Recherche avancée

Sur d’autres sites (11141)

• Issues with adding the current timestamp of a video when using FFPLAY

  28 janvier 2023, par lalelarsen1

  Hi i am trying to add to display the current time of the video as an overlay. i have tried to do follow the answer of this previous post : https://superuser.com/questions/968685/how-to-display-current-time-with-the-ffplay-exe but with no luck.

  


  This is my line of code :

  


  "./ffmpeg-2023-01-25-git-2c3107c3e9-full_build/bin/ffplay.exe" -vf "drawtext=fontfile=./consola.ttf:text='%{pts:hms}':fontsize=48:fontcolor=white:box=1:boxborderw=6:boxcolor=black@0.75:x=(w-text_w)/2:y=h-text_h-20" -i "%shadowplays_folder%\%NEWEST_FOLDER%\%NEWEST_FILE%" -autoexit -x "1000" -alwaysontop


  


  This will display the text "hms}" not the time.

  


  the above code works fine if i replace it with a simple string :

  


  "./ffmpeg-2023-01-25-git-2c3107c3e9-full_build/bin/ffplay.exe" -vf "drawtext=fontfile=./consola.ttf:text='test':fontsize=48:fontcolor=white:box=1:boxborderw=6:boxcolor=black@0.75:x=(w-text_w)/2:y=h-text_h-20" -i "%shadowplays_folder%\%NEWEST_FOLDER%\%NEWEST_FILE%" -autoexit -x "1000" -alwaysontop


  


  This will display the text "test"

  


  what am i missing ?

  


• Create 256 color palette video

  2 mars 2020, par rlcabral

  I already have this working by converting the source video to GIF with :

  ffmpeg -y -t 5 source.mp4 -vf fps=10,scale=480:-1,smartblur=ls=-0.5,crop=iw:ih-2:0:0 -hide_banner -loglevel panic output.gif

  And then converting the GIF to MP4, like so :

  ffmpeg -y animated.gif -hide_banner -pix_fmt yuvj420p -loglevel panic -an -loglevel panic final.mp4

  What I want is to convert source.mp4 directly to final.mp4, and have the same 256 color palette as a normal GIF.

  I tried merging both commands together, and although it generates a MP4, the result is a 16 bit video, surprisingly smaller than a 8 bit video.

  Do I need to generate a palette first with palettegen and then re-encode the video with this palette ?

• Use ffmpeg to resize one input's dimension to match another input's dimension

  18 novembre 2022, par Hans GD

  I need to resize one image A to match one dimension of another input B (make height of A match the height of B, for example). I will do this for several pairs of images in a folder, for which I will use a script in the end, but I wanted to know if this particular operation can be done only with ffmpeg.

  


  Again, the final script could read the image, find the size and use scale=-1:height to accomplish the final goal, but is it posible to make the title's operation only with ffmpeg ?