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  • Prevent output in error log when ffmpeg job is initiated via PHP's shell_exec()

    19 janvier 2016, par Jake

    I’m getting the entire output of the ffmpeg command printed to my server’s error.log — but as far as I can tell, the jobs complete successfully with no error.

    Is there any way to suppress the output ? I have seen people append stuff like >/dev/null 2>/dev/null & to their command, however that forces the command to return immediately and the job runs in the background. Unfortunately, I need the job to run in the foreground, because I need to do stuff with the output once the job is done.

    Here’s the command I am running...

    shell_exec('ffmpeg -i input.mp4 -f mp4 -c:v libx264 -preset slow -crf 24 -s 1280x720 -c:a libfdk_aac -profile:a aac_he -ar 22050 -b:a 64k -movflags +faststart output-1280x720.mp4');

    Here’s the output I am seeing...

    [Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX] ffmpeg version N-77432-gc0f67e1 Copyright (c) 2000-2015 the FFmpeg developers
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   built with gcc 4.4.5 (Debian 4.4.5-8)
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   configuration: --prefix=/usr --enable-nonfree --enable-libfreetype --enable-gpl --enable-libx264 --enable-x11grab --enable-zlib --enable-libvpx --enable-libtheora --enable-libvorbis --enable-libfdk-aac --enable-libmp3lame --enable-libopus
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   libavutil      55. 11.100 / 55. 11.100
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   libavcodec     57. 19.100 / 57. 19.100
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   libavformat    57. 20.100 / 57. 20.100
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   libavdevice    57.  0.100 / 57.  0.100
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   libavfilter     6. 21.100 /  6. 21.100
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   libswscale      4.  0.100 /  4.  0.100
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   libswresample   2.  0.101 /  2.  0.101
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   libpostproc    54.  0.100 / 54.  0.100
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX] Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test-video.mp4':
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   Metadata:
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     major_brand     : mp42
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     minor_version   : 0
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     compatible_brands: mp42mp41
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     creation_time   : 2015-07-14 22:13:20
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   Duration: 00:00:10.51, start: 0.000000, bitrate: 17178 kb/s
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 17170 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     Metadata:
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]       creation_time   : 2015-07-14 22:13:20
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]       handler_name    : Alias Data Handler
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]       encoder         : AVC Coding
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX] Codec AVOption b (set bitrate (in bits/s)) specified for output file #0 (test-video-480p.mp4) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX] Codec AVOption profile () specified for output file #0 (test-video-480p.mp4) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX] [libx264 @ 0x4518ea0] using SAR=1280/1281
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX] [libx264 @ 0x4518ea0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX] [libx264 @ 0x4518ea0] profile High, level 3.0
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX] [libx264 @ 0x4518ea0] 264 - core 120 r2151 a3f4407 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 ref=5 deblock=1:0:0 analyse=0x3:0x113 me=umh subme=8 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=6 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=23 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=crf mbtree=1 crf=24.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX] Output #0, mp4, to 'test-video-480p.mp4':
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   Metadata:
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     major_brand     : mp42
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     minor_version   : 0
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     compatible_brands: mp42mp41
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     encoder         : Lavf57.20.100
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 854x480 [SAR 1280:1281 DAR 16:9], q=-1--1, 23.98 fps, 24k tbn, 23.98 tbc (default)
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     Metadata:
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]       creation_time   : 2015-07-14 22:13:20
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]       handler_name    : Alias Data Handler
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]       encoder         : Lavc57.19.100 libx264
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]     Side data:
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]       unknown side data type 10 (24 bytes)
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX] Stream mapping:
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX]   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
[Tue Jan 19 17:10:59 2016] [error] [client XXX.XXX.XXX.XXX] Press [q] to stop, [?] for help
    
[Tue Jan 19 17:11:00 2016] [error] [client XXX.XXX.XXX.XXX] frame=   24 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    \r
    
