1.将当前目录下的flv视频文件转换为mp4格式，并删除原文件
#! 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.将原视频加速为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
视频详细信息
ffprobe -i
windows硬件加速1
ffmpeg -c:v h264_qsv -i
windows硬件2倍速加速
-filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" -c:v h264_qsv -b:v
windows硬件4倍速加速
-filter_complex "[0:v]setpts=0.25*PTS[v];[0:a]atempo=4.0[a]" -map "[v]" -map "[a]" -c:v h264_qsv -b:v
k
3.将本目录下的所有mp4文件加速为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.将本目录下的所有mp4文件加速为2倍速并设置为固定码率
#! 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
