What is the actual state of the ebur128 filter? Is just 48kHz still
implemented or are there more sampling rates implemented since 2013?
From a quick look at the libavfilter/v_ebur128.c source file it seems
like indeed the filter is only designed for 48kHz and internal
re-sampling occurs if you feed an input file with different sample rate.
Maybe you just try it with e.g. 44.1kHz and check with "-loglevel
debug" for an auto-inserted resampling filter?
Thank you Tobias,
indeed it is just for 48kHz.
Part of the comandline output from via debug-loglevel
[Parsed_ebur128_0 @ 00000000003eff20] auto-inserting filter
'auto-inserted resampler 0' between the filter 'graph 0 input from
stream 0:0' and the filter 'Parsed_ebur128_0'
[audio format for output stream 0:0 @ 0000000005358f40] auto-inserting
filter 'auto-inserted resampler 1' between the filter 'Parsed_ebur128_0'
and the filter 'audio format for output stream 0:0'
[AVFilterGraph @ 000000000542c440] query_formats: 4 queried, 3 merged, 6
already done, 0 delayed
[auto-inserted resampler 0 @ 00000000003a8640] ch:2 chl:stereo fmt:s32
r:44100Hz -> ch:2 chl:stereo fmt:dbl r:48000Hz
[SWR @ 000000000039d460] Using double precision mode
[auto-inserted resampler 1 @ 00000000003b0660] [SWR @ 0000000000398f00]
Using double precision mode
[auto-inserted resampler 1 @ 00000000003b0660] ch:2 chl:stereo fmt:dbl
r:48000Hz -> ch:2 chl:stereo fmt:s16 r:48000Hz
Best
Regards
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