[FFmpeg-user] "sample_fmts", "all_channel_counts"

[Mark Filipak]

I created a .ac3 file containing 33 frames of silence (i.e. 1.376375
seconds) to later concat to the front of audio that was 33 frames early.

set _DELAY33_=1.376375
set _SILENCE2_=anullsrc=channel_layout=2:sample_rate=48000
set _TARGET_=<path\name>.ac3
ffmpeg -y -f lavfi -i %_SILENCE2_% -t %_DELAY33_% -c ac3 "%_TARGET_%"

I did get 33 frames of silence in a file. Good. But I also got these
complaints:

[out @ 0000000004a1a940] The "sample_fmts" option is deprecated: set the
supported sample formats
[out @ 0000000004a1a940] The "all_channel_counts" option is deprecated:
accept all channel counts

I did not use either of those deprecated options. And I do not
understand the end of either complaint.

Can anyone help?

--Mark.