[Tue Jan 19 17:11:00 2016] [error] [client XXX.XXX.XXX.XXX] frame=   53 fps= 51 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    \r
    
[Tue Jan 19 17:11:02 2016] [error] [client XXX.XXX.XXX.XXX] frame=   62 fps= 25 q=29.0 size=      75kB time=00:00:00.00 bitrate=N/A speed=   0x    \r
    
[Tue Jan 19 17:11:02 2016] [error] [client XXX.XXX.XXX.XXX] frame=   68 fps= 20 q=29.0 size=      90kB time=00:00:00.25 bitrate=2946.8kbits/s speed=0.0745x    \r
    
[Tue Jan 19 17:11:03 2016] [error] [client XXX.XXX.XXX.XXX] frame=   74 fps= 18 q=29.0 size=     103kB time=00:00:00.50 bitrate=1689.9kbits/s speed=0.12x    \r
    
[Tue Jan 19 17:11:04 2016] [error] [client XXX.XXX.XXX.XXX] frame=   80 fps= 16 q=29.0 size=     115kB time=00:00:00.75 bitrate=1258.5kbits/s speed=0.148x    \r
    
[Tue Jan 19 17:11:05 2016] [error] [client XXX.XXX.XXX.XXX] frame=   86 fps= 15 q=29.0 size=     128kB time=00:00:01.00 bitrate=1049.4kbits/s speed=0.175x    \r
    
[Tue Jan 19 17:11:05 2016] [error] [client XXX.XXX.XXX.XXX] frame=   92 fps= 15 q=29.0 size=     140kB time=00:00:01.25 bitrate= 917.2kbits/s speed=0.201x    \r
    
[Tue Jan 19 17:11:06 2016] [error] [client XXX.XXX.XXX.XXX] frame=   94 fps= 14 q=29.0 size=     146kB time=00:00:01.33 bitrate= 895.4kbits/s speed=0.196x    \r
    
[Tue Jan 19 17:11:07 2016] [error] [client XXX.XXX.XXX.XXX] frame=  100 fps= 13 q=29.0 size=     158kB time=00:00:01.58 bitrate= 816.6kbits/s speed=0.211x    \r

  • FFMPEG crop video output is black screen, sound is good [on hold]

    11 janvier 2016, par Oum Alaa

    I cropped a video using ffmpeg command line, the output is black screen, the sound is clear and good :

    ffmpeg -i Original.mp4 -t 00:00:29 -vf "crop=634:300:0:60" Done.mp4

    ffmpeg version :

    ffmpeg version 0.8.17-4:0.8.17-0ubuntu0.12.04.1, Copyright (c) 2000-2014 the Libav developers

    built on Mar 16 2015 13:26:50 with gcc 4.6.3

    video information :

    mediainfo '--Inform=Video;%Width%x%Height%' Original.mp4
    
634x360

    Thanks in advance

  • ffmpeg : corrupt audio in usage of avfoundation

    3 janvier 2016, par Andy

    I am trying to record my desktop screen (MacBook Pro (Retina, 15-inch, Mid 2014), OSX 10.10.5) with audio. First, I have to find the devices for recording, video:1 and audio:0 in my case.

    User@User-MacBook-Pro:~/test$ ffmpeg -hide_banner -f avfoundation -list_devices true -i ""
    
[AVFoundation input device @ 0x7ff19a422320] AVFoundation video devices:
    
[AVFoundation input device @ 0x7ff19a422320] [0] FaceTime HD Camera
    
[AVFoundation input device @ 0x7ff19a422320] [1] Capture screen 0
    
[AVFoundation input device @ 0x7ff4b9c22320] [2] Capture screen 1
    
[AVFoundation input device @ 0x7ff19a422320] AVFoundation audio devices:
    
[AVFoundation input device @ 0x7ff19a422320] [0] Soundflower (2ch)
    
[AVFoundation input device @ 0x7ff19a422320] [1] Built-in Microphone
    
[AVFoundation input device @ 0x7ff19a422320] [2] Soundflower (64ch)
    
: Input/output error

    Then I run to capture the screen :

    ffmpeg -f avfoundation -i "1:0" out_desktop.mkv

    and the audio of the output stutters terribly.
    But if I use the second external screen (which is connect via HDMI) :

    ffmpeg -f avfoundation -i "2:0" out_ext.mkv

    Then I have no audio problems.

