FFmpeg腳本

1.將當前目錄下的flv視頻文件轉換爲mp4格式，並刪除原文件

#! usr/bin/env bash

for file in $(ls *flv)
do
    ffmpeg -i $file -c copy ${file%.flv*}.mp4
#   echo ${file%.mp4*}
done

rm -rf *flv

2.將原視頻加速爲2倍速

ffmpeg -i input.mp4 -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" output.mp4

copy

-filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" -b:v 

3.將本目錄下的所有mp4文件加速爲2倍速

#! usr/bin/env bash

for file in $(ls *mp4)
do
    ffmpeg -i $file -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" ${file%.mp4*}.mp4
#   echo ${file%.mp4*}
done

4.將本目錄下的所有mp4文件加速爲2倍速並設置爲固定碼率

#! usr/bin/env bash

for file in $(ls *mp4)
do
    ffmpeg -i $file -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" -b:v 1500k ${file%.mp4*}.mp4
#   echo ${file%.mp4*}
done