Add README file with documentation for using scripts

README

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+README for csc-media
+Elana Hashman
+November 3, 2014
+--------------------
+
+
+These FFMPEG scripts are intended to help you cut and compress assorted videos: 
+in particular, the MTS raw output from the CSC's video camera.
+
+
+How to use the scripts
+======================
+
+1. First, prepare your video files. To merge files, if you are using MTS 
+   format, simply cat the files together, i.e.
+
+   cat vid1.mts vid2.mts vid3.mts > the_whole_vid.mts
+
+   If you need to trim the files, you can use the cut-mts.sh script:
+
+   ./cut-mts.sh vid.mts  00:05:00    00:10:00
+                input    start-time  length
+
+2. Run encode.sh on the file you're interested in compressing. This will run a 
+   two-pass compress and encode to produce a final video file.
+
+   Caveats:
+   - encode.sh must be run in the same directory as the video files
+   - encode.sh's dependencies need to be in the same directory
+   - Therefore, you should clone a copy of csc-media into any directory you 
+     want to run the job.
+   - You can only run encode.sh on one file in one directory. Otherwise, the 
+     video cues from the first pass will be overwritten. If you want to run 
+     simultaneous encoding jobs, clone a copy of the scripts into each 
+     directory with each file you want to encode.
+
+   Invoke the script like this, preferably in a screen session due to job 
+   length:
+
+   ./encode.sh vid.mts  vid                   ""
+               input    prefix, output files  extra ffmpeg flags (usually null)
+
+3. Wait.
+
+4. Wait.
+
+5. Check htop, keep waiting.
+
+6. Wait.
+
+6. Voila, your videos have been compressed and encoded! Additionally, the 
+   scripts will even kindly provide you with jpg thumbnails for the website.
+
+
+Notes
+=====
+
+All compression schemes except mp4 are currently disabled in ./encode.sh. None 
+of the other scripts are currently verified to be working.
+
+These scripts use a copy of ffmpeg in Peter ``BOFH'' Barfuss' home directory. 
+If those become unavailable for some reason, you will need to set it to the 
+system-wide binary.
+