    So, what could be the cause of this behaviour ? Somehow the video device "Capture screen 0" causes the audio stutter.

    Here are the full outputs of the two commands above, Screen 0 :

    User@User-MacBook-Pro:~/test$ ffmpeg -f avfoundation -i "1:0" out.mkv
    
ffmpeg version 2.8.4 Copyright (c) 2000-2015 the FFmpeg developers
    
  built with Apple LLVM version 7.0.2 (clang-700.1.81)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/1.5.2_1/include/openjpeg-1.5 --enable-nonfree --enable-vda
    
  libavutil      54. 31.100 / 54. 31.100
    
  libavcodec     56. 60.100 / 56. 60.100
    
  libavformat    56. 40.101 / 56. 40.101
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 40.101 /  5. 40.101
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  2.101 /  1.  2.101
    
  libpostproc    53.  3.100 / 53.  3.100
    
[avfoundation @ 0x7fca1200da00] Selected pixel format (yuv420p) is not supported by the input device.
    
[avfoundation @ 0x7fca1200da00] Supported pixel formats:
    
[avfoundation @ 0x7fca1200da00]   uyvy422
    
[avfoundation @ 0x7fca1200da00]   yuyv422
    
[avfoundation @ 0x7fca1200da00]   nv12
    
[avfoundation @ 0x7fca1200da00]   0rgb
    
[avfoundation @ 0x7fca1200da00]   bgr0
    
[avfoundation @ 0x7fca1200da00] Overriding selected pixel format to use uyvy422 instead.
    
[avfoundation @ 0x7fca1200da00] Stream #0: not enough frames to estimate rate; consider increasing probesize
    
Input #0, avfoundation, from '1:0':
    
  Duration: N/A, start: 11734.092500, bitrate: 2822 kb/s
    
    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 2880x1800, 1000k tbr, 1000k tbn, 1000k tbc
    
    Stream #0:1: Audio: pcm_f32le, 44100 Hz, stereo, flt, 2822 kb/s
    
File 'out.mkv' 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.
    
[libx264 @ 0x7fca1390e000] MB rate (20340000000) > level limit (2073600)
    
[libx264 @ 0x7fca1390e000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x7fca1390e000] profile High 4:2:2, level 5.2, 4:2:2 8-bit
    
[libx264 @ 0x7fca1390e000] 264 - core 148 r2601 a0cd7d3 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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 lookahead_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 keyint=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, matroska, to 'out.mkv':
    
  Metadata:
    
    encoder         : Lavf56.40.101
    
    Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv422p, 2880x1800, q=-1--1, 1000k fps, 1k tbn, 1000k tbc
    
    Metadata:
    
      encoder         : Lavc56.60.100 libx264
    
    Stream #0:1: Audio: vorbis (libvorbis) (oV[0][0] / 0x566F), 44100 Hz, stereo, fltp
    
    Metadata:
    
      encoder         : Lavc56.60.100 libvorbis
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:1 (pcm_f32le (native) -> vorbis (libvorbis))
    
Press [q] to stop, [?] for help
    
frame=  969 fps= 29 q=-1.0 Lsize=    6911kB time=00:00:34.80 bitrate=1626.8kbits/s    
    
video:6475kB audio:396kB subtitle:0kB other streams:0kB global headers:4kB muxing overhead: 0.591309%
    
