Java question sample using ffmpeg : Code in Description
#!/bin/sh
ffmpeg -y -i video.mov -filter_complex \
"[0]split[base][text];[text] \
drawtext=fontfile=gvr.otf:text='Which of these is not an event listener adapter defined in the java.awt.event package?': fontcolor=white: fontsize=40: x=100:y=200, \
format=yuva444p,fade=t=in:st=1:d=1:alpha=1,fade=t=out:st=18:d=1:alpha=1[subtitles]; \
[base][subtitles]overlay" test_out.mp4
ffmpeg -y -i test_out.mp4 -filter_complex \
"[0]split[base][text];[text] \
drawtext=fontfile=gvr.otf:text='a) public void apple(String s, int i) {}': fontcolor=white: fontsize=40: x=100:y=(200) + 50 * 2, \
format=yuva444p,fade=t=in:st=3:d=1:alpha=1,fade=t=out:st=15:d=1:alpha=1[subtitles]; \
[base][subtitles]overlay" test_out1.mp4
ffmpeg -y -i test_out1.mp4 -filter_complex \
"[0]split[base][text];[text] \
drawtext=fontfile=gvr.otf:text='b) public int apple(int i, String s) {}': fontcolor=white: fontsize=40: x=100:y=(200) + 50 * 3, \
format=yuva444p,fade=t=in:st=4:d=1:alpha=1,fade=t=out:st=18:d=1:alpha=1[subtitles]; \
[base][subtitles]overlay" test_out2.mp4
ffmpeg -y -i test_out2.mp4 -filter_complex \
"[0]split[base][text];[text] \
drawtext=fontfile=gvr.otf:text='c) public void apple(int i, String mystring) {}': fontcolor=white: fontsize=40: x=100:y=(200) + 50 * 4, \
format=yuva444p,fade=t=in:st=5:d=1:alpha=1,fade=t=out:st=18:d=1:alpha=1[subtitles]; \
[base][subtitles]overlay" test_out3.mp4
ffmpeg -y -i test_out3.mp4 -filter_complex \
"[0]split[base][text];[text] \
drawtext=fontfile=gvr.otf:text='d) public void Apple(int i, String s) {}': fontcolor=white: fontsize=40: x=100:y=(200) + 50 * 5, \
format=yuva444p,fade=t=in:st=6:d=1:alpha=1,fade=t=out:st=15:d=1:alpha=1[subtitles]; \
[base][subtitles]overlay" test_out4.mp4
ffmpeg -y -i test_out4.mp4 -filter_complex \
"[0]split[base][text];[text] \
drawtext=fontfile=gvr.otf:text='a) public void apple(String s, int i) {}': fontcolor=green: fontsize=40: x=100:y=(200) + 50 * 2, \
format=yuva444p,fade=t=in:st=15:d=1:alpha=1,fade=t=out:st=18:d=1:alpha=1[subtitles]; \
[base][subtitles]overlay" test_out5.mp4
ffmpeg -y -i test_out5.mp4 -filter_complex \
"[0]split[base][text];[text] \
drawtext=fontfile=gvr.otf:text='d) public void Apple(int i, String s) {}': fontcolor=green: fontsize=40: x=100:y=(200) + 50 * 5, \
format=yuva444p,fade=t=in:st=15:d=1:alpha=1,fade=t=out:st=18:d=1:alpha=1[subtitles]; \
[base][subtitles]overlay" test_out6.mp4
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