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• how to remove multiple parts from a video, using ffmpeg ?

  26 septembre 2023, par jojo

  how to remove multiple parts from a video ?
for example i have a video of one minute and i want to delete following segments :

  


  from second 0.0 to second 10.0
from second 20.0 to second 30.0
from second 40.0 to second 45.0

  


  please remember i want to delete above mentioned segments, the output should not include these segments.
i have already tried all the answers, but they are all joining the trimmed segments, which i don't want.e.g :

  


  ffmpeg -i foo.mp4 -filter_complex "[0:v]trim=duration=30[av];[0:a]atrim=duration=30[aa];[0:v]trim=start=40:end=50,setpts=PTS-STARTPTS[bv];[0:a]atrim=start=40:end=50,asetpts=PTS-STARTPTS[ba];[0:v]trim=start=80,setpts=PTS-STARTPTS[cv];[0:a]atrim=start=80,asetpts=PTS-STARTPTS[ca];[av][aa][bv][ba][cv][ca]concat=n=3:v=1:a=1" out.mp4


  


  thank you.
note :(python version also accepted.)

  


• How to crop and scale multiple landscape regions into a new portrait video ? FFmpeg

  27 août 2023, par 3V1LXD

  I have an electron program that selects multiple regions of a landscape video and lets you rearrange them in a portrait canvas. I'm having trouble building the proper ffmpeg command to create the video. I have this somewhat working. I can export 2 layers, but i can't export if i only have 1 layer or if i have 3 or more layers selected.

  


  2 regions of video selected

  


  layers [
  { top: 0, left: 658, width: 576, height: 1080 },
  { top: 262, left: 0, width: 576, height: 324 }
]
newPositions [
  { top: 0, left: 0, width: 576, height: 1080 },
  { top: 0, left: 0, width: 576, height: 324 }
]
filtergraph [0]crop=576:1080:658:0,scale=576:1080[v0];[0]crop=576:324:0:262,scale=576:324[v1];[v0][v1]overlay=0:0:0:0[out]

No Error export successful


  


  1 region selected

  


  layers [ { top: 0, left: 650, width: 576, height: 1080 } ]
newPositions [ { top: 0, left: 0, width: 576, height: 1080 } ]
filtergraph [0]crop=576:1080:650:0,scale=576:1080[v0];[v0]overlay=0:0[out]

FFmpeg error: [fc#0 @ 000001dd3b6db0c0] Cannot find a matching stream for unlabeled input pad overlay
Error initializing complex filters: Invalid argument


  


  3 regions of video selected

  


  layers [
  { top: 0, left: 641, width: 576, height: 1080 },
  { top: 250, left: 0, width: 576, height: 324 },
  { top: 756, left: 0, width: 576, height: 324 }
]
newPositions [
  { top: 0, left: 0, width: 576, height: 1080 },
  { top: 0, left: 0, width: 576, height: 324 },
  { top: 756, left: 0, width: 576, height: 324 }
]
filtergraph [0]crop=576:1080:641:0,scale=576:1080[v0];[0]crop=576:324:0:250,scale=576:324[v1];[0]crop=576:324:0:756,scale=576:324[v2];[v0][v1][v2]overlay=0:0:0:0:0:756[out]

FFmpeg error: [AVFilterGraph @ 0000018faf2189c0] More input link labels specified for filter 'overlay' than it has inputs: 3 > 2
[AVFilterGraph @ 0000018faf2189c0] Error linking filters

FFmpeg error: Failed to set value '[0]crop=576:1080:698:0,scale=576:1080[v0];[0]crop=576:324:0:264,scale=576:324[v1];[0]crop=576:324:0:756,scale=576:324[v2];[v0][v1][v2]overlay=0:0:0:0:0:0[out]' for option 'filter_complex': Invalid argument
Error parsing global options: Invalid argument


  


  I can't figure out how to construct the proper overlay command. Here is the js code i'm using from my electron app.

