Recherche avancée

Sur d’autres sites (6266)

• Concat three videos with one audio

  27 septembre 2018, par Михаил Безуглый

  Thank you for coming here. I have three video clips (the first is 3 seconds, the second is 20 seconds, the third is 2 seconds), I connect them using the following command :

  ffmpeg -i opening.mp4 -i middle.mp4 -i ending.mp4 -filter_complex "[0:v] [1:v] [2:v] concat=n=3:v=1 [v]" -map "[v]" output.mp4

  Since all three videos do not have audio tracks, I do not need to include [a]. And then the day came when I needed it. I have an audio track, duration of 35 seconds(which is much larger than the output.mp4 video) and I need this audio to be connected to the whole video. 1) Do I need to crop the audio to the length that is obtained by merging all three videos ? 2) Is it possible to do this with one command, or i need first have to concatetate all together with my command, and then merge video and audio track ?

• FFMPEG Concat failing - System cannot find the file specified

  16 janvier 2017, par geekman

  I’m a PC. I just reversed a video, and want to combine the original file and the reversed file into one new output.mp4 file

  I’m using code copied directly from the ffmpeg wiki

  ffmpeg -i input1.mp4 -i input2.webm \
  
  -filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]" \
  
  -map "[v]" -map "[a]" <encoding options="options"> output.mkv
  
  </encoding>

  This is my version :

  ffmpeg -i C:\xampp\htdocs\reviews\uploads\0115171331.mp4 -i C:\xampp\htdocs\reviews\uploads\R0115171331.mp4 \
  
  -filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]" \
  
  -map "[v]" -map "[a]"  C:\xampp\htdocs\reviews\output.mp4

  And when I run it, it just gives me :

  The system cannot find the file specfied.

  Again, my other ffmpeg commands worked, and these files (except for output) do exist. I’ve double checked.

  Any idea what could be going wrong ?

• ffmpeg combine multiple FHD videos with concat option, but output is HD

  9 mars 2021, par Zawazawa

  I'm trying to combine multiple 1920x1080 videos(.MTS) with concat option, but output resolution is 1280x720.

  


  How can I combine multiple videos with keeping resolution ?

  


  Script is below.

  


  ffmpeg -safe 0 -f concat -i content_dir.txt -c:v copy -c:a copy -map 0:v -map 0:a output.MTS

  


  and the content of input text is below

  


  file '1.MTS'
file '2.MTS'
file '3.MTS'
file '4.MTS'


  


  the information of source videos is below.

  


  video codec h264_nvenc
audio codec ac3


  


  the output of command prompt is below.

  


  Input #0, concat, from 'E:\VideoMaker3\tmp_videos_o3_1\content_dir.txt':
  Duration: N/A, start: 0.000000, bitrate: 192 kb/s
    Stream #0:0: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 15 fps, 15 tbr, 90k tbn, 30 tbc
    Stream #0:1(eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s


  


  Thank you.

  


  Add

  


  This problem was caused by a little mistake. One of the input videos was 1280x720, so the resolution of the output was not FHD.
Thank you guys who gave me a comment.