[FFmpeg-trac] #9348(ffmpeg:new): volume=replaygain=track requires a + sign in front of positive values, but this is not standard replaygain spec
FFmpeg
trac at avcodec.org
Sun Jul 25 04:47:44 EEST 2021
#9348: volume=replaygain=track requires a + sign in front of positive values, but
this is not standard replaygain spec
-------------------------------------+----------------------------------
Reporter: simcc | Owner: (none)
Type: defect | Status: new
Priority: normal | Component: ffmpeg
Version: unspecified | Resolution:
Keywords: ReplayGain | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+----------------------------------
Description changed by simcc:
Old description:
> Summary of the bug:
> The RGv2 specification clearly mentions the format of the tags, and it
> should not contain a '+' char. Try any files with replay_track_gain tags
> with positive values, i.e. 9.70 will not work, but if you adjust the
> metadata manually to +9.70, then it does work.
> How to reproduce:
> {{{
> % ffmpeg -i input.m4a -af volume=replaygain=track output.m4a
>
> ffmpeg -i input.mp4 -c:v copy -af volume=replaygain=track output.mp4
>
> etc.
>
> ffmpeg version 4.4
> built on OSX w/ homebrew
> }}}
> Obviously the input file will need to have replay_track_gain tags with
> positive values for the bug to appear, i.e. nothing...it works as
> expected with negative values.
New description:
Summary of the bug:
The RGv2 specification clearly mentions the format of the tags, and it
should not contain a '+' char. Try any files with replay_track_gain tags
with positive values, i.e. 9.70 will not work, but if you adjust the
metadata manually to +9.70, then it does work.
How to reproduce:
{{{
% ffmpeg -i input.m4a -af volume=replaygain=track output.m4a
ffmpeg -i input.mp4 -c:v copy -af volume=replaygain=track output.mp4
etc.
ffmpeg version 4.4
built on OSX w/ homebrew
}}}
Obviously the input file will need to have replay_track_gain tags with
positive values for the bug to appear, i.e. nothing happens...it works as
expected with negative values.
--
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Ticket URL: <https://trac.ffmpeg.org/ticket/9348#comment:4>
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