VBRFIX(1) User Commands VBRFIX(1)NAME
vbrfix - fix erroneous VBR MP3 files
SYNOPSIS
vbrfix -flag1 -flag2 -flagn in.mp3 out.mp3
DESCRIPTION
In an average song there are points that require high quality and points that require low quality (i.e., silence). Instead of having the
whole file at 160kbps (CBR - Constant Bit Rate), we can use VBR - Variable Bit rate. This allows us to have say 96Kbps at points not
requiring high quality and 192kbps when we need it: resulting in an overall smaller but higher quality MP3.
However, the problem is that many MP3 programs estimate the time of a MP3 based on the first bitrate they find and the filesize. With VBR
you can get fairly random times; as most songs start with silence you usually get the song length being shown as much longer than it should
be. Also when you jump through the file in VBR: 50% through the file is not 50% through the song.
A VBR null frame is placed at the beginning of the file to tell the MP3 player information about the song length and indexing through the
song. Some poor encoders don't produce this null frame or do so incorrectly - this is what vbrfix attempts to fix. Vbrfix can also fix
other problems with MP3s as it deletes all non-MP3 content (other than tags you state you want to keep).
It can also help when merging two VBR MP3s together with a merging tool and then needing a newly calculated VBR null frame.
-ri1 removeId3v1 Tag
-ri2 removeId3v2 Tag
-skiplame if a tag was made by LAME don't fix it
-always always write a new file even if not VBR
-makevbr make it VBR (you need -always also)
-log write a log file
-lameinfo keep the lame info
SEE ALSO
lame (1)
VBRFIX Command Line Version May 2010 VBRFIX(1)
Check Out this Related Man Page
avimerge(1) General Commands Manual avimerge(1)NAME
avimerge - merge several AVI-files into one
SYNOPSIS
avimerge -o name -i file1 [ file2 [ ... ] ] [ -p file ] [ -a num ] [ -A num ] [ -b num ] [ -c ] [ -f commentfile ] [ -x indexfile ]
COPYRIGHT
avimerge is Copyright (C) by Thomas Oestreich.
DESCRIPTION
avimerge is a versatile tool. It can contatenate several AVI files into one. It can also be used to fix an index of a broken file and can
also replace audio tracks or muxes new ones. It can read raw AC3 and MP3 files for multplexing.
OPTIONS -o name
Specify the name of the output file.
-i file
Specify the name(s) of the input file(s) to merge into the output file.
-p file
Specify the name of the audio file to multiplex into the output file. The type of file can be either another AVI file or an MP3 or
AC3 file.
-b num Specify if avimerge should write an VBR mp3 header into the AVI file. Default is dependent on the input file (and usually correct).
num is either 1 or 0.
-c Drop video frames in case audio is missing [off]
Only when merging multiple AVI files. Some AVI files run a little bit (usually for one or two video frames) short on audio. This
means avimerge cannot keep up sync when concatinating them. The files play fine when played individually but not when merged because
audio from the new file gets played back with video from the old file. avimerge will print a message like
No audiodata left for track 0->0 (59950.25=59950.25) continuing ..
When you turn on the -c option, the video which is too much will be dropped.
-f commentfile
Read AVI tombstone data for header comments from commentfile. See /docs/avi_comments.txt for a sample.
-x indexfile
Read the AVI index from indexfile. See aviindex(1) for information on how to create such a file.
-a num Specify the number of the audio track you want to use from the input file.
-A num Specify the number of the audio track you want to use in the output file. If you specify an existing track number, the track will be
replaced. If omitted, the next free slot will be used.
EXAMPLES
The command
avimerge -o big.avi -i my_file1.avi my_file2.avi my_file3.avi
merges the three input files my_file[123].avi into one big AVI-file big.avi.
avimerge -o out.avi -i in.avi -p audio2.avi -a 1
merges track number 1 form in.avi to the next free track number in out.avi. You can create audio-only AVI-files using
transcode -i song.mp3 -x null,mp3 -g 0x0 -y raw -a 1 -o audio2.avi -u 50
The command
avimerge -o out.avi -i in.avi -p sound.mp3
merges the file sound.mp3 as an additional audio track into out.avi.
AUTHORS
avimerge was written by Thomas Oestreich
<ostreich@theorie.physik.uni-goettingen.de> with contributions from many others. See AUTHORS for details.
SEE ALSO aviindex(1), avifix(1), avisplit(1), tccat(1), tcdecode(1), tcdemux(1), tcextract(1), tcprobe(1), tcscan(1), transcode(1)avimerge(1) 26th January 2004 avimerge(1)