dns 를 감사히 잘 쓰다. 

얼마전에야 칼무리를 알게 되어 시도해보는데. 

뜻대로 잘 안되네요. ㅠㅠ

알려주신대로 녹음에 스테레오 믹스로 바꾸고 했는데도 안되네요.

동영상 틀어 놓고 녹화하는 로그화일입니다. 뭐가 문제일까요. 

ffmpeg version 4.3.1
ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 10.2.1 (GCC) 20200726
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libgsm --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, dshow, from 'audio=@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{73221578-B71E-4B94-83A7-F176C8A686B6}':
  Duration: N/A, start: 66037.182000, bitrate: 1411 kb/s
    Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
[gdigrab @ 070af400]
[gdigrab @ 070af400] Found window Virtual_Screen, capturing 860x480x32 at (0,0)
Input #1, gdigrab, from 'title=Virtual_Screen':
  Duration: N/A, start: 1609819837.950795, bitrate: 395905 kb/s
    Stream #1:0: Video: bmp, bgra, 860x480, 395905 kb/s, 29.97 fps, 29.83 tbr, 
    Stream #1:0: Video: bmp, bgra, 860x480, 395905 kb/s, 29.97 fps, 29.83 tbr, 1000k tbn, 1000k tbc
Stream mapping:
  Stream #1:0 -> #0:0
  Stream #1:0 -> #0:0 (bmp (native) -> h264 (libx264))
  Stream #0:0 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 070b33c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 070b33c0] profile Constrained Baseline, level 3.1, 4:2:0, 8-bit
[libx264 @ 070b33c0]
[libx264 @ 070b33c0] 264 - core 161 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=7 lookahead_threads=7 sliced_threads=1 slices=7 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=25.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to 'C:\Users\blackmonk\Downloads\Kalmuri\K-002.mp4':
Output #0, mp4, to 'C:\Users\blackmonk\Downloads\Kalmuri\K-002.mp4':
  Metadata:
    encoder         : Lavf58.45.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 860x480, q=-1--1, 30 fps, 15360 tbn,
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 860x480, q=-1--1, 30 fps, 15360 tbn, 30 tbc
    Metadata:
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
    Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc58.91.100 aac
frame=   18 fps=0.0 q=22.0 size=       0kB time=00:00:00.96 bitrate=   0.4kbits/s speed= 1.9x    
frame=   34 fps= 34 q=23.0 size=       0kB time=00:00:01.45 bitrate=   0.3kbits/s speed=1.43x    
frame=   49 fps= 32 q=24.0 size=     256kB time=00:00:01.96 bitrate=1068.8kbits/s speed=1.29x    
frame=   64 fps= 32 q=24.0 size=     256kB time=00:00:02.44 bitrate= 856.5kbits/s speed=1.21x    
frame=   79 fps= 31 q=25.0 size=     256kB time=00:00:02.95 bitrate= 708.6kbits/s speed=1.17x    
frame=   94 fps= 31 q=25.0 size=     512kB time=00:00:03.44 bitrate=1216.7kbits/s speed=1.14x    
frame=  109 fps= 31 q=24.0 size=     512kB time=00:00:03.95 bitrate=1059.7kbits/s speed=1.12x    
frame=  125 fps= 31 q=26.0 size=     512kB time=00:00:04.44 bitrate= 943.5kbits/s speed= 1.1x    
frame=  140 fps= 31 q=27.0 size=     768kB time=00:00:04.95 bitrate=1269.3kbits/s speed=1.09x    
frame=  155 fps= 31 q=26.0 size=     768kB time=00:00:05.44 bitrate=1155.6kbits/s speed=1.08x    
