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Scale videos to same size and use a constant framerate in the filter_complex command. Also, use that rate as the final output rate. Was finding slippage of the mattes with mixes of 24 and 30 fps videos.

This commit is contained in:
mmcwilliams 2019-05-31 17:29:44 -04:00
parent 61bb4be1f3
commit f19647472d
2 changed files with 14 additions and 12 deletions
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4
README.md
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@ -22,4 +22,6 @@ This command will take video `A.mp4` and `B.mp4` as image sources while using `m
This script started as a multi-command experiment that finally got reduced to a single command that leans heavily on ffmpeg's `maskmerge` filter: [Documentation](https://ffmpeg.org/ffmpeg-filters.html#maskedmerge)
Uses 1280x720 resolution and Apple ProRes 422 HQ as the output format, right now but change that easily in the script. Check it out!
Uses 1280x720 resolution and Apple ProRes 422 HQ as the output format, right now but change that easily in the script.
Videos at different framerates will cause "slippage" between the mattes and the images, so it's best to standardize those before running this script. The default rate is set to 24fps because it's been the lowest common denominator of the videos this was written for, but you should use a consistent framerate with all videos passed into this script.

22
bipack.sh
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@ -1,29 +1,29 @@
#!/bin/bash
#IMAGE1
A=${1}
#IMAGE2
B=${2}
#MATTE
MATTE=${3}
#OUTPUT FILE
OUTPUT_FILE=${4}
CONTRAST=100
SIZE="1280x720"
RATE=30
W=1280
H=720
RATE=24
time ffmpeg -y -i $A -i $B -i $MATTE \
-filter_complex "
color=0x000000:size=$SIZE, format=rgb24[bla];
[0] format=rgb24 [a];
[1] format=rgb24 [b];
[2] format=gray, smartblur=1, eq=contrast=$CONTRAST, format=rgb24 [maska];
[2] format=gray, smartblur=1, eq=contrast=$CONTRAST, negate, format=rgb24 [maskb];
color=0x000000:size=${W}x${H}, format=rgb24[bla];
[0] fps=${RATE},scale=${W}:${H}:force_original_aspect_ratio=decrease,format=rgb24 [a];
[1] fps=${RATE},scale=${W}:${H}:force_original_aspect_ratio=decrease,format=rgb24 [b];
[2] fps=${RATE},scale=${W}:${H}:force_original_aspect_ratio=decrease,format=gray,
smartblur=1, eq=contrast=$CONTRAST, format=rgb24 [maska];
[2] fps=${RATE},scale=${W}:${H}:force_original_aspect_ratio=decrease,format=gray,
smartblur=1, eq=contrast=$CONTRAST, negate, format=rgb24 [maskb];
[bla][a][maska] maskedmerge, format=rgb24 [pass1];
[pass1][b][maskb] maskedmerge, format=rgb24
" \
-r $RATE \
-c:v prores_ks \
-shortest \
-profile:v 3 \
$OUTPUT_FILE