Merge branch 'feature/ffmpeg-script' into develop

* feature/ffmpeg-script:
  Added thumbnail script
  Added duration script
  Added hls script

app/encoding/duration.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+# Duration
+ffmpeg -i $1.mp4 2>&1 | grep 'Duration' | cut -d ' ' -f 4 | sed s/,//

app/encoding/hls_h264.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+echo "encoding start " $1
+mkdir $1
+ffmpeg -hide_banner -y -i $1.mp4 \
+  -vf scale=w=640:h=360:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod  -b:v 800k -maxrate 856k -bufsize 1200k -b:a 96k -hls_segment_filename $1/360p_%03d.ts $1/360p.m3u8 \
+  -vf scale=w=842:h=480:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 1400k -maxrate 1498k -bufsize 2100k -b:a 128k -hls_segment_filename $1/480p_%03d.ts $1/480p.m3u8 \
+  -vf scale=w=1280:h=720:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 2800k -maxrate 2996k -bufsize 4200k -b:a 128k -hls_segment_filename $1/720p_%03d.ts $1/720p.m3u8 \
+  -vf scale=w=1920:h=1080:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 5000k -maxrate 5350k -bufsize 7500k -b:a 192k -hls_segment_filename $1/1080p_%03d.ts $1/1080p.m3u8
+echo "encoding done" $1

app/encoding/thumbnail.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+# thumbnail
+#encoding -i $1.mp4 -s 400x222 -ss 00:00:14.435 -vframes 1 out.png
+ffmepg -i $1.mp4 -r 0.5 -f image2 output_%05d.jpg
+