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• FFMpeg C# wrapper "MediaToolkit 1.0.4.11". How can I do a conversion in memory ?

  8 décembre 2016, par Quantum_Kernel

  I am currently using the MediaToolkit 1.0.4.11 C# wrapper for FFMPEG to extract wav audio from a range of video files.

  Instead of creating a wav file on disk, I would like to create it in memory (as a MemoryStream). This will save me from creating temp files which I need to delete and should speed up the various analyses that I am doing on the audio data.

  Because of the way the call to the library works, I’m not sure how to ’trick’ it into doing this. Is there a way to do it or will I have to obtain and edit the wrapper source code ?

  Here is what I have for doing the conversion on disk :

  var inputFile = new MediaToolkit.Model.MediaFile { Filename = mediaFilePath };
  
              var outputFile = new MediaToolkit.Model.MediaFile { Filename = @"C:\Temp\audio.wav" };
  
  
  
              var conversionOptions = new MediaToolkit.Options.ConversionOptions
  
              {
  
                  MaxVideoDuration = TimeSpan.FromSeconds(30),
  
                  VideoAspectRatio = MediaToolkit.Options.VideoAspectRatio.R16_9,
  
                  VideoSize = MediaToolkit.Options.VideoSize.Hd1080,
  
                  AudioSampleRate = MediaToolkit.Options.AudioSampleRate.Hz48000
  
              };
  
  
  
              using (var engine = new Engine())
  
              {
  
                  engine.Convert(inputFile, outputFile, conversionOptions);
  
              }

• Discord.js Music bot TypeError [ERR_INVALID_ARG_TYPE] : The "file" argument must be of type string. Received type object

  21 février 2020, par Cole Perry

  I’m new to Discord.js and I’m trying to have the bot join a voice channel and play an audio file on my computer. I have been following this guide : https://discord.js.org/#/docs/main/stable/topics/voice . Here is the Index.js page :

  const Discord = require('discord.js');
  
  const Colesbot = new Discord.Client();
  
  
  
  const token = '***********************************************';
  
  
  
  
  
  
  
  Colesbot.on('ready', () =>{
  
      console.log('Slamsbot is online.');
  
  })
  
  
  
  Colesbot.on('message', msg=>{
  
     if(msg.content == "What up bot?"){
  
         msg.reply("Whats good pimp?")
  
     }
  
  });
  
  
  
  Colesbot.on('message', message=>{
  
      if (message.content === '/join') {
  
          // Only try to join the sender's voice channel if they are in one themselves
  
          if (message.member.voiceChannel) {
  
              message.member.voiceChannel.join().then(connection => {
  
                  message.reply('I have successfully connected to the channel!');
  
  
  
                  // To play a file, we need to give an absolute path to it
  
                  const dispatcher = connection.playFile('C:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\Assets\Glory.mp3');
  
  
  
                  dispatcher.on('end', () => {
  
                      // The song has finished
  
                      console.log('Finished playing!');
  
                    });
  
  
  
                  dispatcher.on('error', e => {
  
                      // Catch any errors that may arise
  
                      console.log(e);
  
                    });
  
  
  
                    dispatcher.setVolume(0.5); // Set the volume to 50%
  
              }).catch(console.log);
  
      } else {
  
          message.reply('You need to join a voice channel first!');
  
        }
  
      }
  
   });
  
  
  
  
  
  
  
  //Event listener for new guild members
  
  Colesbot.on('guildMemberAdd', member =>{
  
      // Send the message to a designated channel on a server:
  
      const channel = member.guild.channels.find(ch => ch.name === 'general');
  
      // Do nothing if the channel wasn't found on this server
  
      if (!channel) return;
  
      // Send the message, mentioning the member
  
      channel.send(`Welcome to the server, ${member}. Please use the bot-commands channel to assign yourself a role.`);
  
  })
  
  
  
  Colesbot.login(token);
  
  
  
  
  
  
  
  exports.run = (client, message, args) => {
  
  
  
      let user = message.mentions.users.first || message.author;
  
  
  
  
  
  }

  FFMPEG is installed and I have set the environment path for it. When I type FFMPEG in the command line I get the proper response.

