Decomb ineffective?

[jtfine]

I noticed most "special feature" items from any dvd/BD appear to be interlaced, with ugly combing. I've tried both the deinterlace and decomb filters, neither of which has produced a clean result.

-The deinterlace (slowest) looks smudged and distorted.
-The decomb filter (set to Default) removed most of the combing, but leaves very visible combing artifacts around the edges of all motion. It does not look like the nice clean examples shown here: https://trac.handbrake.fr/wiki/Decomb

Am I using it wrong, or is that the best it can do?

Thanks!

[thompson]

Activity Log? Screen cap showing the combing/artifacts?

[jtfine]

Here's a screenshot + log. But this is not a specific case. It does the same thing for any interlaced source I use.

Code: Select all

# Windows GUI 0.9.5 2011010300
# Running: Microsoft Windows NT 6.0.6002 Service Pack 2
# CPU: Intel(R) Core(TM)2 Duo CPU     E6750  @ 2.66GHz
# Ram: 3581 MB
# Screen: 1680x1050
# Temp Dir: [removed]
# Install Dir: C:\Program Files\Handbrake
# Data Dir: [removed]\HandBrake\HandBrake\0.9.5.3728

# CLI Query:  -i "[removed]" -t 21 -c 1-2 -o "[removed]"  -f mp4 --decomb --strict-anamorphic  -e x264 -q 18.75 -a 1 -E faac -6 dpl2 -R 48 -B 160 -D 0.0 --markers="[removed]" -x ref=2:bframes=2:subq=6:mixed-refs=0:weightb=0:8x8dct=0:trellis=0 --verbose=1 --no-dvdnav
# User Query: False
-------------------------------------------

