mirror of https://github.com/captn3m0/Scripts.git
29 lines
595 B
Bash
Executable File
29 lines
595 B
Bash
Executable File
#!/bin/bash
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# http://redsymbol.net/articles/unofficial-bash-strict-mode/
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set -euo pipefail
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# Source: https://rentry.co/n4ost
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f="$1"
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t=$(mktemp)
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mp4extract-bento4 moov/trak/mdia/minf/stbl/stsd/mp4a/esds \
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"$f" /dev/stdout | xxd -p | tr -d '\n' > $t
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magic=$(sed -re 's/^.*0580808002(....).*$/\1/' $t)
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if [ "$magic" != "1212" ]; then
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rm "$t"
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exit 0
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fi
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t2=`mktemp`
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new=$(sed -re 's/05808080021212/05808080021210/' $t | xxd -r -p >$t2)
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rm $t
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old="${f}.pre-fix"
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mv -v "$f" "$old"
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mp4edit --replace \
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moov/trak/mdia/minf/stbl/stsd/mp4a/esds:"$t2" \
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"$old" \
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"$f"
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rm "$old" |