dv speed preview ffmpeg.sh

#capture
dvgrab -showstatus -srt -timestamp

#create index
rm list.txt
for f in ./*.dv; do echo "file '$f'" >> list.txt; done
ffmpeg -f concat -safe 0 -i list.txt -filter:v "setpts=PTS/30" -framerate 60 -deinterlace speed-index.mp4
rm list.txt

#convert dv files to mp4 with embded subtitles
for f in ./*.dv; do ffmpeg -i $f -f srt -i ${f%.*}.srt0  -c:s mov_text -hide_banner -deinterlace  -c:v libx264 -preset slow -crf 17 -pix_fmt yuv420p   ${f%.*}.mp4;done 

#concat mp4 files
rm list.txt
for f in ./*.mp4; do echo "file '$f'" >> list.txt; done
ffmpeg -f concat -safe 0 -i list.txt -c:v copy -c:s copy cassete.mp4
rm list.txt

#extract subtitles
ffmpeg -txt_format text -i cassete.mp4 cassete.srt
#remove font tags from srt subtitles
sed -e 's/<[^>]*>//g' cassete.srt > cassete.srt.tmp && mv cassete.srt.tmp cassete.srt