This filter uses ff_set_common_all_samplerates(). Also don't overwrite outlink->sample_rate in config_output; it is harmless, because it is overwritten with the value it already had, but it is an API violation.
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| @@ -323,15 +323,6 @@ static int config_output(AVFilterLink *outlink) · 322 unmodified lines | ||
| 323 | 323 | AVFilterContext *ctx = outlink->src; |
| 324 | 324 | SidechainCompressContext *s = ctx->priv; |
| 325 | 325 | |
| 326 | − if (ctx->inputs[0]->sample_rate != ctx->inputs[1]->sample_rate) { | |
| 327 | − av_log(ctx, AV_LOG_ERROR, | |
| 328 | − "Inputs must have the same sample rate " | |
| 329 | − "%d for in0 vs %d for in1\n", | |
| 330 | − ctx->inputs[0]->sample_rate, ctx->inputs[1]->sample_rate); | |
| 331 | − return AVERROR(EINVAL); | |
| 332 | − } | |
| 333 | − | |
| 334 | − outlink->sample_rate = ctx->inputs[0]->sample_rate; | |
| 335 | 326 | outlink->time_base = ctx->inputs[0]->time_base; |
| 336 | 327 | |
| 337 | 328 | s->fifo[0] = av_audio_fifo_alloc(ctx->inputs[0]->format, ctx->inputs[0]->channels, 1024); |