I'm converting a couple thousand .wem files to .wav format. Since .wem is an obscure file format, I've decided to convert the files with SoX.
The SoX standard installation includes a batch file for use with mass converting raw files, which I've happily used. I've modified the example to remove the need to drag and drop files onto the batch file, using nested loops.
cd %~dp0
mkdir converted
for %%f in (*.wem) do FOR %%A IN (%*) DO sox -t raw -e signed-integer -b 16 -c 1 -r 44100 %%A "converted/%%~nA.wav"
pause
It creates a /converted directory just fine, and then proceeds to output the command, the directory, and then moves on to (supposedly) the next file. Unfortunately, opening the /converted directory reveals that nothing was generated at all, and the conversion took a lot less time than it should have. I've tested it with .wem files prior, and it converts just fine, so I don't think it has anything to do with the format. More likely, it just has something to do with my amateur batch file programming. Any ideas?
Solved, thanks to Mofi.
Finished code:
cd %~dp0
mkdir converted
for %%I in (*.wem) do sox -t raw -e signed-integer -b 16 -c 1 -r 44100 "%%I" "converted\%%~nI.wav"
pause
Seems I really could do it in one loop.
Related
How do I write a .bat file in Windows 10 that changes the frame rate for multiple mp4 video clips in a folder? For example; change the frame rate from 50fps to 25fps (without re-encoding or dropping frames, so that footage is essentially slowed down.)
At the moment these are the commands I've tried using in two separate .bat text files. (I'd like to combine them but don't know how yet).
for %%A IN (*.mp4) DO ffmpeg -y -i "%%A" -c copy -f h264 "%%A.h264"
for %%A IN (*.h264) DO ffmpeg -y -r 25 -i "%%A" -c copy
"%%A_25.mp4"
Problem is these commands don't replace the file extension type, they append to the existing one, ie. '.mp4' becomes '.mp4.h264' then '.mp4.h264_25fps.mp4', and I can't get the second one to work for some reason.
Any advice appreciated. How do I replace the existing file extensions for a group of clips and combine commands into a single .bat?
I have over 1000 audio files, all of which end in a mouse click. I would like to remove the last half second from all of them. The audio files have different length (i.e. 15sec, 5 sec ...) But one thing in common with all of them is the last half second has a mouse click sound. How do I trim in bulk the ending of the mp3 files within a folder using windows 10 command line? I already have FFMPEG downloaded. Thank you!
This is two questions in one:
How to remove the last 0.5 seconds from inputs of arbitrary durations?
How to incorporate this into a Windows batch script?
I'll answer #1 because I'm not a Windows user. The batch scripting will be up to you.
Get duration using ffprobe:
ffprobe -v error -show_entries format=duration -of csv=p=0 input.mp3
Trim using ffmpeg:
ffmpeg -i input.mp3 -t <duration> -c copy output.mp3
Replace <duration> with the output from ffprobe minus 0.5 seconds.
How to incorporate this into a Windows batch script?
This should do:
FOR %%A IN (*.mp3) DO (
FOR /F %%B IN ('ffprobe.exe -v error -show_entries format^=duration -of csv^=p^=0 "%%~A" ^| xidel -s - -e ". - 0.5"') DO (
ffmpeg.exe -i "%%~A" -t %%B -c copy "%%~dpnA_trimmed.mp3"
)
)
First of all, doing floating point calculations in Batch is officially impossible and unofficially really hard to script. That's why I suggest to let Xidel do the math. It's first of all a command line tool to download and extract data from HTML/XML/JSON, but it can do A LOT more!
Loop over all mp3-files in the current directory.
The ffprobe command as suggested by llogan piped to Xidel to subtract the 0.5s. For example, 25.547755 now becomes 25.047755.
Don't forget to escape the necessary characters inside the for-loop! The = and | in this case.
The ffmpeg command as suggested by llogan, which opens "%%~A (the mp3-file), sets the duration to %%B and creates a new mp3-file (<filename>_trimmed.mp3).
This code assumes the mp3-files, ffprobe.exe, xidel.exe and ffmpeg.exe are all in the same directory.
