add notes

audio/editing-notes

@@ -0,0 +1,11 @@
+make low-bitrate preview for finding cutpoints:
+ffmpeg -i src.m4a -acodec libvo_aacenc -ac 1 -ab 8k tmp.m4a
+
+convert to Matroska for faster editing:
+mkvmerge -o tmp.mka --split "timecodes:0:12:34,1:23:45,..." src.m4a
+
+merge cuts (we want the even-numbered files):
+mkvmerge -o tmp.mka `ls tmp-*[02468].mka | sed "s/^/+/;s/+\(.*\)-002.mka/\1-002.mka/"`
+
+put back into .m4a:
+mkvextract tracks tmp.mka 1:tmp.aac && MP4Box -add tmp.aac dest.m4a