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Top Forums UNIX for Advanced & Expert Users Trying to use a convoluted for loop with VLC and Parallel or OpenMPI with no success. Help? Post 302998562 by Don Cragun on Saturday 3rd of June 2017 07:43:59 PM
Old 06-03-2017
What indication do you have that "something in the syntax is tripping it up"? What are the symptoms that something is going wrong?

Of course, one might guess that part of your problem is with the command inside your for loop:
Code:
vlc -I dummy -f $file --sout "#transcode{acodec=mp3,ab=128}:standard{mux=mp3,dst=$NEWFILE.mp3,acce~ss=file}" vlc://quit 2> /dev/null

  1. You define, but do not use, the variable NEWFILE in the command substitution that runs in a subshell environment and disappears before your for loop starts running. So, in that command $NEWFILE will expand to a constant (probably an empty string) value instead of a value based on the name of the file you're processing.
  2. Does the vlc utility really want a sub-option of the form acce~ss=file, or is the tilde (~) in that string a typo?
  3. Instead of throwing away the diagnostic messages produced by the code you're running (2>/dev/null), it might help to actually read those diagnostics and see if they provide any insight into what might be going wrong.
I would also imagine that invoking sed 12 million times makes your script take a long time before it ever gets to the point that it invokes vlc the first time. Why not use a couple of variable expansions inside the loop to avoid invoking sed at all? Note that this operation needs to be in a position where NEWFILE will be paired with the file value it has modified; not in someplace where the vlc command you invoke will be using unpaired $file and $NEWFILE values.
 

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OGMSPLIT(1)							   User Commands						       OGMSPLIT(1)

NAME
ogmsplit - Split OGG/OGM files into several smaller OGG/OGM files SYNOPSIS
ogmsplit [options] inname DESCRIPTION
ogmsplit can be used to easily split an OGM file after a given size. Several OGM files will be created that each start with a keyframe. inname Use 'inname' as the source. -o, --output out Use 'out' as the base name. Ascending part numbers will be appended to it. Default is 'inname'. Examples: 1) If -o output.ogg is given on the command line then ogmsplit will create output-000001.ogg, output-000002.ogg and so on. 2) If no -o option is given and the input's name is movie.ogm then ogmsplit will create movie-000001.ogm and so on. The operation mode can be set with exactly one of -s, -t, -c or -p. The default mode is to split by size (-s). -s, --size size Size in MiB ( = 1024 * 1024 bytes) after which a new file will be opened (approximately). Default is 700MiB. Size can end in 'B' to indicate 'bytes' instead of 'MiB'. -t, --time time Split after the given elapsed time (approximately). 'time' takes the form HH:MM:SS.sss or simply SS(.sss), e.g. 00:05:00.000 or 300.000 or simply 300. -c, --cuts cuts Produce output files as specified by cuts, a list of slices of the form "start-end" or "start+length", separated by commas. If start is omitted, it defaults to the end of the previous cut. start and end take the same format as the arguments to -t. -n, --num num Don't create more than num separate files. The last one may be bigger than the desired size. Default is an unlimited number of files. Can only be used with -s or -t. --frontend Frontend mode. Progress output will be terminated by instead of . -p, --print-splitpoints Only print the key frames and the number of bytes encountered before each. Useful to find the exact splitting point. -v, --verbose Be verbose and show each OGG packet. Can be used twice to increase verbosity. -h, --help Show this help. -V, --version Show version information. CHAPTER INFORMATION
ogmsplit correctly handles chapter information. During the first pass the chapter information, if any is present, will be adjusted to match the output files generated. Chapters that are not contained in the current output file are removed entirely. The other chapters are renum- bered to start at 1, and their timestamps will be recalculated. Example: If your source file contains these four chapters: CHAPTER01=00:00:00.000 CHAPTER01NAME=Chapter 01 CHAPTER02=00:10:00.000 CHAPTER02NAME=Chapter 02 CHAPTER03=00:20:00.000 CHAPTER03NAME=Chapter 03 CHAPTER04=00:25:00.000 CHAPTER04NAME=Chapter 04 and you split after 15 minutes, then the first output file will only contain the first two chapters as shown above, and the second output file will contain the following two chapters and the remaining part of the first: CHAPTER01=00:00:00.000 CHAPTER01NAME=Chapter 02 (continued) CHAPTER02=00:05:00.000 CHAPTER02NAME=Chapter 03 CHAPTER03=00:10:00.000 CHAPTER03NAME=Chapter 04 Note that only variable names are changed, not the chapter names themselves. The exception is the first chapter of the second and follow- ing files where "(continued)" is appended in order to indicate that this is not the start of this chapter. If you want to change them as well you'll have to remerge the resulting file with a new chapter file. AUTHOR
ogmsplit was written by Moritz Bunkus <moritz@bunkus.org>. SEE ALSO
ogmmerge(1), ogminfo(1), ogmdemux(1), ogmcat(1), dvdxchap(1) WWW
The newest version can always be found at <http://www.bunkus.org/videotools/ogmtools/> <http://www.bunkus.org/videotools/ogmtools/> ogmsplit v1.5 November 2004 OGMSPLIT(1)
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