[FFmpeg-user] Add a pad problem

[Anders Arveryd]

Hi, 
I'm new with ffmpeg, and trying to make a slideshow of some images. It works fine, but when I have a vertical image, I want to add a pad around to keep the 3/2 ratio. Then I get this error message and I can't figure it out what is wrong, its something about the dimensions but what? It has a slow zoompan and transitions between image. All that works fine.


The problem is this: pad=ih*1.5:ih:(ow-iw)/2:(oh-ih)/2,

It doesn't help if I change to: pad=2000:1333:(ow-iw)/2:(oh-ih)/2,

If I removes the pad part then it works but the vertical images are stretched out.


The command:
ffmpeg -i img1.jpg -i img2.jpg -i img3.jpg -i img4.jpg -filter_complex "color=c=white:r=60:size=2000x1333:d=21[black];[0:v]format=pix_fmts=yuva420p,pad=ih*1.5:ih:(ow-iw)/2:(oh-ih)/2,zoompan=z='if(eq(on,1),1,zoom+0.00025)':x='0':y='0':fps=60:d=60*6:s=2000x1333,fade=t=in:st=0:d=1:alpha=0,fade=t=out:st=5:d=1:alpha=1,setpts=PTS-STARTPTS[v0];[1:v]format=pix_fmts=yuva420p,pad=ih*1.5:ih:(ow-iw)/2:(oh-ih)/2,zoompan=z='if(eq(on,1),1,zoom+0.00025)':x='iw-iw/zoom':y='0':fps=60:d=60*6:s=2000x1333,fade=t=in:st=0:d=1:alpha=1,fade=t=out:st=5:d=1:alpha=1,setpts=PTS-STARTPTS+1*5/TB[v1];[2:v]format=pix_fmts=yuva420p,pad=ih*1.5:ih:(ow-iw)/2:(oh-ih)/2,zoompan=z='if(eq(on,1),1,zoom+0.00025)':x='0':y='ih-ih/zoom':fps=60:d=60*6:s=2000x1333,fade=t=in:st=0:d=1:alpha=1,fade=t=out:st=5:d=1:alpha=1,setpts=PTS-STARTPTS+2*5/TB[v2];[3:v]format=pix_fmts=yuva420p,pad=ih*1.5:ih:(ow-iw)/2:(oh-ih)/2,zoompan=x='0':y='0':fps=60:d=60*6:s=2000x1333,fade=t=in:st=0:d=1:alpha=1,setpts=PTS-STARTPTS+3*5/TB[v3];[black][v0]overlay[ov0];[ov0][v1]overlay[ov1];[ov1][v2]overlay[ov2];[ov2][v3]overlay=format=yuv420" -c:v libx264 -y out.mp4

Ffmpeg output:
ffmpeg version N-97033-gc455a28 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
  configuration: --pkg-config-flags=--static --extra-libs=-lpthread --extra-libs=-lm --enable-gpl --enable-libfreetype --enable-libopus --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree
  libavutil      56. 42.101 / 56. 42.101
  libavcodec     58. 76.100 / 58. 76.100
  libavformat    58. 42.100 / 58. 42.100
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 77.100 /  7. 77.100
  libswscale      5.  6.101 /  5.  6.101
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
Input #0, image2, from 'img1.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 1088252 kb/s
    Stream #0:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 2453x3680, 25 tbr, 25 tbn, 25 tbc
Input #1, image2, from 'img2.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 1145221 kb/s
    Stream #1:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 2453x3680, 25 tbr, 25 tbn, 25 tbc
Input #2, image2, from 'img3.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 965134 kb/s
    Stream #2:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 2453x3680, 25 tbr, 25 tbn, 25 tbc
Input #3, image2, from 'img4.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 1819752 kb/s
    Stream #3:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 5315x3543, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 (mjpeg) -> format
  Stream #1:0 (mjpeg) -> format
  Stream #2:0 (mjpeg) -> format
  Stream #3:0 (mjpeg) -> format
  overlay -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[swscaler @ 0x3951b00] deprecated pixel format used, make sure you did set range correctly
[Parsed_pad_3 @ 0x3938c40] Padded dimensions cannot be smaller than input dimensions.
[Parsed_pad_3 @ 0x3938c40] Failed to configure input pad on Parsed_pad_3
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #3:0
Conversion failed!


# END

Thanks in advance for any help!

Best regards
Anders