I have videos in a folder of .h264 format and i want to convert them to mp4. now by default i can use ffmpeg to do this:
Here is the command:
ffmpeg -i youtube.flv -c:v libx264 filename.mp4
But, new h264 files are being added and I want to keep converting the videos so as to use it for my python script.
I know i can use this to initialize the variable
SET /A num=1
But how do i write a batch script to take all the videos from the directory one by one even though there new videos being added?
I wrote this but this isn't working:
#echo off
SET /A num=1
for file in E:\Records\1\*.h264
do
ffmpeg -i "$file" -c:v libx264 E:\Recods\1\converted\%num%.mp4
move E:\Records\1\"$file" E:\Records\1\done\
set /A num=%num%+1
done
PAUSE
I am making a done folder and moving the videos that have been converted there and in converted folder i am putting converted videos.. Now i just have to run a task scheduler each hour so that if there is a new entry it should convert it and move it to appropriate folder.
You can loop over all files (even with applying a filter) in a folder using the for loop in batch like this:
#echo off
setlocal EnableDelayedExpansion
set /a vid=0
cd /d "your_Folder\Goes here"
for %%f in (*.h264) do (
ffmpeg -i "%%~f" -c:v libx264 "!vid!.mp4"
set /a vid=!vid!+1
)
So what happens here?
The first line is used to have the program running in the correct directory.
After that all files ending with .h264 (might be a different ending in your case; just took it from the question) in that directory are processed using your command. For that the filepath is placed in the spot for the input file and the counter together with .mp4 is placed as the outputfile.
The counter is a bit more tricky because of how sets of parenthesis are evaluated in batch, which is as one whole block. As solution for this there are a lot of questions and answers on SO. Look for "Delayed Expansion batch" and you will find something like this answer.
Placing this as a Task-Scheduler-Task running on a regular basis should keep your folder updated. For actually monitoring the folder I found this impressive code that can be used in combination with the Task-Scheduler to run that on startup. If the monitoring triggers, you can execute the batch-file above and it should be run each time a file is added. You can adjust the powershell-file with file-filters as well to make it fit your needs.
I have a lot of gifs I want converted to webms in many sub directories, and I have this script which will do it, but it will output to the directory where the script is located:
for /r %%a in ("*.gif") do ffmpeg -i "%%a" -c:v libvpx -crf 12 -b:v 4000k "%%~na.webm"
pause
I've tried a bunch of things, but I can't figure out how to get the output to land in the same sub directory as the input file so I can maintain the folder structure.
Edit: it's a Windows batch file I'm using.
You are missing two command modifiers for your output filename.
"%%~dpna.webm"
I have a directory with many folders containing hundreds of .SPH files. I need to convert all .SPH files into .wav format. I have adopted the following code:
cd %~dp0
mkdir converted
FOR %%A IN (%*) DO sox -t raw -s -2 -r 22050 -c 2 %%A "converted/%%~nA.wav"
pause
However, it doesn't do anything on Windows 7. When I try the code on CMD inside a folder where some of .SPH are:
sox *.SPH output.wav
It embeds all *.SPH into output.wav file, which is not what I want. I need name1.SPH to name1.wav, name2.SPH to name2.wav
Please help.
For Linux consider this:
for f in *.SPH; do sox -t sph "$f" -b 16 -t wav "${f%.*}.wav"; done
In Windows 7, I need to provide the entire path for the destination files, and the mdkir command got a permission error even though I was running as Administrator, so pre-make your destination directory and delete the mkdir command, and then your SOX command should look similar to this (with your own flags based on the conversion or edit you are trying to accomplish):
FOR %%A IN (%*) DO sox -t raw -e mu-law -c 1 -r 8000 %%A c:\converted\%%~nA.wav
The cmd file should not be in the folder where the files are, it should be in the folder where SOX is installed, and then drag the files you want converted onto the cmd (or bat) file.
for %%a in (*.sph) do sox "%%~a" "%%~na.wav"
Make a .bat file in your sox directory with the contents
cd %~dp0
for %%a in (*.sph) do sox "%%~a" "%%~na.wav"
pause
Select and drag the files that you want to convert onto this .bat file and the .wav files with the same names as the .sph files will appear in the same folder as the .sph files.