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• FFmpeg Keeps Outputting 4:3 aspect ratio - No Idea Why

  11 janvier 2020, par John Doe

  This command will produce a 1920x1080 video, however there are borders on the left and right, making it appear 4:3 rather than the proper 16:9, and also warps/stretches the overlays. I have checked (and rechecked) my input files and they’re all 1920x1080. This is such a silly problem and I feel like I’m missing something obvious.

  ffmpeg -y -f concat -i "concat.txt" -i "mask.png" -i "audio.mp3" -filter_complex "[0]scale=3840x2160,zoompan=z='if(lte(zoom,1.0),1.2,max(1.001,zoom-0.0010))':x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':fps=15:d=200[p];[p][1]overlay,drawtext=fontfile=Heathergreen.otf:text='Testing':fontcolor=black:fontsize=32:x=140:y=950[v];[2:a]showwaves=mode=cline:s=178x56:r=15:scale=sqrt:colors=0x222222,colorkey=0x000000:0.01:0.1,format=yuva420p[w];[v][w]overlay=108:740,scale=1920:1080[outv]" -map "[outv]" -map 2:a -c:v libx264 -c:a aac -preset ultrafast -shortest "output.mp4"

• How can I concatenate multiple videos while maintaining the original aspect ratio of each

  25 décembre 2019, par Antony

  How can I concatenate multiple videos while maintaining the original aspect ratio ? I think there are 2 approaches to do this. Either scale videos one by one or concatenate them all with one command. Currently, I’m using the following command

  ffmpeg -i 1.mp4 -i 2.mp4 -filter_complex "[0]scale=iw*sar:ih,setsar=1[ref];[1][ref]scale2ref=w=oh*mdar:h=ih[s][v0];[s]pad=1024:576:(ow-iw)/2:(oh-ih)/2,setsar=1[v1];[v0][0:a:0][v1][1:a:0]concat=n=2:v=1:a=1[v][a]" -map "[v]" -map "[a]" out.mp4

  In the above example the reference video(1.mp4) is 720x576[SAR 64:45 DAR 16:9]. This works great for concatenating 2 videos but I don’t know how to make it more dynamic.

  So how could I make the command above work for 3 videos ? Either scaling & concatenating 1 by 1 or all together.

• How to concatenate two or more videos with same width and different height in FFMpeg and to maintain the same aspect ratio ?

  25 octobre 2019, par Aarwil

  I have five video parts to concat all. Each five videos are in the same width and height. The second part is the hstack of another 2 videos and the third part is the hstack and vstack of another 3 videos. While concat all the five video parts the aspect ratio is not maintaining in the final video. Since I am new to ffmpeg help me to sort out the problem

  I have tried with the command in my final with filter complex and to reduce the size I used frame per second.

  "ffmpeg -i
final.mp4 -vf scale=1280:480 -filter:v fps=fps=30 finalNew.mp4"

  but nothing worked.
  Also help me to use hstack with scaling, to maintain the aspect ratio for the second part on below command

  Command : ffmpeg -i vid1.mkv -i vid2.mkv -filter_complex "[0:v]scale=-1:480[v0] ;[0:v][1:v]hstack=inputs=2"vid3.mkv

  Images

  second part

  third part

  videochunks

  I have console the info of my video

  ffmpeg -i part1.mkv -i part2.mkv -i part3.mkv -i part4.mkv -i part5.mkv
ffmpeg version N-94911-g197985c5bf Copyright (c) 2000-2019 the FFmpeg developers
 built with gcc 9.1.1 (GCC) 20190807
 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
 libavutil      56. 35.100 / 56. 35.100
 libavcodec     58. 56.101 / 58. 56.101
 libavformat    58. 32.104 / 58. 32.104
 libavdevice    58.  9.100 / 58.  9.100
 libavfilter     7. 58.102 /  7. 58.102
 libswscale      5.  6.100 /  5.  6.100
 libswresample   3.  6.100 /  3.  6.100
 libpostproc    55.  6.100 / 55.  6.100
Input #0, matroska,webm, from 'part1.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:00:44.00, start: 0.000000, bitrate: 189 kb/s
   Stream #0:0(eng): Video: h264 (High), yuv420p(progressive), 640x480 [SAR 9:16 DAR 3:4], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     title           : Video
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:00:44.000000000
Input #1, matroska,webm, from 'part2.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:01:22.07, start: 0.000000, bitrate: 113 kb/s
   Stream #1:0: Video: h264 (High), yuv420p(progressive), 640x240 [SAR 9:16 DAR 3:2], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:01:22.066000000
Input #2, matroska,webm, from 'part3.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:00:42.03, start: 0.000000, bitrate: 405 kb/s
   Stream #2:0: Video: h264 (High), yuv420p(progressive), 640x720 [SAR 9:16 DAR 1:2], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:00:42.033000000
Input #3, matroska,webm, from 'part4.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:00:21.00, start: 0.000000, bitrate: 298 kb/s
   Stream #3:0: Video: h264 (High), yuv420p(progressive), 640x240 [SAR 9:16 DAR 3:2], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:00:21.000000000
Input #4, matroska,webm, from 'part5.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:00:16.00, start: 0.000000, bitrate: 169 kb/s
   Stream #4:0(eng): Video: h264 (High), yuv420p(progressive), 640x480 [SAR 9:16 DAR 3:4], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     title           : Video
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:00:16.000000000