  Some have said I need to install the ffmpeg binaries but when I run npm install ffmpeg-binaries I get this error message :

  npm WARN deprecated ffmpeg-binaries@4.0.0: ffmpeg-binaries is no longer being maintained. use ffmpeg-static, or just install ffmpeg
  
  
  
  > lzma-native@3.0.8 install C:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\lzma-native
  
  > node-pre-gyp install --fallback-to-build && node node_modules/rimraf/bin.js build
  
  
  
  node-pre-gyp ERR! Tried to download(404): https://node-pre-gyp.addaleax.net/lzma-native/lzma_native-v3.0.8-node-v72-win32-x64.tar.gz
  
  node-pre-gyp ERR! Pre-built binaries not found for lzma-native@3.0.8 and node@12.14.1 (node-v72 ABI, unknown) (falling back to source compile with node-gyp)
  
  node-pre-gyp ERR! Tried to download(undefined): https://node-pre-gyp.addaleax.net/lzma-native/lzma_native-v3.0.8-node-v72-win32-x64.tar.gz
  
  node-pre-gyp ERR! Pre-built binaries not found for lzma-native@3.0.8 and node@12.14.1 (node-v72 ABI, unknown) (falling back to source compile with node-gyp)
  
  gyp ERR! find Python
  
  gyp ERR! find Python Python is not set from command line or npm configuration
  
  gyp ERR! find Python Python is not set from environment variable PYTHON
  
  gyp ERR! find Python checking if "python" can be used
  
  gyp ERR! find Python - "python" is not in PATH or produced an error
  
  gyp ERR! find Python checking if "python2" can be used
  
  gyp ERR! find Python - "python2" is not in PATH or produced an error
  
  gyp ERR! find Python checking if "python3" can be used
  
  gyp ERR! find Python - "python3" is not in PATH or produced an error
  
  gyp ERR! find Python checking if the py launcher can be used to find Python 2
  
  gyp ERR! find Python - "py.exe" is not in PATH or produced an error
  
  gyp ERR! find Python checking if Python is C:\Python27\python.exe
  
  gyp ERR! find Python - "C:\Python27\python.exe" could not be run
  
  gyp ERR! find Python checking if Python is C:\Python37\python.exe
  
  gyp ERR! find Python - "C:\Python37\python.exe" could not be run
  
  gypgyp ERR!  find PythonERR!
  
  find Pythongyp
  
   gyp ERR!ERR!  find Pythonfind Python Python is not set from command line or npm configuration
  
   **********************************************************
  
  gypgyp  ERR!ERR!  find Pythonfind Python Python is not set from environment variable PYTHON
  
   You need to install the latest version of Python.
  
  gypgyp  ERR!ERR!  find Pythonfind Python checking if "python" can be used
  
   Node-gyp should be able to find and use Python. If not,
  
  gypgyp  ERR!ERR!  find Pythonfind Python - "python" is not in PATH or produced an error
  
   you can try one of the following options:
  
  gypgyp  ERR!ERR!  find Pythonfind Python checking if "python2" can be used
  
   - Use the switch --python="C:\Path\To\python.exe"
  
  gypgyp ERR!  ERR!find Python  - "python2" is not in PATH or produced an error
  
  find Pythongyp   (accepted by both node-gyp and npm)
  
   gypERR!  ERR!find Python  checking if "python3" can be used
  
  find Pythongyp - Set the environment variable PYTHON
  
   gypERR!  ERR!find Python  - "python3" is not in PATH or produced an error
  
  find Pythongyp - Set the npm configuration variable python:
  
   gypERR!  ERR!find Python  checking if the py launcher can be used to find Python 2
  
  find Pythongyp   npm config set python "C:\Path\To\python.exe"
  
   gypERR!  ERR!find Python  - "py.exe" is not in PATH or produced an error
  
  find Pythongyp For more information consult the documentation at:
  
   gypERR!  ERR!find Python  checking if Python is C:\Python27\python.exe
  
  gypfind Python  https://github.com/nodejs/node-gyp#installation
  
  ERR!gyp  find PythonERR! - "C:\Python27\python.exe" could not be run
  
   gypfind Python  **********************************************************
  
  ERR!gyp  find PythonERR! checking if Python is C:\Python37\python.exe
  
   gypfind Python
  
  ERR! find Python - "C:\Python37\python.exe" could not be run
  
  gypgyp  ERR!ERR!  configure errorfind Python
  
  
  
  gypgyp  ERR!ERR!  stackfind Python Error: Could not find any Python installation to use
  
   **********************************************************
  
  gyp gypERR!  ERR!stack      at PythonFinder.fail (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-python.js:307:47)
  
  find Pythongyp  You need to install the latest version of Python.
  
