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Timelapse on Linux
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ffmpeg -framerate 30 -pattern_type glob -i '*.JPG' -s hd1080 -c:v libx264 -crf 18 30fps_1080p_CRF18.mkv | |
# -framerate 30 -> 30fps; higher the frame rate ~ faster the action in timelapse | |
# -pattern_type glob -i '*.JPG' -> set the pattern type of the input file(s) to glob; single quotes in the file pattern | |
# so as to prevent the shell from expanding the glob pattern BEFORE ffmpeg ever gets it. | |
# Doing this: -i *.JPG will ruin the project. Doing this: -i '*.JPG' without pattern type set to glob will make ffmpeg | |
# complain about not finding the file. | |
# -s hd1080 -> 1080p video; other available ones: hd720, hd480 | |
# -c:v libx264 -> use the libx264 library (developed by VideoLAN - the same group that developed VLC) | |
# -crf 18 -> set constant rate factor to 18. 0-51 is the possible range, 18-28 is the good range. | |
# 18 makes the video's bit rate same as the input | |
# 0 is lossless and 51 is the worst possible | |
# skipping the -crf part is also advisable | |
# For reverse timelapse: | |
cat $(ls -r *jpg) | ffmpeg -f image2pipe -framerate 30 -i - -s hd1080 -c:v libx264 -crf 18 30fps_1080p_CRF18_REVERSED.mkv | |
# -f image2pipe : tells ffmpeg about the type of input it is going to get, kinda' | |
# -i - : tells ffmpeg to get input from stdin | |
# Helpful Links: | |
# https://en.wikibooks.org/wiki/FFMPEG_An_Intermediate_Guide/image_sequence |
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