[数值计算] 请问 BAT 如何获取mp4文件的帧数和帧率并赋值给变量？

ffprobe -v error -select_streams v:0 -count_packets -show_entries stream=nb_read_packets -of csv=p=0 1.mp4
复制代码

mediainfo --Output="Video;%FrameCount%" 1.mp4
复制代码

ffmpeg -i 1.mp4 -map 0:v:0 -c copy -f null - 2>&1 | findstr "^frame="
复制代码

@echo off
for /f "tokens=2" %%i in ('ffmpeg -i 1.mp4 -map 0:v:0 -c copy -f null - 2^>^&1 ^| findstr /b "frame="') do (
    set "FrameCount=%%i"
)
echo %FrameCount%
pause
复制代码

@echo off
for /f %%i in ('ffprobe -v error -select_streams v:0 -count_packets -show_entries stream^=nb_read_packets -of csv^=p^=0 1.mp4') do (
    set "FrameCount=%%i"
)
echo %FrameCount%
pause
复制代码

@echo off
for /f %%i in ('mediainfo --Output^="Video;%%FrameCount%%" 1.mp4') do (
    set "Frame_Count=%%i"
)
echo %Frame_Count%
pause
复制代码

ffprobe -v error -select_streams v -of default=noprint_wrappers=1:nokey=1 -show_entries stream=r_frame_rate file.mp4
复制代码

@echo off
for /f %%i in ('ffprobe -v error -select_streams v:0 -count_packets -show_entries stream^=nb_read_packets -of csv^=p^=0 1.mp4') do (
    set "FrameCount=%%i"
)
echo %FrameCount%
for /f %%j in ('ffprobe -v error -select_streams v -of default=noprint_wrappers=1:nokey=1 -show_entries stream=r_frame_rate 1.mp4') do (
    set "b=%%j"
)
echo %b%
pause
复制代码

ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 input.mp4
复制代码

@echo off
for /f %%i in ('ffprobe -v error -show_entries format^=duration -of default^=noprint_wrappers^=1:nokey^=1 1.mp4') do (
    set "c=%%i"
)
echo %c%
pause
复制代码