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• Converting multiple ffmpeg command into one line (burn subtitle & watermark)

  14 septembre 2019, par Ammad Khalid

  i’m first burning subtitles of mkv and then adding watermark which is taking so long to convert one video. It takes like x2 time i guess. For example on my current server it takes 30 min on each command. My server may not be good enough. But i was thinking if there way to do this in one command instead ? will it effect the speed ? i really have almost zero knowledge on ffmpeg :

  here is command for burning subtitle. I’m using python for achieving this :

  ffmpeg -i subtitles=/Users/Test/Desktop/test.mkv -vf subtitles=subtitles=subtitles=/Users/Test/Desktop/test.mkv -c:v libx264 -c:a aac -preset ultrafast -strict -2 /Users/Test/Desktop/test.mp4

  command for adding watermark :

  ffmpeg -i /Users/Test/Desktop/test.mp4 -i /Users/Test/Desktop/watermark-logo.png -filter_complex "[1][0]scale2ref=w='iw*10/100':h='ow/mdar'[wm][vid]; [vid][wm]overlay=main_w-overlay_w-5:main_h-overlay_h-5" /Users/Test/Desktop/output.mp4

  If there are more ways to speed up then kindly let me know. All i want to achieve this faster and expecting best result.
  Thank you.

• ffmpeg add semi transparent watermark(png) with different size

  29 juillet 2020, par Archer

  I'm trying to add a png watermark (with alpha channel) over h264 video with semi transparent. By using overlay filter I managed to add watermark to the video.

  



  ffmpeg -y -i input.mp4 -i watermark.png -filter_complex "[0][1] overlay=0:0" -c:v libx264 -an output.mp4


  



  But overlay filter does not provide transparent option. So I tried to use blend filter. However, when I use origin resolution, error message comes out.

  



  ffmpeg -y -i input.mp4 -i watermark.png -filter_complex "[0][1]blend=all_mode=overlay:all_opacity=0.3" -c:v libx264 -an output.mp4


  



  Output :

  



    libavutil      55. 28.100 / 55. 28.100
  libavcodec     57. 48.101 / 57. 48.101
  libavformat    57. 41.100 / 57. 41.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 47.100 /  6. 47.100
  libavresample   3.  0.  0 /  3.  0.  0
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  1.100 /  2.  1.100
  libpostproc    54.  0.100 / 54.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.41.100
  Duration: 00:00:45.08, start: 0.000000, bitrate: 1872 kb/s
    Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080, 1869 kb/s, 29.72 fps, 30 tbr, 16k tbn, 32k tbc (default)
    Metadata:
      handler_name    : VideoHandler
Input #1, png_pipe, from 'watermark.png':
  Duration: N/A, bitrate: N/A
    Stream #1:0: Video: png, rgba(pc), 64x64, 25 tbr, 25 tbn, 25 tbc
[Parsed_blend_0 @ 00750600] First input link top parameters (size 1920x1080, SAR 0:1) do not match the corresponding second input link bottom parameters (64x64, SAR 0:1)
[Parsed_blend_0 @ 00750600] Failed to configure output pad on Parsed_blend_0
Error configuring complex filters.
Invalid argument


  



  The result looks like some resolution issue with the parameters. So that I tried to scale the watermark before blending.

  



  ffmpeg -y -i input.mp4 -i watermark.png -filter_complex "[0:0]scale=1920x1080[a]; [1:0]scale=1920x1080[b]; [a][b]blend=all_mode=overlay:all_opacity=0.3" -c:v libx264 -an output.mp4


  



  FFMPEG works with these parameters. But the output wasn't I expected, because watermark had been stretched.
Any idea to blend watermark with different resolution without stretching to video with transparency ?

  



  Here are the testing file. (ffmpeg version 3.1.2)
https://drive.google.com/open?id=0B2X3VLS01TogdHVJZ2I1ZC1GUUU
https://drive.google.com/open?id=0B2X3VLS01TogbjhuZTlBOFFpN1k

  


• Animated watermark moving on the edges of the movie - ffmpeg

  25 février, par saeid ezzati

  I wanna overlay a picture on a video, as a watermark. How do I insert an animated watermark that randomly moves from side to side.

  



  For example, 
A watermark, placed on top/ upper-left corner, moves randomly to the top/upper-right corner and freezes there for five seconds before moving down to the lower- right corner.

  



  I don't want the watermark to have a cross movement and move from the upper-right corner to the lower-left corner.

  



  Here is an example of my code, using which the watermark randomly jumps to a corner each 200 frames without animate :

  



  ffmpeg -i "source.mp4" -i "watermark.png" -filter_complex "[1:v]scale=50:-1[a]; [0:v][a]overlay=x='st(0,floor(random(n)*2)+1);if(eq(mod(n-1,200),0), if(eq(ld(0),1),0,  main_w-overlay_w   ) ,x)':y='st(0,floor(random(n)*2)+1);if(eq(mod(n-1,200),0),if(eq(ld(0),1),0,  main_h-overlay_h   ),y)'" -codec:a copy "out.mp4"