From cc972d94b6520d2519bd5da6a16a51776da21e31 Mon Sep 17 00:00:00 2001 From: kfrn Date: Mon, 31 Oct 2016 21:00:56 +1300 Subject: [PATCH] Expand batch processing command --- index.html | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) diff --git a/index.html b/index.html index fb712c9..8f20a55 100644 --- a/index.html +++ b/index.html @@ -671,17 +671,28 @@
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Create Bash Script named “Rewrap-MXF.sh” to do Batch FFmpeg Processing

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for f in *.MXF; do ffmpeg -i "$f" -map 0 -c copy "${f%.MXF}.mov"; done

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Re-wrap .MFX files in a specified directory to .mov files by using this code within a .sh file. The shell script (.sh file) and all MXF files must be contained in the same directory, and the script must be run from the directory itself (cd ~/Desktop/MXF_file_directory). Execute .sh file with the command sh Rewrap-MXF.sh

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Create Bash script to batch process with ffmpeg

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Bash scripts are plain texts files saved with a .sh extension. This entry explains how they work with the example of a bash script named “Rewrap-MXF.sh”, which rewraps .MXF files in a given directory to .MOV files.

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“Rewrap-MXF.sh” contains the following text:

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for file in *.MXF; do ffmpeg -i "$file" -map 0 -c copy "${file%.MXF}.mov"; done

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-map 0
select all input streams to map to output
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-c copy
enable stream copy. This will re-mux wihout re-encoding, so quality is preserved
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for file in *.MXF
starts the loop, and states what the input files will be. Here, the ffmpeg command within the loop will be applied to all files with an extension of .MXF.
+ The word ‘file’ is an arbitrary variable which will represent each .MXF file in turn as it is looped over.
+ Per Bash syntax, within the command this variable is referenced with a dollar sign, e.g. as $file
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do ffmpeg -i "$file"
carry out the following ffmpeg command for each input file
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-map 0
retain all streams
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-c copy
enable stream copy (no re-encode)
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"${file%.MXF}.mov";
retaining the original file name, set the output file wrapper as Quicktime (.mov)
+
done
complete; all items have been processed.
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Note: the shell script (.sh file) and all .MXF files to be processed must be contained within the same directory, and the script must be run from that directory.
+ Execute the .sh file with the command sh Rewrap-MXF.sh.

Modify the ffmpeg script as needed to perform different transcodes :)

+

The basic pattern will look similar to this:
+ for item in *.ext; do ffmpeg -i $item "${file%.ext}_suffix.ext"

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e.g., if an input file is bestmovie002.avi, its output will be bestmovie002_suffix.avi.

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