encode.sh

#!/bin/sh
INPUT="$1"
TMP=`echo $INPUT | cut -f3 -d "/"`
LEN=`expr ${#TMP} - 5`
FILENAME=`echo $TMP | cut -c 1-$LEN`
TMPOUT="./video/tmp/$FILENAME.mp4"
OUTPUT="./video/encoded/$FILENAME.mp4"

TARGET_HEIGHT="720"

## mediainfo
echo "check media info..."
MEDIA_INFO=`mediainfo --Inform='Video;%FrameRate%,%DisplayAspectRatio/String%,%BitRate%,%Width%,%Height%' "$1"`
FPS=`echo ${MEDIA_INFO} | awk -F',' '{print $1}'`
ASPECT_RATIO=`echo ${MEDIA_INFO} | awk -F',' '{print $2}'`
BIT_RATE=`echo ${MEDIA_INFO} | awk -F',' '{print $3}'`
SOURCE_WIDTH=`echo ${MEDIA_INFO} | awk -F',' '{print $4}'`
SOURCE_HEIGHT=`echo ${MEDIA_INFO} | awk -F',' '{print $5}'`

echo "source info       -----------------"
echo "  fps         : ${FPS}fps"
echo "  bit rate    : ${BIT_RATE}bps"
echo "  aspect ratio: ${ASPECT_RATIO}"
echo "  width       : ${SOURCE_WIDTH}px"
echo "  height      : ${SOURCE_HEIGHT}px"

## calc convert setting
TARGET_SCALE=`echo "scale=2; ${SOURCE_HEIGHT} / ${TARGET_HEIGHT}" | bc`
TARGET_WIDTH=`echo "scale=0; ${SOURCE_WIDTH} / ${TARGET_SCALE}" | bc`
TARGET_BIT_RATE=`echo "scale=0; ${BIT_RATE} / (${TARGET_SCALE} * 2)" | bc`
echo "convert settings  ------------------"
echo "  scale       : ${TARGET_SCALE}"
echo "  width       : ${TARGET_WIDTH}px"
echo "  height      : ${TARGET_HEIGHT}px"
echo "  bitrate     : ${TARGET_BIT_RATE}"

## encode start
echo "encode start  ------------------"

gst-launch-1.0 \
    filesrc location="${INPUT}" \
    ! progressreport \
    ! tsdemux name=demuxer demuxer. \
    ! queue \
    ! aacparse \
    ! avdec_aac \
    ! audioresample \
    ! audioconvert dithering=0 \
    ! voaacenc bitrate=192000 \
    ! mux. mp4mux  name=mux \
    ! filesink location="${TMPOUT}" demuxer. \
    ! queue \
    ! mpegvideoparse \
    ! omxmpeg2videodec \
    ! videoconvert \
    ! deinterlace \
    ! omxh264enc target-bitrate=${TARGET_BIT_RATE} control-rate=variable \
    ! video/x-h264,width=${TARGET_WIDTH},height=${TARGET_HEIGHT}, \
      stream-format=byte-stream,profile=high \
    ! h264parse \
    ! mux.

status=$?
echo "encode exit"
mv $TMPOUT $OUTPUT
exit $status