I want to write a fish shell to change the speed of an audio file.
The shell name is speed, I can call it like this:
speed 1.mp3 0.7
Then I will get a new file [0.7x] 1.mp3 with changed speed.
But I have a problem with the destination file name:
speed
#!/usr/local/bin/fish
set source $argv[1]
set ratio $argv[2]
ffmpeg -i $source -filter:a "atempo=$ratio" "[{$ratio}x] $source"
It will output a new file [{0.7}x] 1.mp3, which contains unnecessary {}. But if I remove it as the "[$ratiox] $source", the $ratiox is not correct too.
How to fix it?
The simplest is to exit the quotes:
ffmpeg -i $source -filter:a "atempo=$ratio" "["$ratio"x] $source"
Related
As part of our process, we get an input file in the .gz format. We need to unzip this file and add some suffix at the end of the file. The input file has timestamp so I am trying to use filter while unzipping and renaming this file.
Input file name :
Mem_Enrollment_20200515130341.dat.gz
Step 1:
Unzipping this file : (working as expected)
gzip -d Mem_Enrollment_*.dat.gz
output :
Mem_Enrollment_20200515130341.dat
Step 2: Renaming this file : (issues while renaming)
Again, I am going with the pattern but I know this won't work in this case. So, what should I do rename this file?
mv Mem_Enrollment_*.dat Mem_Enrollment_*.dat_D11
output :
Mem_Enrollment_*.dat_D11
expected output :
Mem_Enrollment_20200515130341.dat_D11
try
for fn in Mem_Enrollment_*.dat
do
mv ${fn} ${fn}_D11;
done
With just datastage you could loop over ls output from an execute command stage via "ls Mem_Enrollment_*.dat.gz" and then use an #FM as a delimiter when looping the output list. You could then breakout the gzip and rename into two separate commands, which helps with readability in your job.
Only caveat here is that the Start Loop stage doesn't accept the #FM in the delimiter due to some internal funkyness inside Datastage. So you need to set a user variable equal to it and pass that to the mark.
I am using BPXBATCH to concatenate an unknown number of files to 1 single file, then porting the single file to the mainframe; The files are VB: The files append after the last byte of previous file and I would like to append new file at beginning of new record on the Single file
What Data looks like:
File1BDT253748593725623.....File2BDT253748593725623.......
...............File3BDT253748593725623....
Here is what I would like it to look like:
File1BDT253748593725623.....
File2BDT253748593725623.......
...............
File3BDT253748593....
725623
Here is the BPXBATCH SH command I am using.
BPXBATCH SH cat /u/icm/comq/tmp1/rdq40.img.bin* > +
/u/icm/comq/tmp1/rdq40.img.all
Does anyone know a way to accomplish this?
You should use something like:
SH for f in /u/icm/comq/tmp1/rdq40.img.bin* ; do cat $f >> /u/icm/comq/tmp1/rdq40.img.all ; done
you can also copy your file to an MVS Sequential Dataset with the following syntax "//'RDQ40.IMG.ALL'". Not all shell commands understand it. cp and mv does.
I use UNIX fairly infrequently so I apologize if this seems like an easy question. I am trying to loop through subdirectories and files, then generate an output from the specific files that the loop grabs, then pipe an output to a file in another directory whos name will be identifiable from the input file. SO far I have:
for file in /home/sub_directory1/samples/SSTC*/
do
samtools depth -r chr9:218026635-21994999 < $file > /home/sub_directory_2/level_2/${file}_out
done
I was hoping to generate an output from file_1_novoalign.bam in sub_directory1/samples/SSTC*/ and to send that output to /home/sub_directory_2/level_2/ as an output file called file_1_novoalign_out.bam however it doesn't work - it says 'bash: /home/sub_directory_2/level_2/file_1_novoalign.bam.out: No such file or directory'.
I would ideally like to be able to strip off the '_novoalign.bam' part of the outfile and replace with '_out.txt'. I'm sure this will be easy for a regular unix user but I have searched and can't find a quick answer and don't really have time to spend ages searching. Thanks in advance for any suggestions building on the code I have so far or any alternate suggestions are welcome.
p.s. I don't have permission to write files to the directory containing the input folders
Beneath an explanation for filenames without spaces, keeping it simple.
When you want files, not directories, you should end your for-loop with * and not */.
When you only want to process files ending with _novoalign.bam, you should tell this to unix.
The easiest way is using sed for replacing a part of the string with sed.
A dollar-sign is for the end of the string. The total script will be
OUTDIR=/home/sub_directory_2/level_2
for file in /home/sub_directory1/samples/SSTC/*_novoalign.bam; do
echo Debug: Inputfile including path: ${file}
OUTPUTFILE=$(basename $file | sed -e 's/_novoalign.bam$/_out.txt/')
echo Debug: Outputfile without path: ${OUTPUTFILE}
samtools depth -r chr9:218026635-21994999 < ${file} > ${OUTDIR}/${OUTPUTFILE}
done
Note 1:
You can use parameter expansion like file=${fullfile##*/} to get the filename without path, but you will forget the syntax in one hour.
Easier to remember are basename and dirname, but you still have to do some processing.
Note 2:
When your script first changes the directory to /home/sub_directory_2/level_2 you can skip the basename call.