[libx264 @ 0x7fca1390e000] frame I:4     Avg QP:15.77  size:1461092
    
[libx264 @ 0x7fca1390e000] frame P:246   Avg QP:16.00  size:  2608
    
[libx264 @ 0x7fca1390e000] frame B:719   Avg QP:13.91  size:   200
    
[libx264 @ 0x7fca1390e000] consecutive B-frames:  0.9%  0.4%  0.0% 98.7%
    
[libx264 @ 0x7fca1390e000] mb I  I16..4: 11.6% 43.3% 45.2%
    
[libx264 @ 0x7fca1390e000] mb P  I16..4:  0.0%  0.0%  0.1%  P16..4:  0.4%  0.0%  0.0%  0.0%  0.0%    skip:99.5%
    
[libx264 @ 0x7fca1390e000] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.2%  0.0%  0.0%  direct: 0.0%  skip:99.8%  L0:39.9% L1:60.0% BI: 0.1%
    
[libx264 @ 0x7fca1390e000] 8x8 transform intra:41.6% inter:38.8%
    
[libx264 @ 0x7fca1390e000] coded y,uvDC,uvAC intra: 76.9% 77.9% 75.5% inter: 0.0% 0.1% 0.0%
    
[libx264 @ 0x7fca1390e000] i16 v,h,dc,p: 51% 34% 11%  4%
    
[libx264 @ 0x7fca1390e000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 17% 19%  7%  4%  3%  8%  5% 16%
    
[libx264 @ 0x7fca1390e000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 24% 10%  7%  6%  5%  8%  7% 12%
    
[libx264 @ 0x7fca1390e000] i8c dc,h,v,p: 59% 14% 18%  9%
    
[libx264 @ 0x7fca1390e000] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0x7fca1390e000] ref P L0: 71.5%  3.4% 13.0% 12.1%
    
[libx264 @ 0x7fca1390e000] ref B L0: 46.6% 52.3%  1.1%
    
[libx264 @ 0x7fca1390e000] ref B L1: 95.1%  4.9%
    
[libx264 @ 0x7fca1390e000] kb/s:1525.48

    and Screen 1 :

    User@User-MacBook-Pro:~/test$ ffmpeg -f avfoundation -i "2:0" out.mkv
    
ffmpeg version 2.8.4 Copyright (c) 2000-2015 the FFmpeg developers
    
  built with Apple LLVM version 7.0.2 (clang-700.1.81)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/1.5.2_1/include/openjpeg-1.5 --enable-nonfree --enable-vda
    
  libavutil      54. 31.100 / 54. 31.100
    
  libavcodec     56. 60.100 / 56. 60.100
    
  libavformat    56. 40.101 / 56. 40.101
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 40.101 /  5. 40.101
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  2.101 /  1.  2.101
    
  libpostproc    53.  3.100 / 53.  3.100
    
[avfoundation @ 0x7fc2e900da00] Selected pixel format (yuv420p) is not supported by the input device.
    
[avfoundation @ 0x7fc2e900da00] Supported pixel formats:
    
[avfoundation @ 0x7fc2e900da00]   uyvy422
    
[avfoundation @ 0x7fc2e900da00]   yuyv422
    
[avfoundation @ 0x7fc2e900da00]   nv12
    
[avfoundation @ 0x7fc2e900da00]   0rgb
    
[avfoundation @ 0x7fc2e900da00]   bgr0
    
[avfoundation @ 0x7fc2e900da00] Overriding selected pixel format to use uyvy422 instead.
    
[avfoundation @ 0x7fc2e900da00] Stream #0: not enough frames to estimate rate; consider increasing probesize
    
Input #0, avfoundation, from '2:0':
    
  Duration: N/A, start: 11809.126333, bitrate: 2822 kb/s
    
    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 2560x1080, 1000k tbr, 1000k tbn, 1000k tbc
    
    Stream #0:1: Audio: pcm_f32le, 44100 Hz, stereo, flt, 2822 kb/s
    
File 'out.mkv' 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.
    
