From 962295cf1e4f7327cb7b843abdcee5c3a8fadabe Mon Sep 17 00:00:00 2001
From: arch1t3cht <arch1t3cht@gmail.com>
Date: Tue, 1 Nov 2022 00:15:57 +0100
Subject: [PATCH] vapoursynth: Fix offset in audio block's first frame

---
 src/audio_provider_vs.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/audio_provider_vs.cpp b/src/audio_provider_vs.cpp
index 37005d3c1..b41b46773 100644
--- a/src/audio_provider_vs.cpp
+++ b/src/audio_provider_vs.cpp
@@ -117,7 +117,7 @@ void VapoursynthAudioProvider::FillBufferWithFrame(void *buf, int n, int64_t sta
 
 	std::vector<const uint8_t *> planes(channels);
 	for (int c = 0; c < channels; c++) {
-		planes[c] = vs.GetAPI()->getReadPtr(frame, c);
+		planes[c] = vs.GetAPI()->getReadPtr(frame, c) + bytes_per_sample * start;
 		if (planes[c] == nullptr) {
 			vs.GetAPI()->freeFrame(frame);
 			throw VapoursynthError("Failed to read audio channel");