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• FFMPEG Overlay not display when position increased

  20 février 2014, par user1250758

  I'm trying to create a video using ffmpeg using a background image, a centered main image and an audio file. All is working fine until I try to position the centered image where I want it, it seems to work with smaller x values correctly but when I increase it to the 290px required to center it it vanishes from the video completely. When set to 100 it displays correctly positioned 100px from the left. Command below, any ideas ?

  ffmpeg -loop 1  -i background_1280x720.jpg  -i foreground_1000x1000.jpg -filter_complex "[0] scale=1280x720; [1] scale=500x500 [over]; [0][over] overlay=290:0"  -ss 30  -i audio.wav  -af afade=t=in:st=0:d=20  -t 40   -c:v libx264 -c:a aac -strict experimental -b:a 192k -shortest -pix_fmt yuv420p -s 1280x720 test.mp4

  When I change it to overlay=100:0 instead of overlay=290:0 all works as expected. Just to add the background image is already correctly sized but the foreground image is oversized and being scaled to 500x500.

• Size of files was increased after splitting by Ffmpeg

  29 avril 2014, par user3584205

  I use this code to split file to multiple parts :

  @echo off
  
  for %%i in (*.mp4) do ( 
  
    ffmpeg -i "%%~i" -vcodec copy -acodec copy -ss 00:00:00 -t 00:00:05 "D:\Ebook\%%~ni_1.mp4"
  
    ffmpeg -i "%%~i" -vcodec copy -acodec copy -ss 00:00:05 -t 00:00:10 "D:\Ebook\%%~ni_2.mp4"
  
    ffmpeg -i "%%~i" -vcodec copy -acodec copy -ss 00:00:10 "D:\Ebook\%%~ni_3.mp4"
  
    )
  
  pause

  It worked but I have a problem. It is total size of parts is larger than original file.

  Original : 700 MB and after splitting :

  Part 1: 225
  
  Part 1: 500
  
  Part 2: 250

  Why ? And how to keep same quality and size of files after splitting ? Thank you very much !

• file sequence (%d) not working when increased to 3 digits FFMPEG

  13 avril 2018, par Junaid Farooq

  I have this kind of image sequence in my folder.

  113.jpg  119.jpg  125.jpg  131.jpg  164.jpg  17.jpg   175.jpg  180.jpg  23.jpg  29.jpg  35.jpg  68.jpg  74.jpg  80.jpg  CURRENT
  
  114.jpg  120.jpg  126.jpg  132.jpg  165.jpg  170.jpg  176.jpg  181.jpg  24.jpg  30.jpg  36.jpg  69.jpg  75.jpg  81.jpg  list.txt
  
  115.jpg  121.jpg  127.jpg  133.jpg  166.jpg  171.jpg  177.jpg  19.jpg   25.jpg  31.jpg  37.jpg  70.jpg  76.jpg  82.jpg  testingplease.mp4
  
  116.jpg  122.jpg  128.jpg  161.jpg  167.jpg  172.jpg  178.jpg  20.jpg   26.jpg  32.jpg  65.jpg  71.jpg  77.jpg  83.jpg
  
  117.jpg  123.jpg  129.jpg  162.jpg  168.jpg  173.jpg  179.jpg  21.jpg   27.jpg  33.jpg  66.jpg  72.jpg  78.jpg  84.jpg
  
  118.jpg  124.jpg  130.jpg  163.jpg  169.jpg  174.jpg  18.jpg   22.jpg   28.jpg  34.jpg  67.jpg  73.jpg  79.jpg  85.jpg

  When I run this command to create a video file

  ffmpeg -r 6 -i /storage/taked-qzaxs/extract/1239/%d.jpg -c:v h264_nvenc -r 6 -preset slow -bufsize 1000k -pix_fmt yuv420p -y /storage/taked-qzaxs/extract/1239/testingplease.mp4

  It throws me such error as

  [image2 @ 0x55ad2ff3d460] Could find no file with path '/storage/taked-qzaxs/extract/1239/%d.jpg' and index in the range 0-4
  
  /storage/taked-qzaxs/extract/1239/%d.jpg: No such file or directory

  Whereas the same command works fine when there are only 10 or 15 images, and image number is within 2 digits range. I don’t know what is wrong with this command. I am using %d, which means it should take all natural numbers in sort form.