  ERR!gyp stack      at PythonFinder.runChecks (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-python.js:136:21)
  
  ERR!gyp  ERR!find Python  Node-gyp should be able to find and use Python. If not,
  
  stack     at PythonFinder.<anonymous> (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-python.js:225:16)
  
  gypgyp  ERR!ERR!  find Pythonstack you can try one of the following options:
  
       at PythonFinder.execFileCallback (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-python.js:271:16)
  
  gypgyp  ERR!ERR!  stackfind Python     at exithandler (child_process.js:302:5)
  
  gyp - Use the switch --python="C:\Path\To\python.exe"
  
   gypERR!  stackERR!     at ChildProcess.errorhandler (child_process.js:314:5)
  
   gyp find PythonERR!    (accepted by both node-gyp and npm)
  
  stack     at ChildProcess.emit (events.js:223:5)
  
  gypgyp  ERR!ERR!  stackfind Python     at Process.ChildProcess._handle.onexit (internal/child_process.js:270:12)
  
   - Set the environment variable PYTHON
  
  gypgyp  ERR!ERR! stack      at onErrorNT (internal/child_process.js:456:16)
  
  find Pythongyp - Set the npm configuration variable python:
  
   gypERR!  ERR!stack      at processTicksAndRejections (internal/process/task_queues.js:81:21)
  
  find Python   npm config set python "C:\Path\To\python.exe"
  
  gypgyp  ERR!ERR!  find PythonSystem For more information consult the documentation at:
  
   Windows_NT 10.0.17763
  
  gypgyp  ERR!ERR!  find Pythoncommand https://github.com/nodejs/node-gyp#installation
  
   "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "configure" "--fallback-to-build" "--module=C:\\Users\\bobal\\Documents\\GitHub\\Spotify-Playlist-Discord-bot\\node_modules\\lzma-native\\binding-v3.0.8-node-v72-win32-x64\\lzma_native.node" "--module_name=lzma_native" "--module_path=C:\\Users\\bobal\\Documents\\GitHub\\Spotify-Playlist-Discord-bot\\node_modules\\lzma-native\\binding-v3.0.8-node-v72-win32-x64"
  
  gypgyp  ERR!ERR!  find Pythoncwd **********************************************************
  
   C:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\lzma-native
  
  gypgyp  ERR!ERR!  find Pythonnode -v
  
   v12.14.1
  
  gyp ERR! node-gyp -vgyp v5.0.5
  
   gyp ERR!ERR!  configure errornot ok
  
  
  
  gyp ERR! stack Error: Could not find any Python installation to use
  
  gyp ERR! stack     at PythonFinder.fail (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-python.js:307:47)
  
  gyp ERR! stack     at PythonFinder.runChecks (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-python.js:136:21)
  
  gyp ERR! stack     at PythonFinder.<anonymous> (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-python.js:225:16)
  
  gyp ERR! stack     at PythonFinder.execFileCallback (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-python.js:271:16)
  
  gyp ERR! stack     at exithandler (child_process.js:302:5)
  
  gyp ERR! stacknode-pre-gyp     at ChildProcess.errorhandler (child_process.js:314:5)
  
   gypERR!  ERR!build error
  
  stack     at ChildProcess.emit (events.js:223:5)
  
  node-pre-gypgyp  ERR!ERR!  stackstack     at Process.ChildProcess._handle.onexit (internal/child_process.js:270:12)
  
   Error: Failed to execute 'C:\Program Files\nodejs\node.exe C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js configure --fallback-to-build --module=C:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\lzma-native\binding-v3.0.8-node-v72-win32-x64\lzma_native.node --module_name=lzma_native --module_path=C:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\lzma-native\binding-v3.0.8-node-v72-win32-x64' (1)
  
  node-pre-gypgyp  ERR! ERR!stack      at ChildProcess.<anonymous> (C:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\lzma-native\node_modules\node-pre-gyp\lib\util\compile.js:83:29)
  
  stacknode-pre-gyp     at onErrorNT (internal/child_process.js:456:16)
  
   gypERR!  ERR!stack      at ChildProcess.emit (events.js:223:5)
  
  stacknode-pre-gyp     at processTicksAndRejections (internal/process/task_queues.js:81:21)
  
