On Sat, Apr 11, 2020 at 23:03:31 +0200, Michael Koch wrote: > I want to show the content of a credits file scrolling up.The file > contains many lines of different lengths. > > drawtext=textfile=credits.txt:x=(w-text_w)/2:y=h-100*t > > The variable text_w is the width of the longest line in the text file. > This line is center-aligned in the frame, and all other (shorter) lines > are left-aligned to the same X position as the longest line. > But that's not what I want. Is it somehow possible that each line is > center-aligned?
I can't answer your question, unfortunately, but how about an alternative? You can write your credits as ASS subtitles, and have ffmpeg render them on top of your video. The example I retrieved here: http://forum.doom9.org/showthread.php?t=82025 works just fine. Use this as credits.ass: ---snip--- [Script Info] ScriptType: v4.00+ Collisions: Normal PlayResX: 640 PlayResY: 480 Timer: 100.0000 [V4+ Styles] Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding Style: testStyle,Verdana,24,&H4099ffff,&H00000000,&Hc0000000,&H00000000,-1,0,0,0,100,100,0,0.00,1,1,0,8,0,0,0,0 [Events] Format: Layer, Start, End, Style, Actor, MarginL, MarginR, MarginV, Effect, Text Dialogue: 0,0:00:02.00,0:00:12.00,testStyle,,0000,0000,0000,,{\move(320,400,320,80)}{\fad(1000,1000)}Foo bar Dialogue: 0,0:00:04.00,0:00:14.00,testStyle,,0000,0000,0000,,{\move(320,400,320,80)}{\fad(1000,1000)}Baz Dialogue: 0,0:00:06.00,0:00:16.00,testStyle,,0000,0000,0000,,{\move(320,400,320,80)}{\fad(1000,1000)}Qux quux quuux Dialogue: 0,0:00:08.00,0:00:18.00,testStyle,,0000,0000,0000,,{\move(320,400,320,80)}{\fad(1000,1000)}Xyzzy ---snip--- and overlay it onto your video: $ ffmpeg -f lavfi -i testsrc=s=640x480 -vf subtitles=credits.ass -f nut - | ffplay - ASS is tricky to create manually, but you might figure out the concept from the example, or use a tool to create them. Cheers, Moritz _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
