四錄行車記錄器播放工具

4way_player.sh

#!/bin/sh

######## 影片路徑 (L左 R右 F前 B後)
VID_L="/run/media/lyshie/SE1/DCIM/VID_L"
VID_R="/run/media/lyshie/SE1/DCIM/VID_R"
VID_F="/run/media/lyshie/SE/DCIM/VID_F"
VID_B="/run/media/lyshie/SE/DCIM/VID_B"

######## 檔案名稱
######## /run/media/lyshie/SE/DCIM/VID_F/VID_20190616_204734.(ts|kml) => 2019-06-16 20:47:34
filename=$(basename $1 | perl -pe 's/VID_(\d{4,4})(\d{2,2})(\d{2,2})_(\d{2,2})(\d{2,2})(\d{2,2})\.(ts|kml)/$1-$2-$3 $4:$5:$6/g')
echo ${filename} # 2019-06-16 20:47:34

######## 紀錄檔案名稱
 vid_left="${VID_L}/${filename}*.ts"
vid_right="${VID_R}/${filename}*.ts"
vid_front="${VID_F}/${filename}*.ts"
 vid_back="${VID_B}/${filename}*.ts"

######## 紀錄延遲播放的時間
 delay_left="0"
delay_right="0"
delay_front="0"
 delay_back="0"

######## 五秒內的影片都視為同一時間
for i in $(seq 0 5); do
    next=$(date --date="${filename} ${i} second"     "+%Y%m%d_%H%M%S") # 五秒後
     ago=$(date --date="${filename} ${i} second ago" "+%Y%m%d_%H%M%S") # 五秒前

    #### 左鏡頭影片
    if [ -f "${VID_L}/VID_${next}.ts" ]; then
        vid_left="${VID_L}/VID_${next}.ts"             # /run/media/lyshie/SE1/DCIM/VID_L/VID_20190616_204734.ts
        delay_left=$(echo "${next}" | sed -e 's/_//g') # 20190616204734
    fi
    if [ -f "${VID_L}/VID_${ago}.ts" ]; then
        vid_left="${VID_L}/VID_${ago}.ts"
        delay_left=$(echo "${ago}" | sed -e 's/_//g')
    fi

    #### 右鏡頭影片
    if [ -f "${VID_R}/VID_${next}.ts" ]; then
        vid_right="${VID_R}/VID_${next}.ts"
        delay_right=$(echo "${next}" | sed -e 's/_//g')
    fi
    if [ -f "${VID_R}/VID_${ago}.ts" ]; then
        vid_right="${VID_R}/VID_${ago}.ts"
        delay_right=$(echo "${ago}" | sed -e 's/_//g')
    fi

    #### 前鏡頭影片
    if [ -f "${VID_F}/VID_${next}.ts" ]; then
        vid_front="${VID_F}/VID_${next}.ts"
        delay_front=$(echo "${next}" | sed -e 's/_//g')
    fi
    if [ -f "${VID_F}/VID_${ago}.ts" ]; then
        vid_front="${VID_F}/VID_${ago}.ts"
        delay_front=$(echo "${ago}" | sed -e 's/_//g')
    fi

    #### 後鏡頭影片
    if [ -f "${VID_B}/VID_${next}.ts" ]; then
        vid_back="${VID_B}/VID_${next}.ts"
        delay_back=$(echo "${next}" | sed -e 's/_//g')
    fi
    if [ -f "${VID_B}/VID_${ago}.ts" ]; then
        vid_back="${VID_B}/VID_${ago}.ts"
        delay_back=$(echo "${ago}" | sed -e 's/_//g')
    fi
done

######## 取得時間最早的影片，以此當基準
mini=$(echo -e "${delay_left}\n${delay_right}\n${delay_front}\n${delay_back}" | sort -n | head -n 1)

######## 計算須延遲的秒數
 delay_left=$(echo "($delay_left  - $mini) % 10" | bc)
delay_right=$(echo "($delay_right - $mini) % 10" | bc)
delay_front=$(echo "($delay_front - $mini) % 10" | bc)
 delay_back=$(echo "($delay_back  - $mini) % 10" | bc)

echo "$delay_left $delay_right $delay_front $delay_back"
#exit

######## 關閉所有播放中的影片
pkill -x mpv

######## 前鏡頭播放
( sleep $delay_front; mpv --no-border --geometry="960x500+480+0"   ${vid_front} ) &
######## 後鏡頭播放
( sleep $delay_back;  mpv --no-border --geometry="960x500+480+500" ${vid_back}  ) &
######## 左鏡頭播放
( sleep $delay_left;  mpv --no-border --geometry="480x500+0+0"     ${vid_left}  ) &
######## 右鏡頭播放
( sleep $delay_right; mpv --no-border --geometry="480x500+1440+0"  ${vid_right} ) &

join_mp4.sh

#!/bin/sh

#### Usage: ./join_mp4.sh  /run/media/user/56E7-87E2/DCIM/F/FILE190704-143*.MOV

tmpfile=$(mktemp)

for f in "$@"; do
    echo "file '${f}'" >> "${tmpfile}"
done

# ffmpeg -f concat -safe 0 -i "${tmpfile}" -vcodec copy -an -strict experimental "${tmpfile}.mp4"
ffmpeg -f concat -safe 0 -i "${tmpfile}" -vcodec copy -acodec aac -strict experimental "${tmpfile}.mp4"

unlink "${tmpfile}"

縮時影片.md

縮時影片

• 先使用 Avidemux 或 FFmpeg 去除聲音
• 使用 FFmpeg 進行縮時

$ ffmpeg -i video_no_audio.mp4 -filter:v "setpts=PTS/6" -shortest -an output.mp4