json - 有没有办法用ffmpeg按章节批量拆分文件,然后在windows中用mkvmerge重新组装?
问题描述
所以我最初制作了一个批处理脚本,能够相对精确地将视频修剪成章节,而无需通过关键帧运行,但代码看起来很糟糕,我无法让它循环遍历所有 mp4 文件,也无法让 mkvmerge 附加文件将它们分开后。代码在下面,但要温柔,这是我的第一次尝试。
@echo off
setlocal enableDelayedExpansion
REM CODE BELOW CREATES JSON FILES FOR ALL MP4 FILES WITHIN THE SAME DIRECTORY
ffprobe -v quiet -print_format json -show_chapters -loglevel error "01x01.mp4" > "01x01.json"
REM CODE BELOW SETS VARIABLES FROM EACH SPECIFIC JSON
FOR /F "delims=" %%i in ('jq .chapters[2].start ^< 01x01.json') DO SET /A start1=%%i
FOR /F "delims=" %%j in ('jq .chapters[2].end ^< 01x01.json') DO SET /A end1=%%j
FOR /F "delims=" %%k in ('jq .chapters[4].start ^< 01x01.json') DO SET /A start2=%%k
FOR /F "delims=" %%l in ('jq .chapters[4].end ^< 01x01.json') DO SET /A end2=%%l
FOR /F "delims=" %%m in ('jq .chapters[6].start ^< 01x01.json') DO SET /A start3=%%m
FOR /F "delims=" %%n in ('jq .chapters[6].end ^< 01x01.json') DO SET /A end3=%%n
FOR /F "delims=" %%o in ('jq .chapters[8].start ^< 01x01.json') DO SET /A start4=%%o
FOR /F "delims=" %%p in ('jq .chapters[8].end ^< 01x01.json') DO SET /A end4=%%p
REM SETS THE DURATION OF EACH FILE TO USE PRECISION TIMING FOR START AND STOP TIMES
CALL vbs (%end1%-%start1%)/1000
SET duration1=%val%
CALL vbs (%end2%-%start2%)/1000
SET duration2=%val%
CALL vbs (%end3%-%start3%)/1000
SET duration3=%val%
CALL vbs (%end4%-%start4%)/1000
SET duration4=%val%
REM SETS THE START TIME IN SECONDS VS MILLISECONDS
CALL vbs (%start1%)/1000
SET start1=%val%
CALL vbs (%start2%)/1000
SET start2=%val%
CALL vbs (%start3%)/1000
SET start3=%val%
CALL vbs (%start4%)/1000
SET start4=%val%
REM TRIM AND SPLIT ORIGINAL FILE INTO SEPERATE SECTIONS BASED ON CHAPTER MARKERS
ffmpeg -ss %START1% -i 01x01.mp4 -ss 0 -c copy -to %DURATION1% -avoid_negative_ts make_zero 01x01-1.mp4
ffmpeg -ss %START2% -i 01x01.mp4 -ss 0 -c copy -to %DURATION2% -avoid_negative_ts make_zero 01x01-2.mp4
ffmpeg -ss %START3% -i 01x01.mp4 -ss 0 -c copy -to %DURATION3% -avoid_negative_ts make_zero 01x01-3.mp4
ffmpeg -ss %START4% -i 01x01.mp4 -ss 0 -c copy -to %DURATION4% -avoid_negative_ts make_zero 01x01-4.mp4
REM DELETES UNNEEDED JSON AFTER USE
del /s *.json
REM APPEND ALL MP4 FILES INTO COHESIVE MKV
for /d /r %%D in (*) do (
pushd %%D
set files=
for %%F in (*.mp4) do set files=!files! + ^( "%%F" ^)
if not "!files!"=="" %mkvmerge% -o "01x01-FINAL.mkv" !files:~2!
