examples/decode_filter_audio: Add loop for draining the filtergraph

Depending on the filters used, the filtergraph may produce trailing data
after feeding it the last input frame. Update the example to include the
necessary loop for draining the filtergraph.

Reviewed-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Tobias Rapp <t.rapp@noa-archive.com>
release/7.1
Tobias Rapp 10 months ago
parent 94ebe604b0
commit 55ce666062
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