[mythtv-users] Quick nuvexport question (encoding time)
Justin Kim
justinlkim at gmail.com
Sat Jul 8 13:41:19 UTC 2006
I have a quick question about encoding times in nuvexport.
I'm attempting to transcode a 1080 mpeg file to XviD. I used
all of the default settings nuvexport suggested when setting up the
transcode. The show has a cutlist and I set nuvexport to honor it.
My backend is an Athlon 64 3000+ on Fedora 4
My question is that the transcoding seems to be taking an
awfully long time. It's been running for about 2.5 days and is 39%
of the way through the first pass. Nuvexport claims .29fps, but is
seems to be running much slower than that.
My backend can usually two-pass high quality encode a DVD in
about 5 hours. Since this file is quite a bit larger
(dimension-wise, if not size-wise [4.1GB recording]) than a DVD .VOB
and because of the cutlist and denoising, I'm expecting that the
transcode will take longer than a DVD transcode.
However, the time nuvexport's taking seems to be rather
excessive and I was wondering if the transcode time I'm seeing now is
typical. I'll probably throw in the towel at some point, but I have
to confess that I'm a little curious about how long it'll take which
is why I haven't simply gone ahead and killed the transcoding
processes and started from scratch with different settings.
These are the commands I believe are associated with the
transcode I see in ps (yuvdenoise seems to be the big culprit):
18556 pts/1 S+ 0:00 /usr/bin/perl -w /usr/local/bin/nuvexport
18660 pts/1 S+ 0:02 /usr/bin/perl -w /usr/local/bin/nuvexport
18661 pts/1 S+ 0:00 sh -c /bin/nice -n19
/usr/bin/mythtranscode --showprogress -p autodetect -c 2235 -s
2006-07-04-20-00-00 -f "/tmp/fifodir_18556/" --honorcutlist 2>&1
18662 pts/1 SNl+ 18:47 /usr/bin/mythtranscode --showprogress -p
autodetect -c 2235 -s 2006-07-04-20-00-00 -f /tmp/fifodir_18556/
--honorcutlist
18668 pts/1 S+ 0:03 /usr/bin/perl -w /usr/local/bin/nuvexport
18669 pts/1 S+ 0:00 sh -c /bin/nice -n19 ffmpeg -f rawvideo -s
1920x1080 -r 29.970 -i /tmp/fifodir_18556/vidout -f yuv4mpegpipe - 2>
/dev/null | /bin/nice -n19 yuvdenoise 2> /dev/null | /bin/nice -n19
ffmpeg -y -f s16le -ar 48000 -ac 2 -i /tmp/fifodir_18556/audout -f
yuv4mpegpipe -s 1920x1080 -aspect 1.77777777777778 -r 29.970 -i -
-aspect 1.77777777777778 -r 29.970 -deinterlace -croptop 22
-cropright 38 -cropbottom 22 -cropleft 38 -s 624x352 -vcodec xvid
-b 960 -minrate 32 -maxrate 1920 -bt 32 -bufsize 65535 -lumi_mask
0.05 -dark_mask 0.02 -scplx_mask 0.5 -mv4 -part -pass 1 -passlogfile
'/tmp/xvid.18556.log' -f avi /dev/null 2>&1
18670 pts/1 SN+ 3:15 ffmpeg -f rawvideo -s 1920x1080 -r 29.970
-i /tmp/fifodir_18556/vidout -f yuv4mpegpipe -
18671 pts/1 DN+ 535:44 yuvdenoise
18672 pts/1 SN+ 38:40 ffmpeg -y -f s16le -ar 48000 -ac 2 -i
/tmp/fifodir_18556/audout -f yuv4mpegpipe -s 1920x1080 -aspect
1.77777777777778 -r 29.970 -i - -aspect 1.77777777777778 -r 29.970
-deinterlace -croptop 22 -cropright 38 -cropbottom 22 -cropleft 38 -s
624x352 -vcodec xvid -b 960 -minrate 32 -maxrate 1920 -bt 32 -bufsize
65535 -lumi_mask 0.05 -dark_mask 0.02 -scplx_mask 0.5 -mv4 -part
-pass 1 -passlogfile /tmp/xvid.18556.log -f avi /dev/null
Many thanks for any help!
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