popd
)
REM DELETE UNNEEDED MP4 ORIGINALS AND SPLIT FILES
del /s *.mp4
我知道它很长,每次我尝试使用变量或循环来遍历所有文件时,它都无法读取 json 文件。我整天都在做这个,我可以按原样使用脚本,但我必须为每次迭代制作一个文件。
我也希望能够让它只拉出标记为“视频”的章节,但我还没有完全弄清楚那个。
如果有帮助,我将为算术部分添加 vbs 批处理文件以及示例 json。
@echo off
>"%temp%\VBS.vbs" echo Set fso = CreateObject("Scripting.FileSystemObject") : Wscript.echo (%*)
for /f "delims=" %%a in ('cscript /nologo "%temp%\VBS.vbs"') do set "val=%%a"
del "%temp%\VBS.vbs"
{
"chapters": [
{
"id": 0,
"time_base": "1/1000",
"start": 0,
"start_time": "0.000000",
"end": 5590,
"end_time": "5.590000",
"tags": {
"title": "Video"
}
},
{
"id": 1,
"time_base": "1/1000",
"start": 5590,
"start_time": "5.590000",
"end": 13994,
"end_time": "13.994000",
"tags": {
"title": "Advertisement"
}
},
{
"id": 2,
"time_base": "1/1000",
"start": 13994,
"start_time": "13.994000",
"end": 163964,
"end_time": "163.964000",
"tags": {
"title": "Video"
}
},
{
"id": 3,
"time_base": "1/1000",
"start": 163964,
"start_time": "163.964000",
"end": 195940,
"end_time": "195.940000",
"tags": {
"title": "Advertisement"
}
},
{
"id": 4,
"time_base": "1/1000",
"start": 195940,
"start_time": "195.940000",
"end": 547849,
"end_time": "547.849000",
"tags": {
"title": "Video"
}
},
{
"id": 5,
"time_base": "1/1000",
"start": 547849,
"start_time": "547.849000",
"end": 595850,
"end_time": "595.850000",
"tags": {
"title": "Advertisement"
}
},
{
"id": 6,
"time_base": "1/1000",
"start": 595850,
"start_time": "595.850000",
"end": 1413588,
"end_time": "1413.588000",
"tags": {
"title": "Video"
}
},
{
"id": 7,
"time_base": "1/1000",
"start": 1413588,
"start_time": "1413.588000",
"end": 1477569,
"end_time": "1477.569000",
"tags": {
"title": "Advertisement"
}
},
{
"id": 8,
"time_base": "1/1000",
"start": 1477569,
"start_time": "1477.569000",
"end": 1529696,
"end_time": "1529.696000",
"tags": {
"title": "Video"
}
}
]
}
我也尝试使用 start_time,所以我不必做额外的计算,但 jq 也不喜欢那样。
当我将 mkvmerge 放在这里时,它甚至都不会尝试运行,一旦它再次成为一个文件,我仍然需要在结尾处减少 7 秒,在前面减少 12 秒。
任何帮助将不胜感激,我知道这很多,但我似乎遇到了障碍,或者此时只是睡眠不足。
更新
这太棒了,我只需要弄清楚如何使用带空格的文件就可以了。我想我可以先运行一批,然后再用下划线替换所有空格。这可能会奏效,但如果我能提供帮助,我不想更改文件名。
@echo off
for %%i in (*.mp4) do (
FOR /F "delims=" %%A IN ('ffprobe -v quiet -print_format json -show_chapters -loglevel error "%%i" ^| xidel - -se "$json/(chapters)()[id!=0 and tags/title='Video']/concat('ffmpeg -ss ',start div 1000,' -i %%i -to ',((end - start) div 1000),' -c copy -avoid_negative_ts make_zero %%~ni-',position(),'.mp4')"') DO %%A
FOR /F "delims=" %%A IN ('xidel -s --xquery "concat('mkvmerge -o "%%~ni-FINAL.mkv" "',join(file:list(.,false(),'%%~ni-*.mp4'),'" + "'),'"')"') DO %%A
)
解决方案
如果我理解正确,您想删除“广告”-章节。
这可能完全可以用 来完成ffmpeg
,但如果没有源视频,我不能肯定地说。
无论如何,让我在xidel的帮助下为您提供一个非常优雅的拆分过程解决方案。
首先,您不必将ffprobe
's 的输出保存到 JSON 文件中。您可以将其通过管道传输到xidel
:
ffprobe -v quiet -print_format json -show_chapters -loglevel error "01x01.mp4" | xidel - -se "$json"
选择标记为“视频”的对象/章节:
ffprobe [...] | xidel - -se "$json/(chapters)()[id!=0 and tags/title='Video']"
{
"id": 2,
"time_base": "1/1000",
"start": 13994,
"start_time": "13.994000",
"end": 163964,
"end_time": "163.964000",
"tags": {
"title": "Video"
}
}
[...]
