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• Need to set Multiple drawtext in same line one after the other. but unable to do so via FFMPEG command

  9 septembre 2019, par balpreet singh

  Hi Am trying to create a FFMPEG command for Text overlay on video that has partially text as bold. I am using the following command. but am unable to figure out how to pass the x position of 1st ending part.

  ffmpeg -i b.mp4 -vf "drawtext=fontfile=arial.ttf:text='Title of this video is ':fontcolor=blue:fontsize=20,drawtext=fontfile=ariali.ttf:text='How to have a healthy Life':fontcolor=yellow:fontsize=20:x=**<width of="of" 1st="1st" text="text">**" -c:v libx264 -c:a copy -movflags +faststart output.mp4 -y
  
  </width>

• Green tint color shift converting RGBA to YUV420p ffmpeg libavcodec

  2 août 2017, par Michael B

  I was wondering someone could help. I’m currently taking converting RBGA bitmaps to YUV420p before encoding the frames with h264 codec and dumping the encoded packets to file successfully.

  I’m also able to playback the h264 video file in VLC. However, there seems to be a color shift which is more apparent where grey is actually light tint of screen. I’m used a an animation video as my example which is supposed to show a blue sky in the background, however after converting the image, I’m getting an orange sky background. Do you have any ideas how I can fix this please ?

  Do you happen to know if it’s possible to convert rgba to yuv BEFORE calling sws_scale and before encoding packet ?

• ffmpeg how to put color overlay over video

  13 mai 2020, par flieks

  I want to put a color overlay (blue, red or green or hex value) over a video giving it a Instagram filter like effect.

  



  I think it should be in the lines of :

  



  ffmpeg -i video.mp4 -i "red.png" -filter_complex "blend=all_mode='screen':all_opacity=0.7" output.mp4


  



  or maybe with all_mode=overlay

  



  But I get an error :

  



  First input link top parameters (SAR 0:1) do not match the corresponding second input link bottom parameters (SAR 1:1).


  



  I also tried with lutrgb=r=1.5, but that didn't give it a red color (it takes the red away).

  



  What am i doing wrong ?