Rotate
If the camera was recording in "upside down" mode:
parallel -u 'echo {}; jpegtran -rotate 180 -perfect -copy all -outfile {}.tran {} && mv {}.tran {}' ::: *.jpg
Resize & crop
For the GoPro HD Hero 2:
For the Xiaomi Yi:
LDR tone mapping
parallel -u 'echo {}; ~/sys/tonemap/tonemapping ~/sys/tonemap/default.tnp {} {}.tonemapped && mv {}.tonemapped {}' ::: *.JPG
batch:
for i in $(ls); do (cd $i; parallel -u 'echo {}; ~/sys/tonemap/tonemapping ~/sys/tonemap/default.tnp {} {}.tonemapped && mv {}.tonemapped {}' ::: *.JPG); done;
Encode to WebM
mencoder mf://*.JPG -mf fps=15:type=jpg -ovc lavc -oac lavc -of lavf -lavfopts format=webm -lavcopts threads=4:acodec=vorbis:vcodec=libvpx -ffourcc VP80 -o $(basename $(pwd)).webm
batch:
for i in $(ls); do (cd $i; mencoder mf://*.JPG -mf fps=15:type=jpg -ovc lavc -oac lavc -of lavf -lavfopts format=webm -lavcopts threads=4:acodec=vorbis:vcodec=libvpx -ffourcc VP80 -o $(basename $(pwd)).webm); done;
Merge WebM files
After placing all the WebM files in one directory, merge with:
f() { args=("$1"); shift; args+=("${@/#/+ }"); echo "${args[@]}"; }; echo mkvmerge $(f $(ls *webm))