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| | qw 邮箱：[email protected] | 签名由 网易邮箱大师 定制 在2018年06月05日 06:18，DopeLabs 写道： i think this is what your looking for... this will pad 0's to the left to achieve a 5 digit number please note the level of escaping you need depends on your environment text='%{eif\\:n+1\\:d\\:5}' > On Jun 3, 2018, at 8:54 46PM, qw <[email protected]> wrote: > > Hi, > > > I can use the following command to add frame number on video: > > > /usr/local/bin/ffmpeg -t 180 -i input.mp4 -acodec libfdk_aac -ac 2 -b:a 48k > -vcodec libx264 -b:v 500k -g 25 \ > -vf "fps=fps=25, scale=w=320:h=240, > drawtext='box=1:fontcolor=red:fontsize=20:fontfile=OpenSans-Regular.ttf:text=%{frame_num}'" > \ > -f mp4 out.mp4 > > > But the width of the text box will increase as frame number increases. I want > to make the width of the text box unchanged. If the largest frame number is > 99999, I want to make the width of the text is of 5 numbers. How to do it? > > > > > Another question: > > > I want to make the following logic for text: > > > if frame number < 10 > text=0000%{frame_num} > else if frame number < 100 > text=000%{frame_num} > else if frame number < 1000 > text=00%{frame_num} > else if frame number < 10000 > text=0%{frame_num} > else > text=%{frame_num} > > > How to do it? How can I add expression in text? Is there any command example? > > > Thanks > > regards > > andrew > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