When all the files in the dir are to be processed, you can use the asterisk.
When all files have at most one underscore, you can use cut.
You might want to add some error handling. When you want the STDERR from samtools in your outputfile, add 2>&1.
These will turn your script into
OUTDIR=/home/sub_directory_2/level_2
cd /home/sub_directory1/samples/SSTC
for file in *; do
echo Debug: Inputfile: ${file}
OUTPUTFILE="$(basename $file | cut -d_ -f1)_out.txt"
echo Debug: Outputfile: ${OUTPUTFILE}
samtools depth -r chr9:218026635-21994999 < ${file} > ${OUTDIR}/${OUTPUTFILE} 2>&1
done
I want to remove lots of temporary PS datasets with dataset name like MYTEST.**, but still can't find an easy way to handle the task.
I meant to use a Shell command below to remove them
cat "//'dataset.list'"| xargs -I '{}' tsocmd "delete '{}'"
However, first I have to save the dataset list into a PS dataset or Unix file. In Unix, we can redirect output of ls command into a text file: "ls MYTEST.* > dslist", but on TSO or ISPF panel, seems no simple command to do that.
Anyone has any clue on this? Your comment would be appreciated.
Rexx ISPF option is probably the easiest and can be used in the future, but options include:
Use the save command in ispf 3.4 to save to a file, then use a rexx program on the file created by the save command
listcat command, in particular
listcat lvl(MYTEST) ofile(ddname)
then write a rexx program to do the actual delete
Alternatively you can use the ISPF services LMDINIT, LMDLISTY & LMDFREE in a rexx program running under ISPF i.e.
/* Rexx ispf program to process datasets */
Address ispexec
"LMDINIT LISTID(lidv) LEVEL(MYTEST)"
"LMDLIST LISTID("lidv") OPTION(list) dataset(dsvar) stats(yes)"
do while rc = 0
/* Delete or whatever */
end
"LMDFREE LISTID("lidv")"
For all these methods you need to fully qualify the first High level qualifier.
Learning what Rexx / ISPF will serve you into the future. In the ISPF Editor, you can use the model command to get Templates / information for all the ISPF commands:
Command ====> Model LMDINIT
will add a template for the lmdinit command. There are templates for rexx, cobol, pl1, ISPF-panels, ISPF-skeletons messages etc.
Thanks Bruce for the comprehensive answer. According to Bruce's tips, I just worked out a one-line Shell command as below:
tsocmd "listcat lvl(MYTEST) " | grep -E "MYTEST(\..+)+" | cut -d' ' -f3 | xargs -I '{}' tsocmd "delete '{}'"
Above command works perfectly.
Update - The IDCAMS DELETE command has had the MASK operand for a while. You use it like:
DELETE 'MYTEST.**' MASK
Documentation for z/OS 2.1 is here.
I do not want:
$ cat file > dummy; $ cat header dummy > file
I want similar to the command below but to the beginning, not to the end:
$ cat header >> file
You can't append to the beginning of a file without rewriting the file. The first way you gave is the correct way to do this.
This is easy to do in sed if you can embed the header string directly in the command:
$ sed -i "1iheader1,header2,header3"
Or if you really want to read it from a file, you can do so with bash's help:
$ sed -i "1i$(<header)" file
BEWARE that "-i" overwrites the input file with the results. If you want sed to make a backup, change it to "-i.bak" or similar, and of course always test first with sample data in a temp directory to be sure you understand what's going to happen before you apply to your real data.
The whole dummy file thing is pretty annoying. Here's a 1-liner solution that I just tried out which seems to work.
echo "`cat header file`" > file
The ticks make the part inside quotes execute first so that it doesn't complain about the output file being an input file. It seems related to hhh's solution but a bit shorter. I suppose if the files are really large this might cause problems though because it seems like I've seen the shell complain about the ticks making commands too long before. Somewhere the part that is executed first must be stored in a buffer so that the original can be overwritten, but I'm not enough of an expert to know what/where that buffer would be or how large it could be.
You can't prepend to a file without reading all the contents of the file and writing a new file with your prepended text + contents of the file. Think of a file in Unix as a stream of bytes - it's easy to append to an end of a stream, but there is no easy operation to "rewind" the stream and write to it. Even a seek operation to the beginning of the file will overwrite the beginning of with any data you write.
One possibility is to use a here-document:
cat > "prependedfile" << ENDENDEND
prepended line(s)
`cat "file"`
ENDENDEND
There may be a memory limitation to this trick.
Thanks to right searchterm!
echo "include .headers.java\n$(cat fileObject.java )" > fileObject.java
Then with a file:
echo "$(cat .headers.java)\n\n$(cat fileObject.java )" > fileObject.java
if you want to pre-pend "header" to "file" why not append "file" to "Header"
cat file >> header
Below is a simple c-shell attempt to solve this problem. This "prepend.sh" script takes two parameters:
$1 - The file containing the pre-appending wording.
$2 - The original/target file to be modified.
#!/bin/csh
if (if ./tmp.txt) then
rm ./tmp.txt
endif
cat $1 > ./tmp.txt
cat $2 >> ./tmp.txt
mv $2 $2.bak
mv ./tmp.txt $2