From ad2b1edbd0d666a9df6421a9fb6cdfcff1a429eb Mon Sep 17 00:00:00 2001
From: Dean Lee <deanlee3@gmail.com>
Date: Mon, 10 Feb 2025 05:02:43 +0800
Subject: [PATCH] replay: flush codec buffers after seeking (#34556)

* flush codec buffers after seeking

* replace avio_seek with the higher-level avformat_seek_file

* exit early
---
 tools/replay/framereader.cc | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/replay/framereader.cc b/tools/replay/framereader.cc
index 26ef4684a..690645aca 100644
--- a/tools/replay/framereader.cc
+++ b/tools/replay/framereader.cc
@@ -177,7 +177,14 @@ bool VideoDecoder::decode(FrameReader *reader, int idx, VisionBuf *buf) {
         break;
       }
     }
-    avio_seek(reader->input_ctx->pb, reader->packets_info[from_idx].pos, SEEK_SET);
+
+    auto pos = reader->packets_info[from_idx].pos;
+    int ret = avformat_seek_file(reader->input_ctx, 0, pos, pos, pos, AVSEEK_FLAG_BYTE);
+    if (ret < 0) {
+      rError("Failed to seek to byte position %lld: %d", pos, AVERROR(ret));
+      return false;
+    }
+    avcodec_flush_buffers(decoder_ctx);
   }
   reader->prev_idx = idx;