Changes between Version 1 and Version 2 of Ticket #9750


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Timestamp:
Apr 26, 2022, 3:54:43 AM (4 years ago)
Author:
windowsair
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  • Ticket #9750

    • Property Priority normal → important

  • Ticket #9750 – Description

    v1 v2  
    2828
    2929The complete output is given in the file ffmpeg.log
     30
     31
     32== How to reproduce (Using transparent black)
     33
     34This command uses lavfi to simulate the transparent black output of RGBA. For demonstration purposes only, you may need ctrl+c to prevent infinite output.
     35
     36{{{
     37% ffmpeg.exe -y -i a1.mp4 -f lavfi -i "color=color=black@0.0:size=1920x540,format=rgba" -filter_complex "[0:v][1:v]overlay=x=0:y=0:alpha=premultiplied[v]" -map "[v]"  -c:v:0 libx264 -f mp4  output.mp4
     38}}}
     39
     40
     41The results show that the upper part is more whitish (brighter).