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• ffmpeg : How do I set the framerate and keep the default image resolution ?

  8 septembre 2022, par Sprout Coder

  I have 23 frames inside a folder (each frame has the same resolution) :

  


  frame-1.png
frame-2.png
......
frame-23.png


  


  I want to create a 1 second video that will have the same resolution.
Each frame should therefore last for 1/23 seconds.

  


  I tried to following command :

  


  ffmpeg -r 23 -i "frame-%d.png" -c:v libx265 -r 23 out.mp4


  


  But my mac crashed.

  


  The resolution of each image is really big (15000x15000) but not big enough for ffmpeg to throw the usual "value is too big" (>INT_MAX) error..

  


  I think it crashes because my command is not correct.

  


  Could you please confirm what the correct command should be to achieve what I want ?

  


  Also, will the frames be ordered correctly according to this command ?

  


  Thank you in advance for your help

  


• How to effectively turn high resolution images into a video with ffmpeg ?

  5 septembre 2022, par Sprout Coder
  

  • I have 24 frames (frame-%d.png)

  


  • I want to turn them into a video that will be 1 second long

  


  • That means that each frame should play for 1/24 seconds

  


  


  I'm trying to figure out the correct settings in order to achieve that :

  


  await new Promise((resolve) => {
  ffmpeg()
    .on('end', () => {
      setTimeout(() => {
        console.log('done')
        resolve()
      }, 100)
    })
    .on('error', (err) => {
      throw new Error(err)
    })
    .input('/my-huge-frames/frame-%d.png')
    .inputFPS(1/24)
    .output('/my-huge-video.mp4')
    .outputFPS(24)
    .noAudio()
    .run()


  


  

  1. Are my inputFPS(1/24) & outputFPS(24) correct ?

  


  2. Each frame-%d.png is huge : 32400PX x 32400PX ( 720Mb). Will ffmpeg be able to generate such a video, and if so, will the video be playable ? If not, what is the maximum resolution each frame-%d.png should have instead ?

  


  3. Since the process will be quite heavy, I believe using the command line could be more appropriate. In that case, what is the equivalent of the above Js code in the command line (as in ffmpeg -framerate etc...) ?

  


  


• ffmpeg resize logo depending on video resolution with multiple outputs

  30 août 2022, par Panama Jack

  I'm having a tough time trying to get a logo above text in the lower right corner of my videos. The problem is depending on the video size and resolution the logo (image) is too big or too small. Sometimes it overlaps the text. How can I make it so that no matter what the resolution or ratio is, it scales proportionately and always above the text ? For example, videos of 1920x1080 at 16:9 or 1080x1920 9:16, or 1280x720 16:9 or 720x1280 9:16 and so on. Basically, it will always scale correctly on all outputs. Sometimes there might be more outputs but in this code sample there are 3 hls files. I tried scale2ref but can't get that to work and it makes my file sizes much bigger.

  


  Here's my current code.

  


  


  -filter_complex "[1:v]scale=150 :-2[logo] ;[0:v][logo]overlay=main_w-overlay_w-10:main_h-overlay_h-35,drawtext=fontfile=/var/www/area51-process1.somesite.com/html/includes/helveticaneue/HelveticaNeueMed.ttf:text=@somesite:fontcolor=white@0.9:fontsize=(h/32):x=w-tw-15:y=h-th-6,format=yuv420p,split=3[s0][s1][s2] ;[s0]scale=640:360[360p] ;[s1]scale=854:480[480p] ;[s2]scale=1280:720[720p]"
-map "[360p]" -map "[480p]" -map "[720p]" -maxrate:v:0 3000000 -bufsize:v:0 3000000 -maxrate:v:1 4000000 -bufsize:v:1 4000000 -maxrate:v:2 8000000 -bufsize:v:2 8000000 -map 0:a -c:a libfdk_aac -ac 2 -async 1 -ar 48000 -b:a 128k -c:v libx264 -preset veryfast -crf:v:0
25 -profile:v:0 high -crf:v:1 24 -profile:v:1 high -crf:v:2 23
-profile:v:2 high -g 50 -keyint_min 50 -force_key_frames "expr:gte(t,n_forced*2)" -sc_threshold 0 -flags +global_header
-movflags +faststart -max_muxing_queue_size 4096 -threads 0 -f tee "[select='v:0,a':f=hls:start_number=0:hls_flags=single_file:hls_playlist_type=vod:hls_segment_type=fmp4:hls_time=4:hls_list_size=0:hls_segment_filename=/var/www/area51-process1.somesite.com/html/v/OHE4f9WSezA-078f9ec1-2f2b-4a6b-a34d-a8c9d4c39d7b-360p-segment.mp4]/var/www/area51-process1.somesite.com/html/v/OHE4f9WSezA-078f9ec1-2f2b-4a6b-a34d-a8c9d4c39d7b-360p.m3u8|[select='v:1,a':f=hls:start_number=0:hls_flags=single_file:hls_playlist_type=vod:hls_segment_type=fmp4:hls_time=4:hls_list_size=0:hls_segment_filename=/var/www/area51-process1.somesite.com/html/v/OHE4f9WSezA-078f9ec1-2f2b-4a6b-a34d-a8c9d4c39d7b-480p-segment.mp4]/var/www/area51-process1.somesite.com/html/v/OHE4f9WSezA-078f9ec1-2f2b-4a6b-a34d-a8c9d4c39d7b-480p.m3u8|[select='v:2,a':f=hls:start_number=0:hls_flags=single_file:hls_playlist_type=vod:hls_segment_type=fmp4:hls_time=4:hls_list_size=0:hls_segment_filename=/var/www/area51-process1.somesite.com/html/v/OHE4f9WSezA-078f9ec1-2f2b-4a6b-a34d-a8c9d4c39d7b-720p-segment.mp4]/var/www/area51-process1.somesite.com/html/v/OHE4f9WSezA-078f9ec1-2f2b-4a6b-a34d-a8c9d4c39d7b-720p.m3u8"