[mythtv] Streaming over network

[Chris Pinkham]

> Modern video encoding works by calculating the differences between frames.
> Thus, in order to do any work on frame N+1, frame N must already be encoded.
> It is a serial process.

Just to throw out a couple ideas....

1) What if you had 2 threads doing the encoding, and each encoded 1/2 of the
frame (ie, top half and bottom half on the 16-pixel boundary or whatever 
fits best with the codec).

2) If you're using a codec with key frames, what if 2 (or more) threads
were running and each only encoded a key frame and the succeeding diff
frames up until the next key.  So if you had 2 threads, they would do
alternating groups of frames.  As long as they could encode at over
1/2 speed they should be able to keep up with realtime.  This would take
a lot of memory though if you used a high key frame rate of 150-250.

Just a couple ideas, was thinking about #2 when #1 hit me all the sudden.
Don't know if either is feasible just thought I'd throw them out there.

Chris

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** Chris Pinkham                  Linux v2.2.18, Sane v1.0.4, Cajun v3.0-8 **
** cpinkham@bc2va.org                          http://www.bc2va.org/chris/ **
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