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  1.  ffmpeg -s 1366x768 -f x11grab -framerate 10 -i :0.0 -c libx264 -crf 28 -preset ultrafast output.mp4
  2. ffmpeg version 3.1.4-1~bpo8+1 Copyright (c) 2000-2016 the FFmpeg developers
  3.   built with gcc 4.9.2 (Debian 4.9.2-10)
  4.   configuration: --prefix=/usr --extra-version='1~bpo8+1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-libtesseract --disable-stripping --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --disable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librubberband --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-frei0r --enable-chromaprint --enable-libopencv --enable-libx264
  5.   libavutil      55. 28.100 / 55. 28.100
  6.   libavcodec     57. 48.101 / 57. 48.101
  7.   libavformat    57. 41.100 / 57. 41.100
  8.   libavdevice    57.  0.101 / 57.  0.101
  9.   libavfilter     6. 47.100 /  6. 47.100
  10.   libavresample   3.  0.  0 /  3.  0.  0
  11.   libswscale      4.  1.100 /  4.  1.100
  12.   libswresample   2.  1.100 /  2.  1.100
  13.   libpostproc    54.  0.100 / 54.  0.100
  14. [x11grab @ 0x14eaa20] Stream #0: not enough frames to estimate rate; consider increasing probesize
  15. Input #0, x11grab, from ':0.0':
  16.   Duration: N/A, bitrate: N/A
  17.     Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1366x768, 10 fps, 1000k tbr, 1000k tbn, 1000k tbc
  18. No pixel format specified, yuv444p for H.264 encoding chosen.
  19. Use -pix_fmt yuv420p for compatibility with outdated media players.
  20. [libx264 @ 0x14f4320] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
  21. [libx264 @ 0x14f4320] profile High 4:4:4 Predictive, level 3.2, 4:4:4 8-bit
  22. [libx264 @ 0x14f4320] 264 - core 142 r2431 a5831aa - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - 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=6 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=10 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=28.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
  23. [mp4 @ 0x14f3180] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  24. Output #0, mp4, to 'output.mp4':
  25.   Metadata:
  26.     encoder         : Lavf57.41.100
  27.     Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 1366x768, q=-1--1, 10 fps, 10240 tbn, 10 tbc
  28.     Metadata:
  29.       encoder         : Lavc57.48.101 libx264
  30.     Side data:
  31.       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  32. Stream mapping:
  33.   Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  34. Press [q] to stop, [?] for help
  35. [swscaler @ 0x15000a0] Warning: data is not aligned! This can lead to a speedloss
  36. frame=    3 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=    3 fps=2.7 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=    3 fps=1.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=    3 fps=1.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=    3 fps=1.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 dro*** dropping frame 3 from stream 0 at ts 0
  37.     Last message repeated 1 times
  38. frame=    3 fps=0.9 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 dro*** dropping frame 3 from stream 0 at ts 0
  39.     Last message repeated 4 times
  40. frame=    3 fps=0.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 dro*** dropping frame 3 from stream 0 at ts 0
  41.     Last message repeated 2 times
  42. cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  43. [rawvideo @ 0x14f2ce0] PACKET SIZE: 4196352, STRIDE: 5464
  44. *** dropping frame 3 from stream 0 at ts 0
  45. cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  46. [rawvideo @ 0x14f2ce0] PACKET SIZE: 4196352, STRIDE: 5464
  47. *** dropping frame 3 from stream 0 at ts 0
  48. frame=    3 fps=0.7 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drocur_dts is invalid (this is harmless if it occurs once at the start per stream)
  49. [rawvideo @ 0x14f2ce0] PACKET SIZE: 4196352, STRIDE: 5464
  50. *** dropping frame 3 from stream 0 at ts 0
  51. cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  52. [rawvideo @ 0x14f2ce0] PACKET SIZE: 4196352, STRIDE: 5464
  53. *** dropping frame 3 from stream 0 at ts 0
  54. cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  55. [rawvideo @ 0x14f2ce0] PACKET SIZE: 4196352, STRIDE: 5464
  56. *** dropping frame 3 from stream 0 at ts 0
  57. cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  58. [rawvideo @ 0x14f2ce0] PACKET SIZE: 4196352, STRIDE: 5464
  59. *** dropping frame 3 from stream 0 at ts 0
  60. cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  61. [rawvideo @ 0x14f2ce0] PACKET SIZE: 4196352, STRIDE: 5464
  62. *** dropping frame 3 from stream 0 at ts 0
  63. frame=    3 fps=0.6 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drocur_dts is invalid (this is harmless if it occurs once at the start per stream)
  64. [rawvideo @ 0x14f2ce0] PACKET SIZE: 4196352, STRIDE: 5464
  65. *** dropping frame 3 from stream 0 at ts 0
  66. cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  67. [rawvideo @ 0x14f2ce0] PACKET SIZE: 4196352, STRIDE: 5464
  68. *** dropping frame 3 from stream 0 at ts 0
  69. cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  70. [rawvideo @ 0x14f2ce0] PACKET SIZE: 4196352, STRIDE: 5464
  71. *** dropping frame 3 from stream 0 at ts 0
  72. [libx264 @ 0x14f4320] frame=   0 QP=25.00 NAL=3 Slice:I Poc:0   I:4128 P:0    SKIP:0    size=214414 bytes
  73. [libx264 @ 0x14f4320] frame=   1 QP=28.00 NAL=2 Slice:P Poc:2   I:0    P:10   SKIP:4118 size=63 bytes
  74. [libx264 @ 0x14f4320] frame=   2 QP=29.00 NAL=2 Slice:P Poc:4   I:928  P:476  SKIP:2724 size=88050 bytes
  75. frame=    3 fps=0.6 q=-1.0 Lsize=     297kB time=00:00:00.20 bitrate=12152.4kbits/s dup=0 drop=51 speed=0.0385x    
  76. video:296kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.274473%
  77. Input file #0 (:0.0):
  78.   Input stream #0:0 (video): 54 packets read (226603008 bytes); 54 frames decoded;
  79.   Total: 54 packets (226603008 bytes) demuxed
  80. Output file #0 (output.mp4):
  81.   Output stream #0:0 (video): 3 frames encoded; 3 packets muxed (303126 bytes);
  82.   Total: 3 packets (303126 bytes) muxed
  83. 54 frames successfully decoded, 0 decoding errors
  84. [AVIOContext @ 0x14f7260] Statistics: 34 seeks, 37 writeouts
  85. [libx264 @ 0x14f4320] frame I:1     Avg QP:25.00  size:214414
  86. [libx264 @ 0x14f4320] frame P:2     Avg QP:28.50  size: 44056
  87. [libx264 @ 0x14f4320] mb I  I16..4: 100.0%  0.0%  0.0%
  88. [libx264 @ 0x14f4320] mb P  I16..4: 11.2%  0.0%  0.0%  P16..4:  5.9%  0.0%  0.0%  0.0%  0.0%    skip:82.9%
  89. [libx264 @ 0x14f4320] coded y,u,v intra: 33.5% 28.2% 27.9% inter: 4.5% 3.7% 3.5%
  90. [libx264 @ 0x14f4320] i16 v,h,dc,p: 52% 42%  4%  2%
  91. [libx264 @ 0x14f4320] kb/s:8067.39
  92. Exiting normally, received signal 2.
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