   ERR! stackgyp     at maybeClose (internal/child_process.js:1021:16)
  
   node-pre-gypERR!  ERR!System stack Windows_NT 10.0.17763
  
       at Process.ChildProcess._handle.onexit (internal/child_process.js:283:5)
  
  gyp ERR! node-pre-gypcommand  "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "configure" "--fallback-to-build" "--module=C:\\Users\\bobal\\Documents\\GitHub\\Spotify-Playlist-Discord-bot\\node_modules\\lzma-native\\binding-v3.0.8-node-v72-win32-x64\\lzma_native.node" "--module_name=lzma_native" "--module_path=C:\\Users\\bobal\\Documents\\GitHub\\Spotify-Playlist-Discord-bot\\node_modules\\lzma-native\\binding-v3.0.8-node-v72-win32-x64"
  
  ERR!gyp  SystemERR! Windows_NT 10.0.17763
  
   node-pre-gypcwd  C:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\lzma-native
  
  ERR!gyp  commandERR! "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\bobal\\Documents\\GitHub\\Spotify-Playlist-Discord-bot\\node_modules\\lzma-native\\node_modules\\node-pre-gyp\\bin\\node-pre-gyp" "install" "--fallback-to-build"
  
   node-pre-gypnode -v  v12.14.1
  
  ERR!gyp  cwdERR! C:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\lzma-native
  
   node-pre-gypnode-gyp -v  v5.0.5
  
  ERR!gyp  ERR!node -v  v12.14.1
  
  not ok
  
  node-pre-gyp ERR! node-pre-gyp -v v0.6.39
  
  node-pre-gyp ERR! not ok
  
  Failed to execute 'C:\Program Files\nodejs\node.exe C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js configure --fallback-to-build --module=C:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\lzma-native\binding-v3.0.8-node-v72-win32-x64\lzma_native.node --module_name=lzma_native --module_path=C:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\lzma-native\binding-v3.0.8-node-v72-win32-x64' (1)
  
  npm WARN discord.js@11.5.1 requires a peer of @discordjs/uws@^10.149.0 but none is installed. You must install peer dependencies yourself.
  
  npm WARN spotifybot@1.0.0 No description
  
  npm WARN spotifybot@1.0.0 No repository field.
  
  
  
  npm ERR! code ELIFECYCLE
  
  npm ERR! errno 1
  
  npm ERR! lzma-native@3.0.8 install: `node-pre-gyp install --fallback-to-build &amp;&amp; node node_modules/rimraf/bin.js build`
  
  npm ERR! Exit status 1
  
  npm ERR!
  
  npm ERR! Failed at the lzma-native@3.0.8 install script.
  
  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
  
  
  
  npm ERR! A complete log of this run can be found in:
  
  npm ERR!     C:\Users\bobal\AppData\Roaming\npm-cache\_logs\2020-02-21T19_25_47_323Z-debug.log
  
  </anonymous></anonymous></anonymous>

  So then I tried installing an older version and I’m now using ffmpeg-binaries@3.2.2-3 but when I type /join I get this : [ERR_INVALID_ARG_TYPE] : The "file" argument must be of type string. Received type object

• FFmpeg disrupting "while/if" structure in Bash/shell scripting - how to fix ?

  25 avril 2020, par charles_river_runs

  I'm trying to extract a set number of frames from a series of .mp4 videos within several folders. I'm reading in variables from a CSV file, where each row of the CSV file contains the variables for each clip, which are : "dataset", "file name", "framelabel", "clip target start time", "clip target end time", "extract rate" (in seconds per frame), and "reason for exclusion."

  



  I'm using a while/if loop structure so I can avoid trying to process the videos that are excluded from our project.

  



  The while/if loop structure seems to work well when I just print out the variable names. However, when I insert a line of ffmpeg code, the variable assignments for the next video (ie, the following line read from the CSV file) go haywire.

  



  Here is the code WITHOUT the ffmpeg line, which seems to work (all the "echo" statements are just there as debugging aids to track the variable assignments) :

  



  IFS=‘,’
while read DATASET FILENAME FRAMELABEL TARGET_START TARGET_END TOTAL_DURATION EXTRACT_RATE REASON_FOR_EXCLUSION 
do  
echo “PRE FFMPEG”
echo “dataset and filename are “ $DATASET/$FILENAME
echo “target start is “ $TARGET_START
echo “target end is “ $TARGET_END

if [ $TARGET_START != EXCLUDED ] && [ $TARGET_START != Target_start ]
then
IFS=‘:’ 
read -r -a fps_array <<< "$EXTRACT_RATE"
IFS=‘,’
let "secs = ${fps_array[0]}*3600 + ${fps_array[1]}*60 + ${fps_array[2]}"
FPS_RATE=$(echo "scale=20;1/$secs" | bc)

echo “AFTER FFMPEG”
echo “dataset and filename are “ $DATASET/$FILENAME
echo “target start is “ $TARGET_START
echo “target end is “ $TARGET_END

fi
done < Test_Key.csv`



  