{
"id": 8,
"time_base": "1/1000",
"start": 1477569,
"start_time": "1477.569000",
"end": 1529696,
"end_time": "1529.696000",
"tags": {
"title": "Video"
}
}
(我不知道你为什么不想要第一章。如果你想要,那么只需删除 id!=0 and
。)
要计算 4 个章节的持续时间:
ffprobe [...] | xidel - -se "$json/(chapters)()[id!=0 and tags/title='Video']/round-half-to-even(end_time - start_time,3)"
#or
ffprobe [...] | xidel - -se "$json/(chapters)()[id!=0 and tags/title='Video']/((end - start) div 1000)"
149.97
351.909
817.738
52.127
使用这些值和创建ffmpeg
字符串/命令start
:
ffprobe [...] | xidel - -se "$json/(chapters)()[id!=0 and tags/title='Video']/concat('ffmpeg -ss ',start div 1000,' -i 01x01.mp4 -to ',((end - start) div 1000),' -c copy -avoid_negative_ts make_zero 01x01-',position(),'.mp4')"
ffmpeg -ss 13.994 -i 01x01.mp4 -to 149.97 -c copy -avoid_negative_ts make_zero 01x01-1.mp4
ffmpeg -ss 195.94 -i 01x01.mp4 -to 351.909 -c copy -avoid_negative_ts make_zero 01x01-2.mp4
ffmpeg -ss 595.85 -i 01x01.mp4 -to 817.738 -c copy -avoid_negative_ts make_zero 01x01-3.mp4
ffmpeg -ss 1477.569 -i 01x01.mp4 -to 52.127 -c copy -avoid_negative_ts make_zero 01x01-4.mp4
美化命令/查询:
ffprobe [...] | xidel - -se ^"^
$json/(chapters)()[id!=0 and tags/title='Video']/concat(^
'ffmpeg -ss ',^
start div 1000,^
' -i 01x01.mp4 -to ',^
((end - start) div 1000),^
' -c copy -avoid_negative_ts make_zero 01x01-',^
position(),^
'.mp4'^
)^
"
要执行这些ffmpeg
命令,只需将整个ffprobe
/xidel
命令放在FOR
-loop 中:
FOR /F "delims=" %A IN ('ffprobe [...] ^| xidel - -se "$json/(chapters)()[id!=0 and tags/title='Video']/concat('ffmpeg -ss ',start div 1000,' -i 01x01.mp4 -to ',((end - start) div 1000),' -c copy -avoid_negative_ts make_zero 01x01-',position(),'.mp4')"') DO %A
(在批处理脚本使用 %%A
中,如果 SETLOCAL ENABLEDELAYEDEXPANSION
转义感叹号; id^!=0
)
有了所有cmd
的缺点,我将再次使用它xidel
来创建mkvmerge
字符串/命令:
xidel -s -e "file:list(.,false(),'01x01-*.mp4')"
01x01-1.mp4
01x01-2.mp4
01x01-3.mp4
01x01-4.mp4
xidel -s -e "join(file:list(.,false(),'01x01-*.mp4'),' + ')"
01x01-1.mp4 + 01x01-2.mp4 + 01x01-3.mp4 + 01x01-4.mp4
xidel -s -e "concat('\"',join(file:list(.,false(),'01x01-*.mp4'),'\" + \"'),'\"')"
#or
xidel -s --xquery "concat('"',join(file:list(.,false(),'01x01-*.mp4'),'" + "'),'"')"
"01x01-1.mp4" + "01x01-2.mp4" + "01x01-3.mp4" + "01x01-4.mp4"
xidel -s --xquery "concat('mkvmerge -o "01x01-FINAL.mkv" "',join(file:list(.,false(),'01x01-*.mp4'),'" + "'),'"')"
mkvmerge -o "01x01-FINAL.mkv" "01x01-1.mp4" + "01x01-2.mp4" + "01x01-3.mp4" + "01x01-4.mp4"
要再次执行mkvmerge
命令,只需将整个xidel
命令放在FOR
-loop 中:
FOR /F "delims=" %A IN ('xidel -s --xquery "concat('mkvmerge -o "01x01-FINAL.mkv" "',join(file:list(.,false(),'01x01-*.mp4'),'" + "'),'"')"') DO %A
(为什么 --xquery
和 "
?因为 \"
会在循环中导致“escape-character-hell” FOR
)
如果您只使用这两个FOR
-loop,这也意味着SETLOCAL ENABLEDELAYEDEXPANSION
不再需要。
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