Bombe: Print progress while cutting columns.

2012-11-04T22:02:51Z

Print progress while cutting columns.

Bombe: Created page

2012-11-04T21:49:19Z

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First get the width, length and framerate of the movie you want to create a moviegram of:

# mediainfo -f movie.avi | grep '$Width\|Frame \(rate\|count$\)'

Find out the ratio at which to play the movie:

# echo '3 k ''<fps>'' ''<number of frames>'' ''<movie width>'' / / p' | dc

This will probably result in a number smaller than <code>1.0</code>.

Now cut the single frames out of the movie:

# avconv -i movie.avi -vsync 1 -r ''rate'' image-%04.pnm

Cut a single column from all those frames:

# for i in `seq 1 ''width''`; do f="$(seq -f %04g $i $i)"; pamcut -left "$(($i- 1))" -width 1 < "image-${f}.pnm" > "col-${f}.pnm"; done

Combine all the columns into a single image:

# pnmcat -lr col-0*.pnm > part-1.pnm # pnmcat can only open 1024 files at once so we have to process it in smaller batches
# pnmcat -lr col-1*.pnm > part-2.pnm
# pnmcat -lr part-*.pnm | pnmtopng > moviegram.png

@@ Line 15: / Line 15: @@
 Cut a single column from all those frames:
-  # for i in `seq 1 ''width''`; do f="$(seq -f %04g $i $i)"; pamcut -left "$(($i- 1))" -width 1 < "image-${f}.pnm" > "col-${f}.pnm"; done
+  # for i in `seq 1 ''width''`; do f="$(seq -f %04g $i $i)"; echo $f; pamcut -left "$(($i- 1))" -width 1 < "image-${f}.pnm" > "col-${f}.pnm"; done
 Combine all the columns into a single image:

Creating Moviegrams - Revision history

Bombe: Print progress while cutting columns.

Bombe: Created page