[20:51:56] hb_init: checking cpu count
[20:51:56] hb_init: starting libhb thread
HandBrake 0.9.5 (2011010300) - MinGW i386 - http://handbrake.fr
2 CPUs detected
Opening [removed]...
[20:51:56] hb_scan: path=[removed], title_index=21
[20:51:56] scan: BD has 47 title(s)
[20:51:56] bd: scanning title 21
[20:51:56] bd: duration is 00:00:59 (59025 ms)
[20:51:56] bd: video id=1011, stream type=MPEG2, format 480i
[20:51:56] bd: aspect = 1.77778
[20:51:56] bd: checking audio 1
[20:51:56] bd: audio id=1100, lang=English (AC3), 3cc=eng
[20:51:56] bd: chap 1 packet=0, 58958 ms
[20:51:56] bd: chap 2 packet=48112320, 66 ms
[20:51:56] bd: title 21 has 2 chapters
[20:51:56] scan: decoding previews for title 21
[20:51:56] scan: title angle(s) 1
[20:51:56] scan: audio 0x1100: AC-3, rate=48000Hz, bitrate=192000 English (AC3) (2.0 ch)
Scanning title 21...
[20:51:56] scan: 10 previews, 720x480, 29.970 fps, autocrop = 0/0/0/0, aspect 16:9, PAR 32:27
[20:51:56] Title is likely interlaced or telecined (7 out of 10 previews). You should do something about that.
[20:51:56] stream: 52 good frames, 9 errors (17%)
[20:51:56] scan: title (0) job->width:720, job->height:400
[20:51:56] libhb: scan thread found 1 valid title(s)
+ title 21:
  + duration: 00:00:59
  + size: 720x480, pixel aspect: 32/27, display aspect: 1.78, 29.970 fps
  + autocrop: 0/0/0/0
  + chapters:
    + 1: cells 0->0, 0 blocks, duration 00:00:59
    + 2: cells 0->0, 0 blocks, duration 00:00:00
  + audio tracks:
    + 1, English (AC3) (2.0 ch) (iso639-2: eng), 48000Hz, 192000bps
  + subtitle tracks:
    + 1, Closed Captions (iso639-2: eng) (Text)(CC)
  + combing detected, may be interlaced or telecined
Reading chapter markers from file [removed].csv
[20:51:57] 1 job(s) to process
[20:51:57] starting job
[20:51:57] work: sanitizing track 0 mixdown Dolby Pro Logic II to Stereo
[20:51:57] sync: expecting 1798 video frames
[20:51:57] job configuration:
[20:51:57]  * source
[20:51:57]    + [removed]
[20:51:57]    + title 21, chapter(s) 1 to 2
[20:51:57]  * destination
[20:51:57]    + [removed].m4v
[20:51:57]    + container: MPEG-4 (.mp4 and .m4v)
[20:51:57]      + chapter markers
[20:51:57]  * video track
[20:51:57]    + decoder: mpeg2
[20:51:57]      + bitrate 10000 kbps
[20:51:57]    + frame rate: same as source (around 29.970 fps)
[20:51:57]    + strict anamorphic
[20:51:57]      + storage dimensions: 720 * 480 -> 720 * 480, crop 0/0/0/0, mod 0
[20:51:57]      + pixel aspect ratio: 32 / 27
[20:51:57]      + display dimensions: 853 * 480
[20:51:57]    + filter
[20:51:57]      + Decomb (default settings)
[20:51:57]    + encoder: x264
[20:51:57]      + options: ref=2:bframes=2:subq=6:mixed-refs=0:weightb=0:8x8dct=0:trellis=0
[20:51:57]      + quality: 18.75 (RF)
[20:51:57]  * audio track 0
[20:51:57]    + decoder: English (AC3) (2.0 ch) (track 1, id 1100)
[20:51:57]      + bitrate: 192 kbps, samplerate: 48000 Hz
[20:51:57]    + mixdown: Stereo
[20:51:57]    + encoder: faac
[20:51:57]      + bitrate: 160 kbps, samplerate: 48000 Hz
[20:51:57] encx264: min-keyint: auto (29), keyint: 300
[20:51:57] encx264: encoding with stored aspect 32/27
[20:51:57] encx264: Encoding at constant RF 18.750000
x264 [info]: using SAR=32/27
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
x264 [info]: profile Main, level 3.0
No accelerated IMDCT transform found
[20:51:57] yadif thread started for segment 0
[20:51:57] decomb thread started for segment 0
[20:51:57] reader: first SCR 377823005 id 4113 DTS 377903997
[20:51:57] mpeg2: "Chapter 1" (1) at frame 0 time 9009
[20:51:57] sync: first pts is 6006
[20:51:57] yadif thread started for segment 1
[20:51:57] decomb thread started for segment 1
[20:52:43] stream: 1769 good frames, 0 errors (0%)
[20:52:43] reader: done. 1 scr changes
[20:52:43] mpeg2: "Chapter 2" (2) at frame 1755 time 5279274
[20:52:44] work: average encoding speed for job is 37.657635 fps
[20:52:44] sync: got 1767 frames, 1798 expected
[20:52:44] mpeg2 done: 1767 frames
[20:52:44] render: lost time: 0 (0 frames)
[20:52:44] render: gained time: 0 (0 frames) (0 not accounted for)
x264 [info]: frame I:116   Avg QP:15.46  size: 21082  PSNR Mean Y:51.16 U:54.62 V:54.93 Avg:51.97 Global:48.95
x264 [info]: frame P:1146  Avg QP:19.13  size:  6932  PSNR Mean Y:48.37 U:51.20 V:51.19 Avg:48.86 Global:46.64
x264 [info]: frame B:504   Avg QP:20.90  size:  2155  PSNR Mean Y:52.26 U:54.26 V:53.82 Avg:51.79 Global:46.31
x264 [info]: consecutive B-frames: 43.6% 42.2% 14.2%
x264 [info]: mb I  I16..4: 41.5%  0.0% 58.5%
x264 [info]: mb P  I16..4:  7.1%  0.0%  8.1%  P16..4: 41.8% 11.1%  5.4%  0.0%  0.0%    skip:26.6%
x264 [info]: mb B  I16..4:  5.8%  0.0%  0.6%  B16..8: 24.2%  5.3%  0.3%  direct:12.9%  skip:50.8%  L0:34.0% L1:52.4% BI:13.6%
x264 [info]: coded y,uvDC,uvAC intra: 59.9% 68.5% 40.5% inter: 15.4% 24.1% 1.3%
x264 [info]: i16 v,h,dc,p: 44% 22% 15% 20%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 28% 20%  4%  6%  6%  6%  4%  4%
x264 [info]: i8c dc,h,v,p: 53% 24% 17%  6%
x264 [info]: Weighted P-Frames: Y:12.7% UV:8.6%
x264 [info]: ref P L0: 69.1% 11.2% 18.4%  1.2%
x264 [info]: ref B L0: 83.6% 16.4%
x264 [info]: ref B L1: 97.8%  2.2%
x264 [info]: SSIM Mean Y:0.9859233 (18.515db)
x264 [info]: PSNR Mean Y:49.665 U:52.304 V:52.189 Avg:49.905 Global:46.659 kb/s:1556.27
[20:52:44] mux: track 0, 1766 frames, 11474376 bytes, 1554.29 kbps, fifo 8
[20:52:44] mux: track 1, 2768 frames, 1163491 bytes, 157.60 kbps, fifo 256
[20:52:44] decomb: deinterlaced 473 | blended 12 | unfiltered 1281 | total 1766
[20:52:44] libhb: work result = 0
Rip done!
HandBrake has exited.