇield Encoding = Bottom Field First (Progressive resulted in an error.)Дropping the compressed video file produced by Squeeze into MediaInfo shows the following characteristics: During the question session at the end, I asked the presenters to describe the workflow to produce a progressive DVD using Squeeze 8. After hitting a dead end on this topic last month on the Sorenson forum, I attended a Sorenson webinar last week about using Squeeze 8 with Avid MC.

Sorenson squeeze 10 progressive dvd