converting midi to wav in solaris 10 Post: 302260899

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Operating Systems Solaris converting midi to wav in solaris 10 Post 302260899 by incredible on Saturday 22nd of November 2008 06:52:02 AM

11-22-2008

Registered User

We will be using 3 tools: transcode, mplayer's mencoder and ffmpeg - all commandline tools. Anybody who has been keeping track of this journal should by now be aware that if I can, I avoid GUI point-n-click apps like the plague. Lastly, this mini howto is by no means exhaustive.

Basics
mencoder
-ovc codec for video output
-oac codec for audio output
-o outfile.avi

mencoder infile.avi -ovc lavc -oac lavc -o outfile.avi

transcode
-i input_filename.mpg
-y codec for audio/video output
-o output_filename.avi

transcode -i infile.mpg -o outfile.avi -y divx

ffmpeg

ffmpeg -i myfile.avi -target vcd /tmp/vcd.mpg

Video CD
ffmpeg -i infile.avi -target ntsc-vcd outfile.mpg

Flash Videos
ffmpeg -i infile.mpg -ab 256 outfile.flv

*note:

Use the �-ab� switch to control the sound quality. 64 is okay for home vidoes. For music you want something higher like 256.
XviD
First, something about video bitrates.

Crummy youtube-like video is around 80-150.
VCD quality is around 400-500.
DVD quality is approx 800.
Default bitrate for mencoder is 687kbps.
mencoder infile.avi -ovc xvid -oac mp3lame -xvidencopts bitrate=687 -o outfile.avi

*notes:

If you want the outfile to have an estimated size (like 700mb), set a negative bitrate and replace the bitrate value with the expected size of the outfile like:
-bitrate=-700000 - will give you a ~700mb avi file.

Two-pass encodings will give a nicer video but will take longer to convert:
mencoder infile.wmv -ofps 23.976 -oac mp3lame -lameopts abr:br=92 -ovc xvid -xvidencopts pass=2:bitrate=150 -o audiofix-150bit-xvid.avi

Audio quality can be set via the -lameopts switch if you're using mp3lame (-oac mp3lame) for the audio format:
mencoder infile.avi -ovc xvid -oac mp3lame -lameopts abr:br=256 -xvidencopts bitrate=800 -o outfile.avi

Microsoft media files (*.wmv, *.asf, *.wmx)
Just follow the howto for Xvid and replace the infile.avi with any M$.wmv file you have. There's an issue regarding some players (Xine) not being able to play wmv->xvid files converted using mencoder. Just use the -ofps 23.976 switch for that.

DivX
transcode -i infile.mpg -o outfile.avi -y divx

DVD
ffmpeg -i infile.avi -target ntsc-dvd dvd.mpg

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tcscan

tcscan(1)						      General Commands Manual							 tcscan(1)

NAME

       tcscan - scan multimedia streams from medium and print information on the standard output

SYNOPSIS

       tcscan -i name [ -x codec ] [ -e r[,b[,c]] ] [ -b bitrate ] [ -w num ] [ -f rate ] [ -d verbosity ] [ -v ]

COPYRIGHT

       tcscan is Copyright (C) by Thomas Oestreich.

DESCRIPTION

       tcscan is part of and usually called by transcode.
       However, it can also be used independently.
       tcscan reads source (from stdin if not explicitely defined) and prints on the standard output.

OPTIONS

       -i name
	      Specify input source.  If ommited, stdin is assumed.
	      You  can	specify a file, directory, device, mountpoint or host address as input source.	tcscan usually handles the different types
	      correctly.

       -d level
	      With this option you can specify a bitmask to enable different levels of verbosity (if supported).  You can combine  several  levels
	      by adding the corresponding values:

	      QUIET	    0

	      INFO	    1

	      DEBUG	    2

	      STATS	    4

	      WATCH	    8

	      FLIST	   16

	      VIDCORE	   32

	      SYNC	   64

	      COUNTER	  128

	      PRIVATE	  256

       -v     Print version information and exit.

NOTES

       tcscan  is  a  front  end  for  scaning various source types and is used in transcode's import modules.	tcscan does a complete scan of the
       source to gather information.

EXAMPLES

       The command tcscan -i foo.avi prints header information about the AVI-file itself and lists details on the video and audio  content,  e.g.,
       keyframes, chunk structure.

       The command cat audio.pcm | tcscan -x pcm -e 48000,16,2 simply determines the playtime lenghth of the raw audio stream.

       The command tcscan -x mp3 -i input.mp3 will print the number of chunks in the MP3 file and the average bitrate.

AUTHORS

       tcscan was written by Thomas Oestreich
       <ostreich@theorie.physik.uni-goettingen.de> with contributions from many others.  See AUTHORS for details.

SEE ALSO

       avifix(1), avisync(1), avimerge(1), avisplit(1), tcprobe(1), tcscan(1), tccat(1), tcdemux(1), tcextract(1), tcdecode(1), transcode(1)

tcscan(1)							23th September 2002							 tcscan(1)