Differences between revisions 8 and 21 (spanning 13 versions)
⇤ ← Revision 8 as of 2012-10-05 06:26:26 →
Size: 1524
Editor: SamatJain
Comment: Use nproc to determine no. of CPUs; increase arguments per execution
← Revision 21 as of 2017-04-14 09:43:49 → ⇥
Size: 3614
Editor: SamatJain
Comment:
Deletions are marked like this. Additions are marked like this.
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find . -name '*JPG' -print0 | xargs -0 -P2 -n32 mogrify -crop 3840x2880+0+720 -resize 1920x1080 find . -name '*JPG' -print0 | xargs -0 -P$(nproc) -n256 mogrify -crop 3840x2880+0+720 -resize 1920x1080
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For the Xiaomi Yi:

{{{#!highlight sh
# 16 MP
# Crop top
find . -name '*jpg' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -chop 0x864 -resize 1920x1080
# Crop top at 4K
find . -name '*jpg' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -chop 0x864 -resize 3840x2160

# 13 MP
# Crop top
find . -name '*jpg' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -chop 0x774 -resize 1920x1080
# Crop top at 4K
find . -name '*jpg' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -chop 0x774 -resize 3840x2160

# Xiaomi Yi 4K
# 8M (native 4K mode)
find . -name '*jpg' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -resize 1920x1080
}}}

For A6500:

{{{
# Crop bottom, use high-quality resizing
find . -name '*JPG' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -gravity South -chop 0x625 -resize 3840x2160 -filter Lanczos -unsharp
}}}
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parallel -u 'echo {}; ~/sys/tonemap/tonemapping ~/sys/tonemap/default.tnp {} {}.tonemapped && mv {}.tonemapped {}' ::: *.JPG parallel -u 'echo {}; ~/sys/tonemap/tonemapping ~/sys/tonemap/default.tnp {} {}.tonemapped && mv {}.tonemapped {}' ::: *.jpg
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for i in $(ls); do (cd $i; parallel -u 'echo {}; ~/sys/tonemap/tonemapping ~/sys/tonemap/default.tnp {} {}.tonemapped && mv {}.tonemapped {}' ::: *.JPG); done; for i in $(ls); do (cd $i; parallel -u 'echo {}; ~/sys/tonemap/tonemapping ~/sys/tonemap/default.tnp {} {}.tonemapped && mv {}.tonemapped {}' ::: *.jpg); done;
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== Encode to WebM == == Encode to video (WebM, MP4) ==
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# Old mencoder line
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# New MPV line, for VP9
# qmax appears to set video quality… lower number (e.g. qmax=25) is better quality, higher number (default is qmax=63) is less quality
mpv mf://*.jpg -mf-fps=15 -mf-type=jpeg --ovc=libvpx-vp9 -ovcopts qmax=30,threads=$(nproc) -o $(basename $(pwd)).vp9.webm

# MPV for x264
mpv mf://*.jpg -mf-fps=15 -mf-type=jpeg --ovc=libx264 --ovcopts threads=$(nproc) -o $(basename $(pwd)).mp4
# MPV for lossless x264
mpv mf://*.jpg -mf-fps=15 -mf-type=jpeg --ovc=libx264 --ovcopts preset=veryslow,qp=0,threads=$(nproc) -o $(basename $(pwd)).lossless.mp4
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See https://github.com/Argon-/mpv-config/blob/master/encoding-profiles.conf for more mpv encoding profiles.
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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; # use one of the commands from above
COMMAND='' # make sure to use single quotes
for i in $(ls); do (echo cd $i; echo $COMMAND; echo cd ../); done
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== Merge files ==

After placing all the WebM files in one directory, merge with:

{{{#!highlight sh numbers=off
f() { args=("$1"); shift; args+=("${@/#/+ }"); echo "${args[@]}"; }; echo mkvmerge $(f $(ls *webm))
}}}

or for MP4:

{{{#!highlight sh numbers=off
echo -n MP4Box ""; for i in $(ls *mp4); do echo -n -cat $i "" ; done; echo -new out.mp4
}}}

== Interesting links ==

Open-source implementation of Microsoft's HyperLapse: [[https://github.com/willcrichton/hyperlapse|willcrichton/hyperlapse: Open-source implementation of MSR Hyperlapse]]

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

   1 # Crop top
   2 find . -name '*JPG' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -chop 0x486 -resize 1920x1080
   3 # or Crop bottom
   4 find . -name '*JPG' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -gravity South -chop 0x486 -resize 1920x1080

For the GoPro HD Hero 2: 

   1 # Crop top
   2 find . -name '*JPG' -print0 | xargs -0 -P$(nproc) -n256 mogrify -crop 3840x2880+0+720 -resize 1920x1080

For the Xiaomi Yi: 

   1 # 16 MP
   2 # Crop top
   3 find . -name '*jpg' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -chop 0x864 -resize 1920x1080
   4 # Crop top at 4K
   5 find . -name '*jpg' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -chop 0x864 -resize 3840x2160
   6 
   7 # 13 MP
   8 # Crop top
   9 find . -name '*jpg' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -chop 0x774 -resize 1920x1080
  10 # Crop top at 4K
  11 find . -name '*jpg' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -chop 0x774 -resize 3840x2160
  12 
  13 # Xiaomi Yi 4K
  14 # 8M (native 4K mode)
  15 find . -name '*jpg' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -resize 1920x1080

For A6500: 

# Crop bottom, use high-quality resizing
find . -name '*JPG' -print0 | xargs -0 -P$(nproc) -n256 gm mogrify -gravity South -chop 0x625 -resize 3840x2160 -filter Lanczos -unsharp

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 video (WebM, MP4)

# Old mencoder line
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

# New MPV line, for VP9
# qmax appears to set video quality… lower number (e.g. qmax=25) is better quality, higher number (default is qmax=63) is less quality
mpv mf://*.jpg -mf-fps=15 -mf-type=jpeg --ovc=libvpx-vp9 -ovcopts qmax=30,threads=$(nproc) -o $(basename $(pwd)).vp9.webm

# MPV for x264
mpv mf://*.jpg -mf-fps=15 -mf-type=jpeg --ovc=libx264 --ovcopts threads=$(nproc) -o $(basename $(pwd)).mp4
# MPV for lossless x264
mpv mf://*.jpg -mf-fps=15 -mf-type=jpeg --ovc=libx264 --ovcopts preset=veryslow,qp=0,threads=$(nproc) -o $(basename $(pwd)).lossless.mp4

See https://github.com/Argon-/mpv-config/blob/master/encoding-profiles.conf for more mpv encoding profiles.

batch: 

# use one of the commands from above
COMMAND='' # make sure to use single quotes
for i in $(ls); do (echo cd $i; echo $COMMAND; echo cd ../); done

Merge files

After placing all the WebM files in one directory, merge with: 

f() { args=("$1"); shift; args+=("${@/#/+ }"); echo "${args[@]}"; }; echo mkvmerge $(f $(ls *webm))

or for MP4: 

echo -n MP4Box ""; for i in $(ls *mp4); do echo -n -cat $i "" ; done; echo -new out.mp4

Open-source implementation of Microsoft's HyperLapse: willcrichton/hyperlapse: Open-source implementation of MSR Hyperlapse

SamatsWiki: GoPro (last edited 2017-04-14 09:43:49 by SamatJain)