Patch attached.
From 9c4cd60e2dd41cf98d693c8251f4cfade0807073 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <one...@gmail.com>
Date: Thu, 5 Jan 2023 13:40:12 +0100
Subject: [PATCH] libswresample/swresample: avoid s16p internal transfer format
Instead use float one by default for sample rate conversions.
The s16p internal transfer format produces visible and hearable
quantization artifacts.
Signed-off-by: Paul B Mahol <one...@gmail.com>
---
libswresample/swresample.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libswresample/swresample.c b/libswresample/swresample.c
index 5884f8d533..e6151bc335 100644
--- a/libswresample/swresample.c
+++ b/libswresample/swresample.c
@@ -318,7 +318,8 @@ av_cold int swr_init(struct SwrContext *s){
if(s->int_sample_fmt == AV_SAMPLE_FMT_NONE){
if( av_get_bytes_per_sample(s-> in_sample_fmt) <= 2
- && av_get_bytes_per_sample(s->out_sample_fmt) <= 2){
+ && av_get_bytes_per_sample(s->out_sample_fmt) <= 2
+ && s->out_sample_rate==s->in_sample_rate) {
s->int_sample_fmt= AV_SAMPLE_FMT_S16P;
}else if( av_get_bytes_per_sample(s-> in_sample_fmt) <= 2
&& !s->rematrix
--
2.37.2
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