[FFmpeg-trac] #4376(ffmpeg:new): FFmpeg amerge multi input create an output with a lower volume
FFmpeg
trac at avcodec.org
Thu Mar 19 19:49:07 CET 2015
#4376: FFmpeg amerge multi input create an output with a lower volume
-------------------------------------+-------------------------------------
Reporter: wouha | Type: defect
Status: new | Priority: important
Component: ffmpeg | Version: 2.6
Keywords: | Blocked By: low
filter_complex amerge volume | volume
Blocking: | Reproduced by developer: 1
Analyzed by developer: 1 |
-------------------------------------+-------------------------------------
Hello,
When I use -filter_complex & amerge to merge multiple audio files into one
audio file but the volume of output file is lower than what it should be!
(something like 2 or 3 times lower)
My ffmpeg command:
{{{
ffmpeg -i INPUT_1 -i INPUT_2 -i INPUT_3 -i INPUT_4 i INPUT_5 -i INPUT_6
-filter_complex "
[0:a]volume=volume=1:precision=fixed:eval=frame[a0];
[1:a]volume=volume=1:precision=fixed:eval=frame[a1];
[2:a]volume=volume=1:precision=fixed:eval=frame[a2];
[3:a]volume=volume=1:precision=fixed:eval=frame[a3];
[4:a]volume=volume=1:precision=fixed:eval=frame[a4];
[5:a]volume=volume=1:precision=fixed:eval=frame[a5];
[a0][a1][a2][a3][a4][a5]amerge=inputs=6,
pan=stereo|FL<c0+c2+c4+c6+c8+c10|FR<c1+c3+c5+c7+c9+c11[aout]"
-map "[aout]" -acodec libmp3lame -b:a 256k OUTPUT
}}}
I use FFmpeg 2.6.1 on Debian 3.2.63-2+deb7u1 x86_64
Can you help me about my problem?
Thank you a lot !
Best regards,
Max.
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Ticket URL: <https://trac.ffmpeg.org/ticket/4376>
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