ffmpeg map_channels

D:\ffmpeg-64>bin\ffmpeg -probesize 500000000 -i sample-uncompressed-lr-audio.mov -vcodec libx264 -map_channel 0.1.0 -map_channel 0.1.1 output.mp4
ffmpeg version N-53033-g56ba331 Copyright (c) 2000-2013 the FFmpeg developers
  built on May 13 2013 22:23:31 with gcc 4.7.3 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-li
bass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-li
bopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52. 31.100 / 52. 31.100
  libavcodec     55.  9.100 / 55.  9.100
  libavformat    55.  7.100 / 55.  7.100
  libavdevice    55.  0.100 / 55.  0.100
  libavfilter     3. 65.100 /  3. 65.100
  libswscale      2.  3.100 /  2.  3.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample-uncompressed-lr-audio.mov':
  Metadata:
    creation_time   : 2013-05-18 09:54:24
  Duration: 00:00:07.77, start: 0.000000, bitrate: 1345562 kb/s
    Stream #0:0(eng): Video: v210 (v210 / 0x30313276), yuv422p10le, 1920x1080, 1327104 kb/s, SAR 1:1 DAR 16:9, 30 fps, 30 tbr, 3k tbn, 3k tbc
    Metadata:
      creation_time   : 2013-05-18 09:54:24
      handler_name    : Apple Alias Data Handler
    Stream #0:1(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 16 channels, s32, 18432 kb/s
    Metadata:
      creation_time   : 2013-05-18 09:54:24
      handler_name    : Apple Alias Data Handler
File 'output.mp4' already exists. Overwrite ? [y/N] y
No pixel format specified, yuv422p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
-map_channel is forwarded to lavfi similarly to -af pan=0x3:c0=c0:c1=c1.
[pan @ 000000000033b900] This syntax is deprecated. Use '|' to separate the list items.
[pan @ 000000000033b900] Pure channel mapping detected: M M
[libx264 @ 00000000026e6c00] using SAR=1/1
[libx264 @ 00000000026e6c00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 00000000026e6c00] profile High 4:2:2, level 4.0, 4:2:2 8-bit
[libx264 @ 00000000026e6c00] 264 - core 132 r2309 3b1f1f7 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options:  cabac=1 ref=3 deblock=1:0:0
analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 look
ahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 k
eyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
  Metadata:
    encoder         : Lavf55.7.100
    Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv422p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 15360 tbn, 30 tbc
    Metadata:
      creation_time   : 2013-05-18 09:54:24
      handler_name    : Apple Alias Data Handler
    Stream #0:1(eng): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
    Metadata:
      creation_time   : 2013-05-18 09:54:24
      handler_name    : Apple Alias Data Handler
Stream mapping:
  Stream #0:0 -> #0:0 (v210 -> libx264)
  Stream #0:1 -> #0:1 (pcm_s24le -> libvo_aacenc)
Press [q] to stop, [?] for help
frame=  233 fps= 46 q=-1.0 Lsize=     648kB time=00:00:07.77 bitrate= 682.5kbits/s
video:516kB audio:122kB subtitle:0 global headers:0kB muxing overhead 1.504247%
[libx264 @ 00000000026e6c00] frame I:1     Avg QP:20.51  size:412238
[libx264 @ 00000000026e6c00] frame P:58    Avg QP:21.28  size:  1356
[libx264 @ 00000000026e6c00] frame B:174   Avg QP:24.47  size:   212
[libx264 @ 00000000026e6c00] consecutive B-frames:  0.4%  0.0%  0.0% 99.6%
[libx264 @ 00000000026e6c00] mb I  I16..4: 19.8% 43.1% 37.1%
[libx264 @ 00000000026e6c00] mb P  I16..4:  0.1%  0.1%  0.0%  P16..4:  5.6%  0.1%  0.3%  0.0%  0.0%    skip:93.8%
[libx264 @ 00000000026e6c00] mb B  I16..4:  0.1%  0.0%  0.0%  B16..8:  1.1%  0.0%  0.0%  direct: 0.0%  skip:98.8%  L0:15.5% L1:83.8% BI: 0.6%
[libx264 @ 00000000026e6c00] 8x8 transform intra:35.4% inter:79.0%
[libx264 @ 00000000026e6c00] coded y,uvDC,uvAC intra: 59.6% 58.9% 39.2% inter: 0.1% 1.2% 0.0%
[libx264 @ 00000000026e6c00] i16 v,h,dc,p: 15% 70%  4% 10%
[libx264 @ 00000000026e6c00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  9% 21% 24%  6%  8%  5% 11%  5% 11%
[libx264 @ 00000000026e6c00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 21% 16%  7%  8%  6% 11%  7% 11%
[libx264 @ 00000000026e6c00] i8c dc,h,v,p: 43% 37% 13%  8%
[libx264 @ 00000000026e6c00] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 00000000026e6c00] ref P L0: 78.7%  0.9% 14.5%  6.0%
[libx264 @ 00000000026e6c00] ref B L0: 71.8% 23.0%  5.2%
[libx264 @ 00000000026e6c00] ref B L1: 81.9% 18.1%
[libx264 @ 00000000026e6c00] kb/s:543.68