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yoya/ffmerge.sh

Last active July 31, 2024 18:17
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ffmerge.sh
#! /bin/bash
set -euo pipefail
if [ $# -ne 3 ]; then
echo "Usage: ffmerge.sh input.mp4 input.wav output.mp4"
exit 1;
fi
iv="$1" ; ia="$2" ; o="$3"
# ref) https://stackoverflow.com/questions/2869281/how-to-determine-video-codec-of-a-file-with-ffmpeg
cv=`ffprobe -v error -select_streams v:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 "$iv"`
ca=`ffprobe -v error -select_streams a:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 "$ia"`
ev="h264" ; ea="aac"
if [[ "$cv" =~ "$ev" ]]; then
ev="copy"
fi
if [[ "$ca" =~ "$ea" ]]; then
ea="copy"
fi
echo "cvodec:$cv=>$ev" "caodec:$ca=>$ea"
ffmpeg -loglevel 24 -i "$iv" -i "$ia" -c:v "$ev" -c:a "$ea" \
-map 0:v:0 -map 1:a:0 "$o" -progress pipe:1 | \
awk '{ if ($1 ~ /^frame/) { printf "*" ; fflush() } }' ;
echo ;
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