Tvheadend

Hi,
i just downloaded from git repository today newest sources and tried to transcode channels to lower ressolution with transcoding capability, for SD channels everything works very well, but for HD i got overflow and errors and there video is choppy.

Log for HD channel:

2013-11-27 21:15:55.767 [   INFO]:HTTP: ZZZ.ZZZ.ZZZ.ZZZ: using ticket 1440063D457E0B4DF9EA7F38ED2B871C861BA1B0 for /stream/channelid/1912621878
2013-11-27 21:15:55.768 [   INFO]:subscription: "HTTP" subscribing on "CHANNEL HD", weight: 100, adapter: "/dev/dvb/adapter0/frontend0", network: "NCT" 
, mux: "11508V", provider: "TVN", service: "CHANNEL HD" 
2013-11-27 21:15:56.168 [   INFO]:transcode: 1:H264 1920x1088 ==> H264 848x480
2013-11-27 21:15:56.171 [   INFO]:transcode: 2:MPEG2AUDIO ==> AAC
2013-11-27 21:15:57.131 [  ERROR]:libav: mmco: unref short failure
2013-11-27 21:15:57.144 [ NOTICE]:libav: using SAR=1/1
2013-11-27 21:15:57.150 [ NOTICE]:libav: using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
2013-11-27 21:15:57.152 [ NOTICE]:libav: profile Constrained Baseline, level 3.0
2013-11-27 21:15:57.152 [ NOTICE]:libav: 264 - core 123 r2189 35cf912 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html
 - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 
cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bfram
es=0 weightp=0 keyint=25 keyint_min=2 scenecut=40 intra_refresh=0 rc_lookahead=25 rc=abr mbtree=1 bitrate=814 ratetol=1.0 qcomp=0.60 qpmin=10 qpmax=30 
qpstep=4 vbv_maxrate=3670 vbv_bufsize=1835 nal_hrd=none ip_ratio=1.41 aq=1:1.00
2013-11-27 21:15:57.257 [  ERROR]:libav: mmco: unref short failure
2013-11-27 21:15:57.532 [  ERROR]:libav: mmco: unref short failure
2013-11-27 21:15:58.654 [ NOTICE]:libav: muxrate VBR, 
2013-11-27 21:15:58.654 [ NOTICE]:libav: pcr every 2 pkts, sdt every 200, pat/pmt every 40 pkts

*2013-11-27 21:16:05.645 [WARNING]:linuxdvb: /dev/dvb/adapter0/frontend0 - read() EOVERFLOW
2013-11-27 21:16:05.645 [WARNING]:TS: 11508V/CHANNEL HD: CA @ #1121: Continuity counter error
2013-11-27 21:16:05.657 [WARNING]:TS: 11508V/CHANNEL HD: H264 @ #532: Continuity counter error
2013-11-27 21:16:05.657 [WARNING]:TS: 11508V/CHANNEL HD: AC3 @ #821: Continuity counter error
2013-11-27 21:16:05.657 [WARNING]:TS: 11508V/CHANNEL HD: MPEG2AUDIO @ #820: Continuity counter error
2013-11-27 21:16:05.657 [WARNING]:TS: 11508V/CHANNEL HD: TELETEXT @ #591: Continuity counter error
2013-11-27 21:16:05.658 [WARNING]:TS: 11508V/CHANNEL HD: CA @ #1421: Continuity counter error

*

and log for SD channel - everything OK:

2013-11-27 21:54:42.165 [   INFO]:subscription: "HTTP" subscribing on "CHANNEL SD", weight: 100, adapter: "/dev/dvb/adapter0/frontend0", network: "NCT" 
, mux: "10719V", provider: "nc+", service: "CHANNEL SD" 
2013-11-27 21:54:42.201 [   INFO]:transcode: 1:MPEG2VIDEO 704x576 ==> H264 586x480
2013-11-27 21:54:42.203 [   INFO]:transcode: 2:MPEG2AUDIO ==> AAC
2013-11-27 21:54:42.490 [ NOTICE]:libav: using SAR=16/11
2013-11-27 21:54:42.509 [ NOTICE]:libav: using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
2013-11-27 21:54:42.513 [ NOTICE]:libav: profile Constrained Baseline, level 3.0
2013-11-27 21:54:42.513 [ NOTICE]:libav: 264 - core 123 r2189 35cf912 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html
 - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 
cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bfram
es=0 weightp=0 keyint=25 keyint_min=2 scenecut=40 intra_refresh=0 rc_lookahead=25 rc=abr mbtree=1 bitrate=562 ratetol=1.0 qcomp=0.60 qpmin=10 qpmax=30 
qpstep=4 vbv_maxrate=3670 vbv_bufsize=1835 nal_hrd=none ip_ratio=1.41 aq=1:1.00
2013-11-27 21:54:43.560 [ NOTICE]:libav: muxrate VBR, 
2013-11-27 21:54:43.560 [ NOTICE]:libav: pcr every 2 pkts, sdt every 200, pat/pmt every 40 pkts
2013-11-27 21:54:59.169 [   INFO]:mpegts: 10719V - initial scan timed out
2013-11-27 21:54:59.169 [   INFO]:mpegts: 10719V - initial scan complete
2013-11-27 21:56:03.514 [WARNING]:webui: Stop streaming /stream/channelid/221301896?ticket=F888B4E1C4BFBBAFC39F19FF1EB7B5FE86C50FBF&mux=mpegts&transcod
e=1&resolution=480&acodec=AAC&vcodec=H264&scodec=NONE, muxer reported errors
2013-11-27 21:56:03.514 [   INFO]:subscription: "HTTP" unsubscribing from "CHANNEL SD" 
2013-11-27 21:56:03.536 [ NOTICE]:libav: frame I:88    Avg QP:21.99  size: 21385
2013-11-27 21:56:03.536 [ NOTICE]:libav: frame P:1921  Avg QP:23.20  size:  3651
2013-11-27 21:56:03.536 [ NOTICE]:libav: mb I  I16..4: 43.0%  0.0% 57.0%
2013-11-27 21:56:03.536 [ NOTICE]:libav: mb P  I16..4:  1.5%  0.0%  1.1%  P16..4: 36.2%  8.4%  3.0%  0.0%  0.0%    skip:49.9%
2013-11-27 21:56:03.536 [ NOTICE]:libav: final ratefactor: -34.69
2013-11-27 21:56:03.536 [ NOTICE]:libav: coded y,uvDC,uvAC intra: 48.1% 73.3% 39.5% inter: 12.3% 26.1% 3.2%
2013-11-27 21:56:03.536 [ NOTICE]:libav: i16 v,h,dc,p: 35% 32%  6% 26%
2013-11-27 21:56:03.536 [ NOTICE]:libav: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 21% 15%  6%  7%  8%  5%  7%  5%
2013-11-27 21:56:03.536 [ NOTICE]:libav: i8c dc,h,v,p: 47% 28% 17%  8%
2013-11-27 21:56:03.536 [ NOTICE]:libav: ref P L0: 80.5% 11.8%  7.7%
2013-11-27 21:56:03.536 [ NOTICE]:libav: kb/s:0.25
2013-11-27 21:56:10.008 [   INFO]:epgdb: saved
2013-11-27 21:56:10.008 [   INFO]:epgdb:   brands     0
2013-11-27 21:56:10.008 [   INFO]:epgdb:   seasons    0
2013-11-27 21:56:10.008 [   INFO]:epgdb:   episodes   354
2013-11-27 21:56:10.008 [   INFO]:epgdb:   broadcasts 354

What can be a problem?