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• How to make use of "&" command in TCL version 8.0 to make a proc or exec command run in background i.e in parallel on windows 7 ?

  21 novembre 2017, par M. D. P

  I am working on a project where I am using FFMPEG to capture video. The FFMPEG command is :

  ffmpeg -f dshow  -t 00:00:10 -i "video=Integrated Webcam" -b 5000k -s 1280x720 c:/test/sample.avi

  The link : https://www.tcl.tk/man/tcl8.5/tutorial/Tcl26.html make the use of the command :

  exec myprog &

  Here they have not specified what is myprog.

  The link : Running shell commands in background, in a tcl proc make the use of command :

   eval exec [linsert $args 0 exec] >> $tempFile &

  Here the command is not accepted as eval and exec is one after another, so it takes exec as a variable.

  Help me, with the write right command which can be used to capture my video in the background with TCL version 8.0 and Windows 7.

• How to install FFmpeg on a Linux server using SSH [closed]

  29 janvier 2013, par user2019961

  I've been trying my hardest and I can't seem to find a straight answer ; I have the latest version of FFmpeg downloaded and uploaded to my server, SSH enabled and I can get into the shell command prompt but I can't figure out how to actually install it. IT says just to type ./configure but that does nothing. Can anyone help me to install it ?

• Conditionally rotate portrait video if landscape with FFmeg

  12 novembre 2019, par Jules

  I need to convert only portrait videos to landscape, some video maybe landscape already.

  I need to achieve this with a shell script on a mac.

  I’ve previously managed to rotate a video with ..

  ffmpeg -i "/Users/jm/Library/Mobile Documents/com~apple~QuickTimePlayerX/Documents/output.mp4" 
  
  -strict 1 -metadata:s:v rotate="90" -codec copy "$3"

  $3 is the input file in my shell script

  I’ve found this ...

  ffmpeg -i input.m4v 2>&1 | grep rotate

  From this answer https://stackoverflow.com/a/31683689/450456

  I’m not sure how to combine the two, or have to get and use the height and width in an if statement in a shell script.

  EDIT : Info as requested

  ffmpeg -i final.mp4
  
  ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.1_2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --disable-jack --enable-gpl --enable-libass --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --enable-openssl --disable-lzma --enable-nonfree
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'final.mp4':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      creation_time   : 2019-11-12T20:45:27.000000Z
  
    Duration: 00:00:24.36, start: 0.031667, bitrate: 365 kb/s
  
      Stream #0:0(und): Video: hevc (Main 10) (hvc1 / 0x31637668), yuv420p10le(tv, smpte170m/unknown/unknown), 1242x2688, 365 kb/s, 1.73 fps, 600 tbr, 600 tbn, 600 tbc (default)
  
      Metadata:
  
        creation_time   : 2019-11-12T20:45:27.000000Z
  
        handler_name    : Core Media Data Handler
  
        encoder         : HEVC
  
  At least one output file must be specified