[MEncoder-users] Is it possible to do IVTC on video from the HD-PVR?

[Andrew Berg]

I recorded a show with the HD-PVR that I know was recorded at 24p and
telecined to 30i for broadcast. I have a working command line for shows
for deinterlacing 30i content (most of what I record is originally
recorded at 30i):

mencoder in.ts -demuxer lavf -fps 60000/1001 -ofps 30000/1001 -of avi
-oac copy -ovc x264 -x264encopts [x264 options] -vf
yadif=1,framestep=2,harddup -o out.avi

I've tried various combinations of -fps/-ofps values and filmdint=io=
values with no luck. Someone on this list provided a script to determine
if a video is telecined, and according to it, these videos are not
telecined:
> Detecting telecine'd content
> #  of telecine'd frames detected in a ~1 second sample of video
> at various offsets:
> # 0 x -62348618 = 0: 0
> # 1 x -62348618 = -62348618: 0
> # 2 x -62348618 = -124697236: 0
> # 3 x -62348618 = -187045854: 0
> # 4 x -62348618 = -249394472: 0
> # 5 x -62348618 = -311743090: 0
> # 6 x -62348618 = -374091708: 0
> # 7 x -62348618 = -436440326: 0
> # 8 x -62348618 = -498788944: 0
> # 9 x -62348618 = -561137562: 0
> # 10 x -62348618 = -623486180: 0
> # 11 x -62348618 = -685834798: 0
> # 12 x -62348618 = -748183416: 0
> # 13 x -62348618 = -810532034: 0
> # 14 x -62348618 = -872880652: 0
> # 15 x -62348618 = -935229270: 0
> # 16 x -62348618 = -997577888: 0
> # 17 x -62348618 = -1059926506: 0
> # 18 x -62348618 = -1122275124: 0
> # 19 x -62348618 = -1184623742: 0
> TOTAL=0
> TARGET=290
> TELECINE=false
Perhaps the script doesn't detect telecine and normal IVTC is impossible
with these videos because the capture is analog-to-digital, but it can't
hurt to see if someone knows a way. Looking around on Google, someone
suggested using Avisynth's TDecimate(), but I need to do these
transcodes on a Linux box, so Avisynth isn't an option. decimate or detc
may be useful, but I don't know how I would configure them to fit this
situation.