Kdenlive/Підручник/Підказки зі знімання

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ПІдказки зі знімання

Використання знятого матеріалу на P2 з Panasonic HVX200 у GNU/Linux, тестовано на Ubuntu

Using footage from P2 cards is easy when you know how! The MXF files on P2 cards cannot be read until you convert them with mxfsplit, a part of FreeMXF. The conversion is lossless and the resulting files contain both video and audio and can be edited in real time with Kdenlive (or Blender 2.5+) on most computers made within the last five years or so. Also, FFMPEG can read these files. This process is very fast because there is no transcoding and so can be done in the field while shooting just as fast as simply transferring the original p2 files.

Перший крок. FreeMXF

Get the source code for MFXlib from here.

Then configure, compile, and install it by running the following code in the directory where you saved the source files:

./configure
make
sudo make install

This will get mxfsplit (part of mxflib) working.

Другий крок. Використання mxfsplit

Here is a simple script that can be run in the terminal. It will convert all MXF files in a chosen directory into usable files. Do a search and replace for /source/directory and /destination/directory

# /source/directory
# /destination/directory
#
# change to destination directory
cd /destination/directory
#find all *.MXF files in a specific directory and loop through them using the variable 'i'
for i in /source/directory/*.MXF
do
# use mxfsplit to convert files
STREAM=`mxfsplit -m $i | grep “File=” | cut -c 31-52`
# rename the files so they make sense, appending the word 'converted' to the end of the basename
mv *.Stream "`basename $i .MXF`converted.MXF"
#end loop
done

Висновки

Now you have a script that can easily prepare footage for editing (i.e. with Kdenlive or Blender) and for transcoding (i.e. ffmpeg). FFMPEG can be used to transcode the resulting .MXF files to whatever format is preferred. For example, this would get the files ready for Youtube, Vimeo, etc.:

cd ""
for i in *.*
do
ffmpeg -threads 2 -i $i -acodec libmp3lame -aq 192 -vcodec libx264 -vpre slow converted$i.mp4
done