From 73af0a3069671eeb8e531f51174978e6f4ee4a85 Mon Sep 17 00:00:00 2001
From: falsycat <me@falsy.cat>
Date: Thu, 8 Sep 2022 11:42:51 +0900
Subject: [PATCH] fix stego_fprob to skip empty frame

---
 conv/stego_fprob.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/conv/stego_fprob.cc b/conv/stego_fprob.cc
index ef81a8a..45815cd 100644
--- a/conv/stego_fprob.cc
+++ b/conv/stego_fprob.cc
@@ -289,8 +289,11 @@ static void Exec() {
 
       const auto ret = dec->DecodeFrameNoDelay(&nal[i], sz, yuv, &frame);
       Enforce(ret == 0, "frame decode failure");
+      i += sz;
 
       Frame cf = {yuv, frame};
+      if (cf.w == 0 || cf.h == 0) continue;
+
       const auto utf = fidx%ut;
       if (utf > 0) {
         EachFrame(utf, cf, pf);
@@ -298,7 +301,6 @@ static void Exec() {
       pf = std::move(cf);
 
       ++fidx;
-      i += sz;
     }
   }
 }