[mythtv] New MPEG2 commercial-cut code ready for testing

[Robin Gilks]

> Here's another one:
> http://www.pblue.org/myth/mpeg2fix-0.10.tgz
>
> Should fix:
> Cory's problem with an abort that looked like:
> Need to insert 139 frames > max allowed: 20
>
> Bryan's problem with an infinite loop (or a failed assert)
>
> Sort of fixes:
> Cory's blockiness.  Basically I just forced the quality to be at level
2.  Makes it better, but doesn't necessarily fix the underlying
> problem.  There may be other contols that can be sent to the encoder.
you can play with the line that says 'c->qmax =' to try different
values, lower is better (and bigger) with '1' being the smallest
allowed.  qmax must be >= qmin.  largest allowed  size is 31
>
>
> Possibly fixes:
> Robin's hang.  Assuming it is the same issue Bryan was having.
>
> The crash in avcdec_encode, if it was due to an alignment issue (I have
applied the relevant alignment requested earlier)
>
> Let me know how it goes.
>

Works for me now - the infinte loop appears to have gone (I've tried
different cut point to check this!!)

This is the output from the processing of a 1 hour show with 3 breaks
being edited out. I still get the odd QMAT_SHIFT warnings (whatever they
mean).

One question Geoff - is the whitespace required around the dash in the
cutpoint frame number range? Guess I'll have to try it :-)

./mpeg2fix -i /mnt/store/2056_20051101113000.mpg -o /mnt/tmp/xxx.mpg -c
"28378 - 30050" -c "60121 - 61919" -c "87697 - 89795" -f mpeg2
Opening /mnt/store/2056_20051101113000.mpg
Input #0, mpeg, from '/mnt/store/2056_20051101113000.mpg':
  Duration: N/A, bitrate: N/A
  Stream #0.0[0x1e0], 25.00 fps: Video: mpeg2video, yuv420p, 480x480, 8000
kb/s
  Stream #0.1[0x1c0]: Audio: mp2, 48000 Hz, stereo, 256 kb/s
#0 PTS:36037 Delta: 0.000000ms queue: 21
#1 PTS:35649 Delta: 4.311111ms queue: 2
Mux rate: 8.39 Mbit/s
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 9 to an I-frame ((null))
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 10 to an I-frame ((null))
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 11 to an I-frame ((null))
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 0 to an I-frame ((null))
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 1 to an I-frame ((null))
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 9 to an I-frame ((null))
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 10 to an I-frame ((null))
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 11 to an I-frame ((null))
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 0 to an I-frame ((null))
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 1 to an I-frame ((null))
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 9 to an I-frame ((null))
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 10 to an I-frame ((null))
Warning, QMAT_SHIFT is larger then 21, overflows possible
Converting frame 11 to an I-frame ((null))


-- 
Robin Gilks