user21066: For the project that I'm working on I have to cut some parts of same video with some subtitles. So I made a bash file that executes multiple ffmpeg commands like this.
ffmpeg -i input.mp4 -vf scale="w=640:h=-2",drawtext="fontfile=/usr/share/fonts/truetype/msttcorefonts/verdana.ttf: textfile='1.txt': fontcolor=white: fontsize=20: box=1: boxcolor=black@0.5: boxborderw=5: x=(w-text_w)/2: y=((h-text_h)/2)+90:" -ss 00:00:45.674 -to 00:00:50.093 -async 1 ./out/1.mp4

ffmpeg -i input.mp4 -vf scale="w=640:h=-2",drawtext="fontfile=/usr/share/fonts/truetype/msttcorefonts/verdana.ttf: textfile='2.txt': fontcolor=white: fontsize=20: box=1: boxcolor=black@0.5: boxborderw=5: x=(w-text_w)/2: y=((h-text_h)/2)+90:" -ss 00:00:49.344 -to 00:00:52.971 -async 1 ./out/2.mp4

but it fast for first times (start) of the input file, it gets slower if I want to start seeking from middle or near end of input. So it gets nearly 7-8 minutes for 22. minute of the input file...
ffmpeg -i input.mp4 -vf scale="w=640:h=-2",drawtext="fontfile=/usr/share/fonts/truetype/msttcorefonts/verdana.ttf: textfile='226.txt': fontcolor=white: fontsize=20: box=1: boxcolor=black@0.5: boxborderw=5: x=(w-text_w)/2: y=((h-text_h)/2)+90:" -ss 00:22:23.345 -to 00:22:25.846 -async 1 ./out/226.mp4

Anybody knows better way to do that?
Can I do that without seeking file each time? (Because it seems this is a seeking problem to me....)

user1871: Use ss/to as input options. This seeks at the demuxer stage, which is much faster.
ffmpeg -ss 00:22:23.345 -to 00:22:25.846 -i input.mp4 ...

You'll need a very recent build of ffmpeg (> Nov 19 2017)

21066: <p>For the project that I'm working on I have to cut some parts of same video with some subtitles. So I made a bash file that executes multiple ffmpeg commands like this.</p>

<pre><code>ffmpeg -i input.mp4 -vf scale="w=640:h=-2",drawtext="fontfile=/usr/share/fonts/truetype/msttcorefonts/verdana.ttf: textfile='1.txt': fontcolor=white: fontsize=20: box=1: boxcolor=black@0.5: boxborderw=5: x=(w-text_w)/2: y=((h-text_h)/2)+90:" -ss 00:00:45.674 -to 00:00:50.093 -async 1 ./out/1.mp4

ffmpeg -i input.mp4 -vf scale="w=640:h=-2",drawtext="fontfile=/usr/share/fonts/truetype/msttcorefonts/verdana.ttf: textfile='2.txt': fontcolor=white: fontsize=20: box=1: boxcolor=black@0.5: boxborderw=5: x=(w-text_w)/2: y=((h-text_h)/2)+90:" -ss 00:00:49.344 -to 00:00:52.971 -async 1 ./out/2.mp4
</code></pre>

<p>but it fast for first times (start) of the input file, it gets slower if I want to start seeking from middle or near end of input. So it gets nearly 7-8 minutes for 22. minute of the input file...</p>

<pre><code>ffmpeg -i input.mp4 -vf scale="w=640:h=-2",drawtext="fontfile=/usr/share/fonts/truetype/msttcorefonts/verdana.ttf: textfile='226.txt': fontcolor=white: fontsize=20: box=1: boxcolor=black@0.5: boxborderw=5: x=(w-text_w)/2: y=((h-text_h)/2)+90:" -ss 00:22:23.345 -to 00:22:25.846 -async 1 ./out/226.mp4
</code></pre>

<p>Anybody knows better way to do that?
Can I do that without seeking file each time? (Because it seems this is a seeking problem to me....)</p>
 1871: <p>Use ss/to as input options. This seeks at the demuxer stage, which is much faster.</p>

<pre><code>ffmpeg -ss 00:22:23.345 -to 00:22:25.846 -i input.mp4 ...
</code></pre>

<p>You'll need a very recent build of ffmpeg (> Nov 19 2017)</p>