[libx264 @ 0x7fc2ea82ac00] MB rate (10880000000) > level limit (2073600)
    
[libx264 @ 0x7fc2ea82ac00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x7fc2ea82ac00] profile High 4:2:2, level 5.2, 4:2:2 8-bit
    
[libx264 @ 0x7fc2ea82ac00] 264 - core 148 r2601 a0cd7d3 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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 lookahead_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 keyint=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, matroska, to 'out.mkv':
    
  Metadata:
    
    encoder         : Lavf56.40.101
    
    Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv422p, 2560x1080, q=-1--1, 1000k fps, 1k tbn, 1000k tbc
    
    Metadata:
    
      encoder         : Lavc56.60.100 libx264
    
    Stream #0:1: Audio: vorbis (libvorbis) (oV[0][0] / 0x566F), 44100 Hz, stereo, fltp
    
    Metadata:
    
      encoder         : Lavc56.60.100 libvorbis
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:1 (pcm_f32le (native) -> vorbis (libvorbis))
    
Press [q] to stop, [?] for help
    
frame=  755 fps= 30 q=-1.0 Lsize=    1025kB time=00:00:26.65 bitrate= 315.1kbits/s    
    
video:680kB audio:326kB subtitle:0kB other streams:0kB global headers:4kB muxing overhead: 2.003084%
    
[libx264 @ 0x7fc2ea82ac00] frame I:4     Avg QP:13.22  size:145661
    
[libx264 @ 0x7fc2ea82ac00] frame P:191   Avg QP:19.87  size:   250
    
[libx264 @ 0x7fc2ea82ac00] frame B:560   Avg QP:28.31  size:   116
    
[libx264 @ 0x7fc2ea82ac00] consecutive B-frames:  1.1%  0.0%  0.4% 98.5%
    
[libx264 @ 0x7fc2ea82ac00] mb I  I16..4: 54.5% 29.2% 16.2%
    
[libx264 @ 0x7fc2ea82ac00] mb P  I16..4:  0.2%  0.1%  0.0%  P16..4:  0.1%  0.0%  0.0%  0.0%  0.0%    skip:99.6%
    
[libx264 @ 0x7fc2ea82ac00] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.3%  0.0%  0.0%  direct: 0.0%  skip:99.7%  L0:69.2% L1:30.8% BI: 0.0%
    
[libx264 @ 0x7fc2ea82ac00] 8x8 transform intra:31.7% inter:13.1%
    
[libx264 @ 0x7fc2ea82ac00] coded y,uvDC,uvAC intra: 10.9% 8.8% 8.5% inter: 0.0% 0.0% 0.0%
    
[libx264 @ 0x7fc2ea82ac00] i16 v,h,dc,p: 69% 31%  0%  0%
    
[libx264 @ 0x7fc2ea82ac00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27%  5% 67%  0%  0%  0%  0%  0%  0%
    
[libx264 @ 0x7fc2ea82ac00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 38% 25% 14%  3%  3%  4%  5%  4%  5%
    
[libx264 @ 0x7fc2ea82ac00] i8c dc,h,v,p: 92%  3%  4%  0%
    
[libx264 @ 0x7fc2ea82ac00] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0x7fc2ea82ac00] ref P L0: 76.3%  1.7% 16.8%  5.2%
    
[libx264 @ 0x7fc2ea82ac00] ref B L0: 38.9% 56.9%  4.2%
    
[libx264 @ 0x7fc2ea82ac00] ref B L1: 97.3%  2.7%
    
[libx264 @ 0x7fc2ea82ac00] kb/s:208.84

    EDIT

    The main differences between the two (lengthy) outputs above via

    wdiff -n output1 output2 |colordiff

    is the resolution ([-2880x1800,-] {+2560x1080,+}) and the resulting MB rate ([-(20340000000)-] {+(10880000000)+}). So, what could increase the performance of ffmpeg ?

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