dot-audio_concat_filter: Build the filter graph for audio_concat

In compost: Video Compositing via 'FFmpeg'

Build the filter graph for audio_concat

Description

Pure string builder so the graph can be tested without ffmpeg. Each input is normalized (aresample + aformat) to the common rate and layout; gaps and the tail are anullsrc sources trimmed to length; everything runs through one concat filter to [aout].

Usage

.audio_concat_filter(n, gap, tail, sample_rate, channels)

Arguments

n	Number of inputs.
gap	Silence between consecutive inputs, seconds.
tail	Silence after the last input, seconds.
sample_rate	Common sample rate in Hz.
channels	Common channel count (1 or 2).

Value

The filter_complex string.

compost documentation built on Aug. 4, 2026, 5:11 p.m.