  The output for the code above looks like this, which is correct (I have 2 folders, "cats" and "es123", with two videos each ; one of the es123 videos is excluded from frame extraction) :

  



  “PRE FFMPEG”
“dataset and filename are “ cats/IMG_3460
“target start is “ 0:00:02
“target end is “ 0:00:24
“AFTER FFMPEG”
“dataset and filename are “ cats/IMG_3460
“target start is “ 0:00:02
“target end is “ 0:00:24
“PRE FFMPEG”
“dataset and filename are “ cats/IMG_4137
“target start is “ 0:00:10
“target end is “ 0:00:40
“AFTER FFMPEG”
“dataset and filename are “ cats/IMG_4137
“target start is “ 0:00:10
“target end is “ 0:00:40
“PRE FFMPEG”
“dataset and filename are “ es123/IMG_4577
“target start is “ EXCLUDED
“target end is “
“PRE FFMPEG”
“dataset and filename are “ es123/IMG_4839
“target start is “ 0:00:05
“target end is “ 0:00:25
“AFTER FFMPEG”
“dataset and filename are “ es123/IMG_4839
“target start is “ 0:00:05
“target end is “ 0:00:25


  



  However, I then try to add my ffmpeg line in that does the actual frame extraction :

  



  IFS=‘,’
while read DATASET FILENAME FRAMELABEL TARGET_START TARGET_END TOTAL_DURATION EXTRACT_RATE REASON_FOR_EXCLUSION 
do  
echo “PRE FFMPEG”
echo “dataset and filename are “ $DATASET/$FILENAME
echo “target start is “ $TARGET_START
echo “target end is “ $TARGET_END

if [ $TARGET_START != EXCLUDED ] && [ $TARGET_START != Target_start ]
then
IFS=‘:’ 
read -r -a fps_array <<< "$EXTRACT_RATE"
IFS=‘,’
let "secs = ${fps_array[0]}*3600 + ${fps_array[1]}*60 + ${fps_array[2]}"
FPS_RATE=$(echo "scale=20;1/$secs" | bc)

ffmpeg -i $DATASET/$FILENAME.mp4 -ss $TARGET_START -to $TARGET_END -vf fps=$FPS_RATE ${DATASET}/${DATASET}_${FILENAME}_%03d.jpg

echo “AFTER FFMPEG”
echo “dataset and filename are “ $DATASET/$FILENAME
echo “target start is “ $TARGET_START
echo “target end is “ $TARGET_END

fi
done < Test_Key.csv


  



  The result is that frames are correctly extracted for the first movie, but then the variable names for the second movie are completely screwed up (and then, of course, the code fails because the video names are wrong). You can see this in the 'echo' statements I used to track the variable naming, which become :

  



  “PRE FFMPEG”
“dataset and filename are “ cats/IMG_3460
“target start is “ 0:00:02
“target end is “ 0:00:24
“AFTER FFMPEG”
“dataset and filename are “ cats/IMG_3460
“target start is “ 0:00:02
“target end is “ 0:00:24
“PRE FFMPEG”
“dataset and filename are “ IMG_4839/es123_2
“target start is “ 0:00:25
“target end is “ 0:00:20


  



  Does anyone know why ffmpeg is affecting the functioning of the while/if loop structure here ? (I'm pretty new to shell scripting, sorry if this is something obvious). And what I can do to fix it ?

  



  Thank you !

  



  For reference, here is everything printed when I run the code with the ffmpeg line included— there are some parse errors showing up that I don't really understand but probably explain this.

