Oct 07
哦，原来视频流式传输需要这么优化：
Optimizing MP4 Video for Fast Streaming
Tools to fix MP4 videos so players can start playback instantly (without downloading the whole file)
Understanding the M.P.E.G-4 moov atom: Pseudo-Streaming in Mp4
检测视频文件是否已经为流式传输优化：
mp4box -info A.mp4 2>&1 1>NUL | find "File suitable for progressive download (moov before mdat)" #或者 AtomicParsley input.mp4 -T | sed -n 2p | grep -q "moov" && echo "yup" || echo "nope"
那么就撸个批处理干，支持 mp4/mkv/mov/m4v 格式的优化。
#!/bin/bash
[ -n "$1" ] && {
src_folder="$1"
} || {
echo "input you source folder location."
exit
}
src_empty=$(ls -A "$src_folder")
[ -n "$src_empty" ] && {
for file_a in ${src_folder}/*
do
in_full_filename=$(basename "$file_a")
in_filename="${filename%.*}"
in_extension="${file_a##*.}"
out_full_filename="${in_filename}_.${in_extension}"
echo "src=$in_full_filename ndst=$out_full_filename"
case $in_extension in
mp4|mov|m4v)
ffmpeg -i "${src_folder}/${in_full_filename}" -movflags faststart -acodec copy -vcodec copy -copyts "${src_folder}/$out_full_filename"
;;
mkv)
ffmpeg -i "${src_folder}/${in_full_filename}" -c copy -reserve_index_space 100k -copyts "${src_folder}/$out_full_filename"
;;
*)
echo "${in_extension} file not support faster start."
;;
esac
[ $? -eq 0 ] && {
rm -f "${src_folder}/${in_full_filename}"
mv -f "${src_folder}/$out_full_filename" "${src_folder}/${in_full_filename}"
echo "-----------${in_filename} now faster web loading------------"
} || {
echo "-----------${in_filename} faster process failed------------"
}
done
} || {
echo "Source folder is empty."
}
Windows 版本，丢到要处理的视频目录下：
for /r %%F in (*.mp4) do (
ffmpeg.exe -i "%%F" -movflags faststart -acodec copy -vcodec copy -copyts "%%~dpnF"_.mp4
if not errorlevel 1 if exist "%%~dpnF.mp4" (
del /q "%%F"
move "%%~dpnF"_.mp4 "%%F"
)
)
for /r %%F in (*.mov) do (
ffmpeg.exe -i "%%F" -movflags faststart -acodec copy -vcodec copy -copyts "%%~dpnF"_.mov
if not errorlevel 1 if exist "%%~dpnF.mov" (
del /q "%%F"
move "%%~dpnF"_.mov "%%F"
)
)
for /r %%F in (*.mkv) do (
ffmpeg.exe -i "%%F" -c copy -reserve_index_space 100k -copyts "%%~dpnF"_.mkv
if not errorlevel 1 if exist "%%~dpnF.mkv" (
del /q "%%F"
move "%%~dpnF"_.mkv "%%F"
)
)
for /r %%F in (*.wmv) do (
ffmpeg.exe -i "%%F" -movflags faststart -copyts "%%~dpnF".mp4
if not errorlevel 1 if exist "%%~dpnF.wmv" (
del /q "%%F"
)
)
for /r %%F in (*.mpg) do (
ffmpeg.exe -i "%%F" -movflags faststart -copyts "%%~dpnF".mp4
if not errorlevel 1 if exist "%%~dpnF.mpg" (
del /q "%%F"
)
)
for /r %%F in (*.flv) do (
ffmpeg.exe -i "%%F" -movflags faststart -copyts "%%~dpnF".mp4
if not errorlevel 1 if exist "%%~dpnF.flv" (
del /q "%%F"
)
)
for /r %%F in (*.rmvb) do (
ffmpeg.exe -i "%%F" -movflags faststart -copyts "%%~dpnF".mp4
if not errorlevel 1 if exist "%%~dpnF.rmvb" (
del /q "%%F"
)
)
for /r %%F in (*.rm) do (
ffmpeg.exe -i "%%F" -movflags faststart -copyts "%%~dpnF".mp4
if not errorlevel 1 if exist "%%~dpnF.rm" (
del /q "%%F"
)
)
