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• ffmpeg fast accurate cut

  28 juillet 2019, par Ali Rasooli

  I want to cut a part of Video file without re-encoding whole video.
  This is the method came to my mind :

  

  first.mp4 :

  ffmpeg -i in.mp4 -ss start_cut -t start_to_a first.mp4

  last.mp4 :

  ffmpeg -i in.mp4 -ss b -t b_to_end last.mp4

  middle.mp4

  ffmpeg -i in.mp4 -ss a -t a_to_b -c copy middle.mp4

  then merge these three files with :

  merge -f concat -i fileslist -c copy out.mp4

  I tested this method but it’s not giving expected output the 3 video files are cut ok but after merging the middle part slows down and has low quality in out.mp4.

  What is the problem with this method ? Or is there another method to fast accurate cut ?

  Thank you.

• How can i cut a video from a specific timeline and save the cut area using ffmpeg ?

  17 novembre 2015, par Sharondohp Sharonas

  I have a Mov file i also have the file in Avi after converted it to Avi.
  What i want to do is to cut a part of the file from minute 1:10 until 1:50

  What i tried so far :

  using System;
  
  using System.Collections.Generic;
  
  using System.ComponentModel;
  
  using System.Data;
  
  using System.Drawing;
  
  using System.Linq;
  
  using System.Text;
  
  using System.Threading.Tasks;
  
  using System.Windows.Forms;
  
  using System.Diagnostics;
  
  
  
  namespace CutVideos
  
  {
  
      public partial class Form1 : Form
  
      {
  
          // 1:10 to 1:50
  
  
  
          public Form1()
  
          {
  
              InitializeComponent();
  
  
  
              Process.Start("ffmpeg.exe",
  
                "-sameq -t 10 -i E:\\New folder (29)\\MVI_7747.avi E:\\New folder (29)\\10seconds.avi");
  
          }
  
  
  
          private void Form1_Load(object sender, EventArgs e)
  
          {
  
  
  
          }
  
      }
  
  }

  First i tried to mov file then the avi in both cases it didn’t create the output file.
  For testing i did that it will cut only the first 10 seconds of the movie file. But it’s not working. Later i want to cut and save the part from minute 1:10 to 1:50

  I noticed that there is an error i think with the ffmpeg when running the program but i couldn’t see it since the console window is closing too fast.

• remove a subpart from the middle of a video

  22 mars 2020, par OneWorld

  I am trying to remove a middle part from a video from 2 to 3 seconds using FFMPEG. So that the video plays with the start, and the end but without the middle part between 2 to 3 seconds.

  This page helped a little bit
  https://superuser.com/questions/681885/how-can-i-remove-multiple-segments-from-a-video-using-ffmpeg

  My code is as follows :-

  ffmpeg -i input.mp4 -filter_complex "[0:v]trim=start=2:end=3,setpts=PTS-STARTPTS, concat[out1]" - map [out1] output_without_2_to_3_secs.mp4

  However with this code I get the following error message

  Cannot find a matching stream for unlabeled input pad 1 on filter Parsed_concat_2. I’m using a Mac.

  Any suggestions much appreciated