To answer your original query about the file expansion I think you
have just copied the video and expanded the audio to pcm (e..g WAV or
CD format) which is many times (10x?) larger than say mp3.
See the " -oac pcm -ovc copy" part of your command.
I think -oac -> output audio codec is set to pcm
and -ovc -> output video codec is copy (just copies it).
Hence the Video is not shrunk and the audio is blown up massively...
You have to be careful what codecs you put into the container as some
players won't accept strange combinations. I don't know if you will
end up with an .avi with a .mkv file suffix or not either...
On the bright side perhaps this will help?
Here are some old shell functions that use mencoder to do 1 pass and
2 pass (better quality with 2 passes).
May be it's useful for you or others?
I haven't really tested them lately so make a copy and try it out on that.
It uses old (but widely supported now) DiVx codec and mp3 so I am sure
there are much more powerful options available now,
Note $1 => first argument in a shell function.
Save them into a file like vid.sh and source it and use it as follows:
. ./vid.sh
1passEncode <VideoRate> <AudioRate> <File>
To do a 1 pass encode at given video rate/ audio rate on to a file
(output is movie.avi)
To do the slower but better quality encoding try the two pass.:
2passEncode 858 96 video.avi
will generate an encoding a video bit rate of 858 . audio (mp3) at
96 on existing file video.avi and into newvideo.avi. be aware it uses
temporary file move.avi to work on...
There are also another that just does video and one that allows the
size to be shrunk.
------------------- Cut below here and place into a file e.g. vid.sh -----------
# Perform the 1pass encoding based on the given video code rating
function 1passEncode () {
BitRate=$1
AUBR=$2
IFile=$3
L0=-lavcopts
L1=mp3lame
L2=-lameopts
L3="vbr=3:br=$AUBR"
MD="-ffourcc"
Codec="vcodec=mpeg4:vhq:vbitrate=$BitRate"
Pass1Args=${Codec}
echo rm -f frameno.avi lavc_stats.txt divx2pass.log
rm -f frameno.avi lavc_stats.txt divx2pass.log
echo mencoder $MD DIVX -ovc lavc $L0 $Pass1Args -oac $L1 $L2 $L3 -o
movie.avi $IFile
mencoder $MD DIVX -ovc lavc $L0 $Pass1Args -oac $L1 $L2 $L3 -o
movie.avi $IFile
}
# 1pass Video only encode (copy audio)
function 1passVideoEncode () {
IFile=$1
BitRate=${2:-2000}
L0=-lavcopts
MD="-ffourcc"
Codec="vcodec=mpeg4:vhq:vbitrate=$BitRate"
Pass1Args=${Codec}
echo rm -f frameno.avi lavc_stats.txt divx2pass.log
rm -f frameno.avi lavc_stats.txt divx2pass.log
echo mencoder $MD DIVX -ovc lavc $L0 $Pass1Args -oac copy -o movie.avi $IFile
mencoder $MD DIVX -ovc lavc $L0 $Pass1Args -oac copy -o movie.avi $IFile
}
# Perform the 2pass encoding based on the given video code rating
function 2passEncode () {
BitRate=$1
AUBR=$2
IFile=$3
CC=${4:-"XVID"}
L0=-lavcopts
L1=mp3lame
L2=-lameopts
L3="vbr=3:br=$AUBR"
L4="-ffourcc"
Codec="autoaspect:vcodec=mpeg4:vhq:vbitrate=$BitRate:vpass="
Pass1Args=${Codec}1
Pass2Args=${Codec}2
echo rm -f frameno.avi lavc_stats.txt divx2pass.log
rm -f frameno.avi lavc_stats.txt divx2pass.log
echo mencoder -ovc lavc $L0 $Pass1Args -oac $L1 $L2 $L3 -o movie.avi
$IFile $L4 $CC $5 $6
mencoder -ovc lavc $L0 $Pass1Args -oac $L1 $L2 $L3 -o movie.avi
$IFile $L4 $CC $5 $6
echo mencoder -ovc lavc $L0 $Pass2Args -oac $L1 $L2 $L3 -o movie.avi
$IFile $L4 $CC $5 $6
mencoder -ovc lavc $L0 $Pass2Args -oac $L1 $L2 $L3 -o movie.avi
$IFile $L4 $CC $5 $6
echo mv movie.avi new$IFile
mv movie.avi new$IFile
}
# Perform the 2pass encoding Video only!
function 2passEncodeVideo () {
BitRate=$1
#AUBR=$2
IFile=$2
L0=-lavcopts
L1=copy
#L2=-lameopts
#L3="vbr=3:br=$AUBR"
Codec="autoaspect:vcodec=mpeg4:vhq:vbitrate=$BitRate:vpass="
Pass1Args=${Codec}1
Pass2Args=${Codec}2
echo rm -f frameno.avi lavc_stats.txt divx2pass.log
rm -f frameno.avi lavc_stats.txt divx2pass.log
echo mencoder -ovc lavc $L0 $Pass1Args -oac $L1 -o movie.avi $IFile $4 $5 $6
mencoder -ovc lavc $L0 $Pass1Args -oac $L1 -o movie.avi $IFile $4 $5 $6
echo mencoder -ovc lavc $L0 $Pass2Args -oac $L1 -o movie.avi $IFile $4 $5 $6
mencoder -ovc lavc $L0 $Pass2Args -oac $L1 -o movie.avi $IFile $4 $5 $6
echo mv movie.avi new$IFile
mv movie.avi new$IFile
}
# Perform the 2pass encoding and rescale based on the given video code rating
function 2passShrinkEncode () {
Width=$1
Height=$2
BitRate=$3
AUBR=$4
IFile=$5
L0=-lavcopts
L1=mp3lame
L2=-lameopts
L3="vbr=3:br=$AUBR"
L4="-vop"
L5="scale=$Width:$Height"
# Added autoaspect
Codec="autoaspect:vcodec=mpeg4:vhq:vbitrate=$BitRate:vpass="
Pass1Args=${Codec}1
Pass2Args=${Codec}2
echo rm -f frameno.avi lavc_stats.txt divx2pass.log
rm -f frameno.avi lavc_stats.txt divx2pass.log
echo mencoder -ovc lavc $L0 $Pass1Args -oac $L1 $L2 $L3 $L4 $L5 -o
movie.avi $IFile
mencoder -ovc lavc $L0 $Pass1Args -oac $L1 $L2 $L3 $L4 $L5 -o movie.avi $IFile
echo mencoder -ovc lavc $L0 $Pass2Args -oac $L1 $L2 $L3 $L4 $L5 -o
movie.avi $IFile
mencoder -ovc lavc $L0 $Pass2Args -oac $L1 $L2 $L3 $L4 $L5 -o movie.avi $IFile
}
On 26 February 2014 16:14, Toby Corkindale <[email protected]> wrote:
> On 26 February 2014 13:05, Allan Duncan <[email protected]> wrote:
>> On 26/02/14 09:42, Carl Turney wrote:
>>> Hi All,
>>>
>>> Toby, thanks for that suggestion (below). However...
>>>
>>> Would like to try aconv, but don't have it installed. Tried searching
>>> for it using Synaptic Package Manager, and found nothing. Have got lots
>>> of repositories added to my system, including all the ones recommended
>>> by MediBuntu.
>>
>> That is possibly because avconv is but one binary in the libav suite.
>> Look at libav.org, or do
>> git clone git://git.libav.org/libav.git libav
>> or get one of the tar'd releases and compile it.
>
> On Ubuntu, avconv is packaged inside the libav-tools package.
> Although I don't know if you'll have that on a four-year-old
> distribution.. might be in backports somewhere?
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