---
doc/muxers.texi | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/doc/muxers.texi b/doc/muxers.texi
index 0aaef2b520..ccbb741992 100644
--- a/doc/muxers.texi
+++ b/doc/muxers.texi
@@ -1556,6 +1556,36 @@ ffmpeg -re -i ... -c:v libx264 -c:a aac -f fifo
-fifo_format flv \
-map 0:v -map 0:a rtmp://example.com/live/stream_name
@end example
+@anchor{fifo_test}
+@section fifo_test
+@ref{fifo} muxer test muxer.
+
+This is a testing muxer, it is supposed to be used only to test the
+@ref{fifo} muxer.
+
+@subsection Options
+@table @option
+@item print_deinit_summary @var{bool}
+print summary when deinitializing muxer, default is @code{true}
+
+@item write_header_ret @var{int}
+set @code{write_header()} return value
+
+@item write_trailer_ret @var{int}
+set @code{write_trailer()} return value
+@end table
+
+@subsection Example
+
+Use @command{ffmpeg} to write to a file using the @samp{fifo} muxer
+using the internal @samp{fifo_test} muxer, simulate a write header
+error using the @option{write_header_ret} option:
+@example
+ffmpeg -re -i ... -c:v libx264 -c:a aac -f fifo -fifo_format fifo_test
-format_opts write_header_ret=-22 \
+ -map 0:v -map 0:a \
+ -drop_pkts_on_overflow 1 -attempt_recovery 1 -recovery_wait_time 1 out.test
+@end example
+
@section flv
Adobe Flash Video Format muxer.
--
2.34.1
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