[FFmpeg-user] Batch Join multimono to multichannel Auido (wav / aif) - unwanted - bitrate change

[Luigi Rensinghoff]

Hi all
i have a little follow-up question....

I realized that with my command the audio-bitrate was changed from

16 to 24bit

Input Streams are all:

         Stream #0:0: Audio: pcm_s24be, 48000 Hz, mono, s32, 1152 kb/s

but the outputstream results in:

   
	Output #0, wav, to 'Park_City_Place_Quiet_6ch_24bit.wav':
  	Metadata:
    	ISFT            : Lavf55.19.104
    	Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 5.1, s16, 4608 kb/s (default)


i tried several things with b:a 24 and acodec .. but they all did not work

Any Ideas ??


Thanks Luigi


Am 09.07.2014 um 22:52 schrieb Luigi Rensinghoff <soundgigi at freenet.de>:

> Thanks
> 
> 
> i found the solution:
> 
> #!/bin/sh
> 
> for f in *C.aif;
> do
> 
> #echo "Processing $f"
> 
> 
> prefix=${f%}
> pre=`echo $prefix | sed 's/.\{6\}$//'`
> L=`echo $pre-\(L\).aif`
> R=`echo $pre-\(R\).aif`
> C=`echo $pre-C.aif`
> LFE=`echo $pre-\LFE\.aif`
> Ls=`echo $pre-S\(L\).aif`
> Rs=`echo $pre-S\(R\).aif`
> 
> out=`${pre}_6ch.wav`
> 
> ffmpeg -i $L -i $R -i $C -i $LFE -i $Ls -i $Rs -filter_complex "[0:a][1:a][2:a][3:a][4:a][5:a]amerge=inputs=6[aout]" -map "[aout]" ${f%-C.aif}_6ch.wav
> 
> rm $L
> rm $R
> rm $C
> rm $LFE
> rm $Ls
> rm $Rs
> 
> done
> 
> But i am sure it can be achieved more elegant - Suggestions ???
> 
> THX
> 
> 
> Am 09.07.2014 um 22:36 schrieb James Darnley <james.darnley at gmail.com>:
> 
>> On 2014-07-09 21:47, Luigi Rensinghoff wrote:
>>> I just don't know, how to use variables 
>>> 
>>> $f, f% and that shit - when to use what..
>> 
>> man bash will answer some of these questions.
>> 
>> $ is for variables.
>> $f is for the variable "f".
>> % can be used to remove text at the end of a variable.
>> {} these braces wrap the expansion you want bash to do, but are optional
>> in simple cases.
>> 
>>> -i „$f“.L.aif
>>> -i "$f“.R.aif 
>>> -i "$f“.C.aif 
>>> -i "$f“.LFE.aif 
>>> -i "$f“.Ls.aif 
>>> -i "$f“.Rs.aif 
>> 
>> Here is where you probably want: ${f%.C.aif}
>> 
>> This means: expand the variable "f" and remove ".C.aif" from the end.
>> 
>>> ${f%.aif}_6ch.wav
>> 
>> Here as well.
>> 
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> 
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