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• FFprobe (part of FFmpeg) command output to variable in a Windows Batch File [duplicate]

  12 décembre 2017, par Bazza DownUnder

  This question already has an answer here :

  • batch store ffprobe as variable
    
    1 answer
    

  I want to capture the Audio codec in a variable when I execute an FFprobe command within a batch file.

  The FFprobe command when executed on its own :

  ffprobe "myvideo.mkv" -v error -select_streams a:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1

  Results in :

  aac

  I want to check if the audio codec of the video is aac. If so then no need to convert the videos audio.

  This is the bat file :

  @echo off
  
  
  
  for %%f in (*.%1) do (
  
  
  
      (Echo "%%f" | FIND /I ".srt" 1>NUL) || (
  
  
  
  
  
          For /F %%I in ('ffprobe "%%~nf.%1" -v error -select_streams a:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1') Do Set StrCodecs=%%I
  
  
  
          echo Audio Codecs = %StrCodecs%
  
  
  
          echo Creating "New\%%~nf.%1"
  
          ffmpeg -i "%%~nf.%1" -loglevel panic -movflags +faststart -c:v copy -c:a aac -b:a 384k "New\%%~nf.%1"
  
          echo Done with "New\%%~nf.%1"
  
      )
  
  )

  The error I get with above is :

  Argument ’codec_name’ provided as input filename, but ’myvideo.mkv’
  was already specified.

  Even if I remove the single quotes, those in the brackets just after in, and have it look like this :

  For /F %%I in (ffprobe "%%~nf.%1" -v error -select_streams a:0 
  
  -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1) 
  
  Do Set StrCodecs=%%I

  The result is :

  The system cannot find the file ffprobe.

  Audio Codecs = Creating

  "New\myvideo.mkv"

  Everything else works in the bat file.

• Revision e8923fe492 : Changes to auto partition size selection. Changes to code to auto select a part

  16 août 2013, par Paul Wilkins

  Changed Paths :
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
  
  Changes to auto partition size selection.

  Changes to code to auto select a partition size range
  based on data from spatial neighbors.

  Now looks at the sb_type in each 8x8 block of above
  and left SB64.

  The effect on speed 1 is now weaker giving better
  quality but less speed gain. Now also used in speed 2.

  Change-Id : Iace33a97d5c3498dd2a9a8a4067351941abcbabc

• Ffmpeg rounds seconds instead of using the milliseconds part

  10 mai 2021, par NourElDineA

  I tried to cut a video using the following command :

  


  ffmpeg -i input.mp4 -ss 00:00:00 -to 00:00:06.600 output.mp4


  


  When I run the command ffmpeg rounds up and the output video is 7 seconds instead of 6.6 seconds.
I would like to know if there is a way to cut the video precisely where I tell it to.

  


  Here is the log file content :

  


  ffmpeg version 4.3.1-2021-01-01-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10.2.0 (Rev5, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  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
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out2.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
  Duration: 00:00:10.52, start: 0.000000, bitrate: 1070 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 960x720 [SAR 1:1 DAR 4:3], 935 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
    Metadata:
      handler_name    : Telestream Inc. Dib Library - ReleaseVantage 2014.59.138974
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 126 kb/s (default)
    Metadata:
      handler_name    : Telestream Inc. Dib Library - ReleaseVantage 2014.59.138974
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0000015de0911400] using SAR=1/1
[libx264 @ 0000015de0911400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0000015de0911400] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0000015de0911400] 264 - core 161 r3027 4121277 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - 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, mp4, to 'out3.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
    Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 960x720 [SAR 1:1 DAR 4:3], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
    Metadata:
      handler_name    : Telestream Inc. Dib Library - ReleaseVantage 2014.59.138974
      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(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : Telestream Inc. Dib Library - ReleaseVantage 2014.59.138974
      encoder         : Lavc58.91.100 aac
frame=  100 fps=0.0 q=29.0 size=       0kB time=00:00:03.56 bitrate=   0.1kbits/s speed=6.78x    
frame=  172 fps=167 q=29.0 size=     256kB time=00:00:05.95 bitrate= 352.4kbits/s speed=5.77x    
frame=  198 fps=126 q=-1.0 Lsize=     818kB time=00:00:06.61 bitrate=1013.6kbits/s speed=4.22x    
video:709kB audio:100kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.054347%
[libx264 @ 0000015de0911400] frame I:1     Avg QP: 3.25  size:   178
[libx264 @ 0000015de0911400] frame P:84    Avg QP:18.55  size:  6826
[libx264 @ 0000015de0911400] frame B:113   Avg QP:20.94  size:  1347
[libx264 @ 0000015de0911400] consecutive B-frames:  1.5% 66.7%  1.5% 30.3%
[libx264 @ 0000015de0911400] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0000015de0911400] mb P  I16..4:  5.8%  6.9%  0.6%  P16..4: 40.1%  4.8%  3.4%  0.0%  0.0%    skip:38.4%
[libx264 @ 0000015de0911400] mb B  I16..4:  0.1%  0.3%  0.0%  B16..8: 12.1%  0.8%  0.1%  direct: 6.5%  skip:80.1%  L0:33.9% L1:60.4% BI: 5.7%
[libx264 @ 0000015de0911400] 8x8 transform intra:48.3% inter:70.6%
[libx264 @ 0000015de0911400] coded y,uvDC,uvAC intra: 13.6% 73.4% 33.1% inter: 4.1% 20.1% 0.5%
[libx264 @ 0000015de0911400] i16 v,h,dc,p: 92%  4%  3%  2%
[libx264 @ 0000015de0911400] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13%  7% 65%  2%  3%  3%  3%  3%  2%
[libx264 @ 0000015de0911400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 16% 22%  5%  7%  7%  7%  6%  3%
[libx264 @ 0000015de0911400] i8c dc,h,v,p: 54% 20% 23%  4%
[libx264 @ 0000015de0911400] Weighted P-Frames: Y:6.0% UV:6.0%
[libx264 @ 0000015de0911400] ref P L0: 69.2%  5.3% 17.7%  7.7%  0.1%
[libx264 @ 0000015de0911400] ref B L0: 92.8%  6.2%  1.0%
[libx264 @ 0000015de0911400] ref B L1: 99.5%  0.5%
[libx264 @ 0000015de0911400] kb/s:878.78
[aac @ 0000015de0914080] Qavg: 6573.620


  


  The output file is 7 seconds long which means ffmpeg rounded up my 6.60 to 7 and I need it to cut exactly at 00:00:06.60