improve twmp4

1 files changed, 29 insertions, 17 deletions

diff --git a/dot/local/bin/twmp4 b/dot/local/bin/twmp4
index 9b80425..3cc3dad 100755
--- a/dot/local/bin/twmp4
+++ b/dot/local/bin/twmp4
@@ -9,26 +9,38 @@ case "$INPUT" in
     *) OUTPUT=${INPUT}.twitter.mp4 ;;
 esac
 
-# source: https://gist.github.com/nikhan/26ddd9c4e99bbf209dd7
-
 if [ ! -e "$OUTPUT" ]
 then
-    ffmpeg -i "$INPUT" -vcodec libx264 \
-        -vf 'scale=640:trunc(ow/a/2)*2' \
-        -acodec aac \
-        -vb 1024k \
-        -minrate 1024k -maxrate 1024k \
-        -bufsize 1024k -ar 44100 \
-        -strict experimental \
-        -r 30 \
-        "$OUTPUT"
+    # source: https://gist.github.com/nikhan/26ddd9c4e99bbf209dd7
+    ffmpeg -hide_banner \
+           -i "$INPUT" \
+           -vcodec libx264 \
+           -vf 'scale=640:trunc(ow/a/2)*2' \
+           -acodec aac \
+           -vb 1024k \
+           -minrate 1024k -maxrate 1024k \
+           -bufsize 1024k -ar 44100 \
+           -strict experimental \
+           -r 30 \
+           "$OUTPUT"
 fi
 
-# source: https://unix.stackexchange.com/questions/1670/how-can-i-use-ffmpeg-to-split-mpeg-video-into-10-minute-chunks/212518#212518
+video_length()
+{
+    # source: https://superuser.com/questions/650291/how-to-get-video-duration-in-seconds/945604#945604
+    ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$1"
+}
 
-CHUNKS=${OUTPUT%.mp4}.%03d.mp4
-ffmpeg -i "$OUTPUT" \
-       -c copy \
-       -map 0 \
-       -segment_time 2:15 -f segment -reset_timestamps 1 "$CHUNKS"
+chunk_seconds=135 # twitter max is 140, but ffmpeg can run over specified time
+video_length=$(video_length "$OUTPUT")
 
+if [ "${video_length%.*}" -gt "$chunk_seconds" ]
+then
+    # source: https://unix.stackexchange.com/questions/1670/how-can-i-use-ffmpeg-to-split-mpeg-video-into-10-minute-chunks/212518#212518
+    CHUNKS=${OUTPUT%.mp4}.%03d.mp4
+    ffmpeg -hide_banner \
+           -i "$OUTPUT" \
+           -c copy \
+           -map 0 \
+           -segment_time "$chunk_seconds" -f segment -reset_timestamps 1 "$CHUNKS"
+fi