Prefix filenames for ffmpeg/ffprobe with file:, and tell when - is not supported1.0.2

Signed-off-by: Mattias Andrée <m@maandree.se>

1 files changed, 19 insertions, 2 deletions

diff --git a/ffextract-audio b/ffextract-audio
index f72425f..7af0f43 100755
--- a/ffextract-audio
+++ b/ffextract-audio
@@ -42,10 +42,23 @@ if test $# = 2; then
 	if test -z "${out_file}"; then
 		usage
 	fi
+	if test "${out_file}" = -; then
+		printf '%s: - is not supported for out-file\n' "$0" >&2
+		exit 1
+	fi
+else
+	if test "${in_file}" = -; then
+		printf '%s: out-file must be specified if in-file is -\n' "$0" >&2
+		exit 1
+	fi
 fi
 
 getext () {
-	ffprobe -v error -select_streams a:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 -- "$1"
+	probed_file="$1"
+	if test ! "${probed_file}" -; then
+		probed_file="file:${probed_file}"
+	fi
+	ffprobe -v error -select_streams a:0 -show_entries stream=codec_name -of default=noprint_wrappers=1:nokey=1 -- "${probed_file}"
 }
 
 removeext () {
@@ -55,7 +68,11 @@ removeext () {
 extract () {
 	printf '\033[1m%s\033[m\n' "Extracting audio track from ${1}" >&2
 	printf '\033[1m%s\033[m\n' "and storing as ${2}" >&2
-	if ffmpeg -i "${1}" -vn -acodec copy ${ffmpeg_flag_y} -- "${2}"; then
+	in_file_prefixed="${1}"
+	if test ! "${in_file_prefixed}" -; then
+		in_file_prefixed="file:${in_file_prefixed}"
+	fi
+	if ffmpeg -i "${in_file_prefixed}" -vn -acodec copy ${ffmpeg_flag_y} -- "file:${2}"; then
 		if test ${delete_in_file} = yes; then
 			unlink -- "${1}"
 		fi