frame=  170 fps= 31 q=26.0 size=    1024kB time=00:00:05.95 bitrate=1408.7kbits/s speed=1.07x    
frame=  185 fps= 30 q=27.0 size=    1280kB time=00:00:06.44 bitrate=1627.5kbits/s speed=1.06x    
frame=  202 fps= 31 q=24.0 size=    1280kB time=00:00:06.95 bitrate=1507.8kbits/s dup=1 drop=0 speed=1.06x    
frame=  217 fps= 31 q=26.0 size=    1280kB time=00:00:07.44 bitrate=1409.2kbits/s dup=1 drop=0 speed=1.05x    
frame=  232 fps= 31 q=25.0 size=    1536kB time=00:00:07.95 bitrate=1582.4kbits/s dup=1 drop=0 speed=1.05x    
frame=  247 fps= 30 q=26.0 size=    1536kB time=00:00:08.46 bitrate=1486.8kbits/s dup=1 drop=0 speed=1.04x    
frame=  262 fps= 30 q=29.0 size=    1792kB time=00:00:08.95 bitrate=1640.1kbits/s dup=1 drop=0 speed=1.04x    
frame=  277 fps= 30 q=27.0 size=    1792kB time=00:00:09.46 bitrate=1551.6kbits/s dup=1 drop=0 speed=1.04x    
frame=  293 fps= 30 q=27.0 size=    2048kB time=00:00:09.94 bitrate=1686.3kbits/s dup=1 drop=0 speed=1.03x    
frame=  308 fps= 30 q=27.0 size=    2304kB time=00:00:10.45 bitrate=1804.5kbits/s dup=1 drop=0 speed=1.03x    
frame=  323 fps= 30 q=27.0 size=    2304kB time=00:00:10.94 bitrate=1724.1kbits/s dup=1 drop=0 speed=1.03x    
frame=  338 fps= 30 q=25.0 size=    2560kB time=00:00:11.45 bitrate=1830.3kbits/s dup=1 drop=0 speed=1.03x    
frame=  353 fps= 30 q=27.0 size=    2560kB time=00:00:11.94 bitrate=1755.6kbits/s dup=1 drop=0 speed=1.03x    
frame=  368 fps= 30 q=24.0 size=    2816kB time=00:00:12.45 bitrate=1851.9kbits/s dup=1 drop=0 speed=1.03x    
frame=  383 fps= 30 q=25.0 size=    2816kB time=00:00:12.94 bitrate=1782.1kbits/s dup=1 drop=0 speed=1.02x    
frame=  398 fps= 30 q=25.0 size=    2816kB time=00:00:13.45 bitrate=1714.5kbits/s dup=1 drop=0 speed=1.02x    
frame=  414 fps= 30 q=24.0 size=    3072kB time=00:00:13.94 bitrate=1804.9kbits/s dup=1 drop=0 speed=1.02x    
frame=  429 fps= 30 q=24.0 size=    3072kB time=00:00:14.45 bitrate=1741.1kbits/s dup=1 drop=0 speed=1.02x    
frame=  444 fps= 30 q=23.0 size=    3328kB time=00:00:14.94 bitrate=1824.7kbits/s dup=1 drop=0 speed=1.02x    
[gdigrab @ 070af400]
[gdigrab @ 070af400] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
frame=  456 fps= 30 q=24.0 Lsize=    3488kB time=00:00:15.49 bitrate=1843.5kbits/s dup=1 drop=0 speed=1.01x    
video:3216kB audio:255kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.481021%
[libx264 @ 070b33c0]
[libx264 @ 070b33c0] frame I:2     Avg QP:22.00  size: 17274
[libx264 @ 070b33c0] frame P:454   Avg QP:24.76  size:  7177
[libx264 @ 070b33c0] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 070b33c0] mb P  I16..4: 18.3%  0.0%  0.0%  P16..4: 53.9%  0.0%  0.0%  0.0%  0.0%    skip:27.8%
[libx264 @ 070b33c0] coded y,uvDC,uvAC intra: 17.1% 52.8% 13.8% inter: 21.0% 33.8% 1.9%
[libx264 @ 070b33c0] i16 v,h,dc,p: 42% 17% 22% 20%
[libx264 @ 070b33c0] i8c dc,h,v,p: 42% 15% 30% 14%
[libx264 @ 070b33c0] kb/s:1733.13
[aac @ 070b54c0] Qavg: 224.973