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spike silencedetect overlap

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Bel LaPointe
2023-12-26 08:29:08 -05:00
parent 500a115bd1
commit e2fb125834
2 changed files with 32 additions and 12 deletions
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36
src-lib/testdata/poc.sh vendored
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@@ -1,15 +1,24 @@
#! /bin/bash #! /bin/bash
py="$(cat <<EOF py="$(cat <<EOF
from sys import stdin; lines = [i.strip() for i in stdin.readlines()]; from sys import stdin, stderr
def keyword(line): lines = [i.strip() for i in stdin.readlines()]
return "keep" if "keep" in line else "drop"
somelines = lines[:1] def frame_duplicate_status(line):
for i in range(1, len(lines)): return "keep" if "keep" in line else "drop", "Parsed_mpdecimate_0" in line
if keyword(somelines[-1]) != keyword(lines[i]): somelines = []
somelines.append(lines[i-1]) for i in range(len(lines)):
status, relevant = frame_duplicate_status(lines[i])
if not relevant:
continue
if not somelines:
somelines.append(lines[i]) somelines.append(lines[i])
somelines = [(keyword(i), i.split("pts_time:")[1].split()[0]) for i in somelines] else:
prev_status, _ = frame_duplicate_status(somelines[-1])
if status != prev_status:
somelines.append(lines[i-1])
somelines.append(lines[i])
somelines = [(frame_duplicate_status(i)[0], i.split("pts_time:")[1].split()[0]) for i in somelines]
# just the keeps # just the keeps
somelines = [i for i in somelines[2:] if i[0] == "keep"] somelines = [i for i in somelines[2:] if i[0] == "keep"]
@@ -46,10 +55,13 @@ EOF
d=$(mktemp -d) d=$(mktemp -d)
echo d=$d >&2 echo d=$d >&2
for span in $( for span in $(
ffmpeg -i $f -vf mpdecimate -loglevel debug -f null - 2>&1 \ (
| grep Parsed_mpdecimate_0 \ ffmpeg -i $f -vf mpdecimate -af silencedetect=n=-50dB:d=1 -loglevel debug -f null -
| grep -E ' (keep|drop) ' \ #ffmpeg -i "$f" -af silencedetect=n=-50dB:d=1 -loglevel debug -f null -
| python3 -c "$py" ) 2>&1 \
| grep -E 'silencedetect|Parsed_mpdecimate_0|Duration: *[0-9]' \
| grep -E 'silencedetect| (keep|drop) |Duration: *[0-9]' \
| python3 -c "$py" >&2
); do ); do
n=$((n+1)) n=$((n+1))
ffmpeg -y -ss ${span%,*} -i "$f" -t ${span#*,} "$d/$(printf "%05d" $(ls "$d" | wc -l)).${f##*.}" ffmpeg -y -ss ${span%,*} -i "$f" -t ${span#*,} "$d/$(printf "%05d" $(ls "$d" | wc -l)).${f##*.}"

8
src-lib/testdata/stackoverflow.sh vendored
View File

@@ -37,3 +37,11 @@ echo 'ffmpeg -y -i "$f" -filter:v "select='gt(scene,0.50)',showinfo" -f null - 2
# ffmpeg -i input.mp4 -vf mpdecimate,setpts=N/FRAME_RATE/TB out.mp4 # ffmpeg -i input.mp4 -vf mpdecimate,setpts=N/FRAME_RATE/TB out.mp4
# ffmpeg -i "$f" -vf "split=2[full][crop];[crop]mpdecimate=hi=16:lo=16:frac=1:max=1000[crop];[crop][full]overlay" "$g" # ffmpeg -i "$f" -vf "split=2[full][crop];[crop]mpdecimate=hi=16:lo=16:frac=1:max=1000[crop];[crop][full]overlay" "$g"
ffmpeg -y -i "$f" -vf "split=2[full][crop];[crop]mpdecimate,setpts=N/FRAME_RATE/TB[crop];[crop][full]overlay" "$g" ffmpeg -y -i "$f" -vf "split=2[full][crop];[crop]mpdecimate,setpts=N/FRAME_RATE/TB[crop];[crop][full]overlay" "$g"
# https://stackoverflow.com/questions/25697596/using-ffmpeg-with-silencedetect-to-remove-audio-silence
# [silencedetect @ 0000000004970f80] silence_start: -0.00154195
# [silencedetect @ 0000000004970f80] silence_end: 3.20435 | silence_duration: 3.2059
# ...
# [silencedetect @ 0000000004970f80] silence_start: 343.84
ffmpeg -i "$f" -af silencedetect=n=-50dB:d=1 -f null - 2>&1 | grep silencedetect