batch that verify if all the video files parsed have the same resolution

[marcorocchini]

Hi, and i'm a cat

and even though.

---

I try to do a batch file that concatenate using ffmpeg all the .mp4 in a directory, but first have to analize all the files parsed to verify is all the files have:

the same resolution
the same framerate
the same codec
the rotation flag

At the moment I have build this code that simply concatenate all the .mp4 except for the final concatenated one (using fart.exe to delete the output file from the list of files to be concatenated)

@Echo Off

color 6

if exist concatList.txt del concatList.txt

setlocal

for %%f in (*.mp4) do echo file '%cd%\%mypath%%%f' >> "concatList.txt"

fart.exe concatList.txt "file '%cd%\conCAT.MP4'" --remove

endlocal

ffmpeg64bit_2019.exe -y -threads 12 -y -f concat -safe 0 -i concatList.txt -map 0:? -ignore_unknown -vcodec copy -acodec copy -aspect 16:9 conCAT.MP4

if exist concatList.txt del concatList.txt

exit

supposing in a folder are present 120.mp4 121.mp4 122.mp4 123.mp4, the batch have to concatenate all in one unique conCAT.MP4.
In this case, for example, concatlist.txt become

file 'C:\Users\Administrator\Desktop\Loris\120.mp4' 
file 'C:\Users\Administrator\Desktop\Loris\121.mp4' 
file 'C:\Users\Administrator\Desktop\Loris\122.mp4' 
file 'C:\Users\Administrator\Desktop\Loris\123.MP4'

But only if they have the same resolution the same framerate the same codec the rotation flag... if they are identical. How can I do thanks
?

[CDK]

You can use MediaInfo to get this info:

MediaInfo.exe file.mp4 > file.txt

And now you need to find and compare several lines in text files. I don't know how to do it in a command line, but I think it should be possible...

PS: this can help https://stackoverflow.com/questions/41231998/mediainfo-cli-command-line-interface-synt...e-once-for-all

[marcorocchini]

an idea to start would be

:

@Echo Off

color 6

if exist concatList.txt del concatList.txt
if exist %cd%\conCAT.MP4 del %cd%\conCAT.MP4

setlocal

for %%f in (*.mp4) do echo file '%cd%\%mypath%%%f' >> "concatList.txt"
fart.exe concatList.txt "file '%cd%\conCAT.MP4'" --remove
for /f "delims=" %%F in ('dir *.MP4 /b /o-n') do set FirstFile="%cd%\%%F"
echo 1st file is %FirstFile%
pause

mediainfo.exe %FirstFile% dumpinfo:unicodefile.txt
TYPE unicodefile.txt>mediainfo.txt

rem *********

IF exist unicodefile.txt DEL unicodefile.txt
IF exist mediainfo.txt DEL mediainfo.txt

endlocal


ffmpeg64bit_2019.exe -y -threads 12 -y -f concat -safe 0 -i concatList.txt -map 0:? -ignore_unknown -vcodec copy -acodec copy -aspect 16:9 conCAT.MP4
if exist concatList.txt del concatList.txt

exit

where if in a folder there is (for example) 120.mp4 121.mp4 122.mp4 123.mp4

%FirstFile% assume 120.mp4 as first file.
Mediainfo should parse %FirstFile% and store resolution, framerate, rotation and codec info and compare the info with all other .mp4 to verify if all the .mp4 files are concatenable

If the files do not have the same characteristics, the batch returns an error and exits. If they are similar it continues in the concatenation process.

Really it would be perhaps interesting that if the batch finds a rotated file (for example by 90 °) it is first remuxed as straight and then concatenated, but this is already another question)
I

[_Al_]

#24 input and further there are some subroutines that you can use:
https://forum.videohelp.com/threads/377677-Video-batch-files

but for all kids out there, if deciding to make some codes to automatize processes, do not do this using microsoft batch code, use python instead

[marcorocchini]

interesting batch, even if at the moment I don't seem to find something that exactly compares the metadata of several files one with the others. In practice it would be a question of comparing if the resolution-framerate-idcodec-rotation of all the files present in a folder are exatly the same. If anyone wants to help the cat

[_Al_]

you have a subroutine that gives you w, h, fps (add codec and rotation) of the first file, save them to different variables

then run that subroutine for each file and if file does not have the same values as those in first file, do not add them in the list

[marcorocchini]

thanks but a litte complicated for a cat-brain

however I would like to do another thing, if someone helps me: we still consider the original batch. When I run the batch inside a folder that contains some .mp4 files it generate a final file called concat.txt which contains the names of the individual .mp4 files. But now I need to generate also a concat.txt of the only file drag and dropped to the batch. In this case how should I modify the batch?

[JN-]

Hi marcorocchini, you can use ffmpegs ffprobe to get these items …
resolution
framerate
codec

Not at PC now so not sure about rotation.