Bug#789254: This sample seems not to be processable by FFmpeg

[Peter Belkner]

BS1770GAIN is based on FFmpeg. If a file is not processable by FFmpeg it 
is not processable by BS1770GAIN.

This particular sample file seems not to be processable by FFmpeg. Try 
e.g. the following command

    $ ffmpeg -i samples/20030213-cvs.mpeg -acodec copy -vcodec copy -y 20030213-cvs.mpeg

The workaround is to pre-process the file first by mkvmerge into an 
intermediate MKV file and then process the resulting intermediate MKV 
file by BS1770GAIN

    $ mkvmerge samples/20030213-cvs.mpeg -o samples/20030213-cvs.mkv
       mkvmerge v8.0.0 ('Til The Day That I Die') 64bit
       'samples/20030213-cvs.mpeg': Using the demultiplexer for the format 'MPEG program stream'.
       'samples/20030213-cvs.mpeg' track 0: Using the output module for the format 'MPEG-1/2'.
       'samples/20030213-cvs.mpeg' track 1: Using the output module for the format 'MP3'.
       The file 'samples/20030213-cvs.mkv' has been opened for writing.
       Warning: 'samples/20030213-cvs.mpeg' track 1: This MPEG audio track contains 279 bytes of non-MP3 data which were skipped. The audio/video synchronization may have been lost.
       Progress: 100%
       The cue entries (the index) are being written...
       Muxing took 1 second.

NOTE: Please observe the warning!

    $ ./mingw32/bin/bs1770gain ./samples/20030213-cvs.mkv -ao norm
       analyzing ...
         [1/1] "20030213-cvs.mkv":
             integrated:  -34.7 LUFS / 11.7 LU
       transcoding ...
         [1/1] "20030213-cvs.mkv"
       done.

Regards,

Peter Belkner

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