  


  ipcMain.handle('export-video', async (_event, args) => {
  const { videoFile, outputName, layers, newPositions } = args;
  const ffmpegPath = path.join(__dirname, 'bin', 'ffmpeg');
  const outputDir = checkOutputDir();
  
  // use same video for each layer as input
  // crop, scale, and position each layer
  // overlay each layer on top of each other

  // export video
  console.log('layers', layers);
  console.log('newPositions', newPositions);

  let filtergraph = '';

  for (let i = 0; i < layers.length; i++) {
    const { top, left, width, height } = layers[i];
    const { width: newWidth, height: newHeight } = newPositions[i];
    const filter = `[0]crop=${width}:${height}:${left}:${top},scale=${newWidth}:${newHeight}[v${i}];`;
    filtergraph += filter;
  }

  for (let i = 0; i < layers.length; i++) {
    const filter = `[v${i}]`;
    filtergraph += filter;
  }

  filtergraph += `overlay=`;
  for (let i = 0; i < layers.length; i++) {
    const { top: newTop, left: newLeft } = newPositions[i];
    const overlay = `${newLeft}:${newTop}:`;
    filtergraph += overlay;
  }

  filtergraph = filtergraph.slice(0, -1); // remove last comma
  filtergraph += `[out]`;
  
  console.log('filtergraph', filtergraph);

  const ffmpeg = spawn(ffmpegPath, [
    '-i', videoFile,
    '-filter_complex', filtergraph,
    '-map', '[out]',
    '-c:v', 'libx264',
    '-preset', 'ultrafast',
    '-crf', '18',
    '-y',
    path.join(outputDir, `${outputName}`)
  ]);  

  ffmpeg.stdout.on('data', (data) => {
    console.log(`FFmpeg output: ${data}`);
  });

  ffmpeg.stderr.on('data', (data) => {
    console.error(`FFmpeg error: ${data}`);
  });

  ffmpeg.on('close', (code) => {
    console.log(`FFmpeg process exited with code ${code}`);
    // event.reply('ffmpeg-export-done'); // Notify the renderer process
  });
});


  


  Any advice might be helpful, The docs are confusing, Thanks.

  


• FFMPEG - Multiple filters at same time (add background, draw text, add overlay) [closed]

  11 août 2023, par Jason z
  

  1. I am adding a bitmap in start of a video, remains there for 2 seconds, then actual video starts, using following command

  


  


  


  ffmpeg -i SRC.mp4 -framerate 25 -loop 1 -t 2 -i first-bg.png -f lavfi -t 2 -i anullsrc -filter_complex "[0:v]trim=0:2,drawbox=t=fill[base] ;[1][base]scale2ref=iw:ih:force_original_aspect_ratio=decrease:flags=spline[2nd][base2] ;[base2][2nd]overlay='(W-w)/2' :'(H-h)/2'[padded] ;[padded][2:a][0:v][0:a]concat=n=2:v=1:a=1[v][a]" -c:v libx264 -c:a aac -map "[v]" -map "[a]" -to 0:05 -y z_with_intro.mp4

  


  


  

  2. Then am drawing text on video for first 2 seconds using this :

  


  


  


  ffmpeg -i z_with_intro.mp4 -filter_complex "drawtext=text='Structures in C Language':line_spacing=30:x=100:y=100:fontcolor=#FFFFFF:fontsize=96:fontfile=arial.TTF:enable='between(t,0,2)'" -to 0:05 -c:v libx264 -c:a aac -y z_with_text.mp4

  


  


  Problem :
I tried combining both of commands by repeating -filter_complex in command, it didn't work, neither when I used comma and append draw text like this :
....:a=1[v][a],drawtext=text.....

  


  Additionally : I also want to add audio from e.g. SRC.m4a for 2 seconds in the beginning of target file where I added intro in first command, how will I do that too, all in single command.

  


  thanks