fix-pal-speedup - no more streaming, it causes problems

[transcoding] / fix-pal-speedup

diff --git a/fix-pal-speedup b/fix-pal-speedup
index 39c4ba4cbcbc5d2e46a73caffd9be3d41a1bda68..67397c09a742f5d7c32d282a4ebc99ffd746bafa 100755 (executable)
--- a/fix-pal-speedup
+++ b/fix-pal-speedup
@@ -15,52 +15,59 @@ FORCEFPS="24"
 SLOWDOWN="0.96"
 
 function mux_replace_audio {
-    infile="$1"
-    audiofile="$2"
-    outfile="$3"
+    local infile="$1"
+    local audiofile="$2"
+    local outfile="$3"
 
-    trackid="$(mkvmerge -i "$infile" | grep video | sed 's/^Track ID \(.\):.*$/\1/')"
+    local trackid="$(mkvmerge -i "$infile" | grep 'Track ID.*video' | sed 's/^Track ID \(.\):.*$/\1/')"
     mkvmerge -o "${outfile}" --default-duration "${trackid}:${FORCEFPS}fps" --no-audio "$infile" "$audiofile"
 }
 
 function extract_audio {
-    infile="$1"
+    local infile="$1"
+    local outfile="$2"
 
-    exec mpv \
+    mpv \
         --no-terminal \
         --no-video \
-        --ao pcm:waveheader:file=/dev/stdout \
+        --ao "pcm:waveheader:file=${outfile}" \
         "$infile"
 }
 
 function slow_audio {
-    exec sox \
+    local infile="$1"
+    local outfile="$2"
+
+    sox \
         --temp "$tmpdir" \
-        - \
-        -t wav - \
+        "$infile" \
+        -t wav \
+        "$outfile" \
         speed "${SLOWDOWN}" \
         gain -n \
         channels 2
 }
 
 function encode_audio {
-    outfile="$1"
-    exec lame \
+    local infile="$1"
+    local outfile="$2"
+
+    lame \
         --preset standard \
-        - \
-        "${outfile}"
+        "${infile}" "${outfile}"
 }
 
 function convert_file {
-    infile="$1"
-    outfile="$2"
-    tmpdir="$(mktemp -d "${TMPDIR:-/var/tmp}/pal-XXXXXXXX")"
-    audiofile="${tmpdir}/audio.mp3"
-
-    extract_audio "${infile}" | slow_audio | encode_audio "${audiofile}"
-    mux_replace_audio "${infile}" "${audiofile}" "${outfile}"
-
-    rm -rf "$tmpdir"
+    local infile="$1"
+    local outfile="$2"
+    local audio1="${tmpdir}/audio1.wav"
+    local audio2="${tmpdir}/audio2.wav"
+    local audio3="${tmpdir}/audio3.mp3"
+
+    extract_audio "${infile}" "${audio1}"
+    slow_audio "${audio1}" "${audio2}"
+    encode_audio "${audio2}" "${audio3}"
+    mux_replace_audio "${infile}" "${audio3}" "${outfile}"
 }
 
 
@@ -75,6 +82,8 @@ for infile in "$@"; do
         continue
     fi
 
+    tmpdir="$(mktemp -d "${TMPDIR:-/var/tmp}/pal-XXXXXXXX")"
     convert_file "$infile" "$outfile"
+    rm -rf "$tmpdir"
 done