  



  “PRE FFMPEG”&#xA;“dataset and filename are “ cats/IMG_3460&#xA;“target start is “ 0:00:02&#xA;“target end is “ 0:00:24&#xA;ffmpeg version 4.2.2-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers&#xA;  built with Apple clang version 11.0.0 (clang-1100.0.33.16)&#xA;  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay&#xA;  libavutil      56. 31.100 / 56. 31.100&#xA;  libavcodec     58. 54.100 / 58. 54.100&#xA;  libavformat    58. 29.100 / 58. 29.100&#xA;  libavdevice    58.  8.100 / 58.  8.100&#xA;  libavfilter     7. 57.100 /  7. 57.100&#xA;  libswscale      5.  5.100 /  5.  5.100&#xA;  libswresample   3.  5.100 /  3.  5.100&#xA;  libpostproc    55.  5.100 / 55.  5.100&#xA;Input #0, mov,mp4,m4a,3gp,3g2,mj2, from &#x27;cats/IMG_3460.mp4&#x27;:&#xA;  Metadata:&#xA;    major_brand     : isom&#xA;    minor_version   : 512&#xA;    compatible_brands: isomiso2avc1mp41&#xA;    encoder         : Lavf58.29.100&#xA;  Duration: 00:00:25.15, start: 0.000000, bitrate: 6866 kb/s&#xA;    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1080x1920, 6796 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)&#xA;    Metadata:&#xA;      handler_name    : Core Media Video&#xA;    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 69 kb/s (default)&#xA;    Metadata:&#xA;      handler_name    : Core Media Audio&#xA;Stream mapping:&#xA;  Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native))&#xA;Press [q] to stop, [?] for help&#xA;&#xA;Enter command: <target>|all <time>|-1 <command>[ <argument>]&#xA;&#xA;Parse error, at least 3 arguments were expected, only 1 given in string &#x27;ats,IMG_4137,cats_2,0:00:10,0:00:40,0:00:30,0:00:03,none,,&#x27;&#xA;[swscaler @ 0x7fd3fc953400] deprecated pixel format used, make sure you did set range correctly&#xA;Output #0, image2, to &#x27;cats/cats_IMG_3460_%03d.jpg&#x27;:&#xA;  Metadata:&#xA;    major_brand     : isom&#xA;    minor_version   : 512&#xA;    compatible_brands: isomiso2avc1mp41&#xA;    encoder         : Lavf58.29.100&#xA;    Stream #0:0(und): Video: mjpeg, yuvj420p(pc), 1080x1920, q=2-31, 200 kb/s, 0.50 fps, 0.50 tbn, 0.50 tbc (default)&#xA;    Metadata:&#xA;      handler_name    : Core Media Video&#xA;      encoder         : Lavc58.54.100 mjpeg&#xA;    Side data:&#xA;      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1&#xA;frame=    8 fps=3.2 q=1.6 size=N/A time=00:00:16.00 bitrate=N/A speed=6.33x    0.00 bitrate=N/A speed=6.59x    &#xA;Enter command: <target>|all <time>|-1 <command>[ <argument>]&#xA;&#xA;Parse error, at least 3 arguments were expected, only 1 given in string &#x27;LUDED,,,,boring,,&#x27;&#xA;frame=   11 fps=3.0 q=2.6 L00120000000000000000000000000000size=N/A time=00:00:22.00 bitrate=N/A speed=6.06x    &#xA;video:803kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown&#xA;“AFTER FFMPEG”&#xA;“dataset and filename are “ cats/IMG_3460&#xA;“target start is “ 0:00:02&#xA;“target end is “ 0:00:24&#xA;“PRE FFMPEG”&#xA;“dataset and filename are “ IMG_4839/es123_2&#xA;“target start is “ 0:00:25&#xA;“target end is “ 0:00:20&#xA;-bash: let: secs = none*3600 &#x2B; *60 &#x2B; : syntax error: operand expected (error token is "*60 &#x2B; ")&#xA;ffmpeg version 4.2.2-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers&#xA;  built with Apple clang version 11.0.0 (clang-1100.0.33.16)&#xA;  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay&#xA;  libavutil      56. 31.100 / 56. 31.100&#xA;  libavcodec     58. 54.100 / 58. 54.100&#xA;  libavformat    58. 29.100 / 58. 29.100&#xA;  libavdevice    58.  8.100 / 58.  8.100&#xA;  libavfilter     7. 57.100 /  7. 57.100&#xA;  libswscale      5.  5.100 /  5.  5.100&#xA;  libswresample   3.  5.100 /  3.  5.100&#xA;  libpostproc    55.  5.100 / 55.  5.100&#xA;IMG_4839/es123_2.mp4: No such file or directory&#xA;“AFTER FFMPEG”&#xA;“dataset and filename are “ IMG_4839/es123_2&#xA;“target start is “ 0:00:25&#xA;“target end is “ 0:00:20&#xA;</argument></command></time></target></argument></command></time></target>