Remote mpeg2 decoding at the start of a GOP, in addition to after a keyframe

This allows playing intra-refresh mpeg2 samples, and should hopefully limit
the amount of distortion it may allow to be shown after a seek to open-gop streams.

1 files changed, 3 insertions, 0 deletions

diff --git a/decoder/LAVVideo/decoders/avcodec.cpp b/decoder/LAVVideo/decoders/avcodec.cpp
index 5b5c44de..73e3a323 100644
--- a/decoder/LAVVideo/decoders/avcodec.cpp
+++ b/decoder/LAVVideo/decoders/avcodec.cpp
@@ -778,6 +778,9 @@ STDMETHODIMP CDecAvcodec::Decode(const BYTE *buffer, int buflen, REFERENCE_TIME
           if (state & STATE_EOS_FOUND) {
             bEndOfSequence = TRUE;
           }
+          if (state & STATE_GOP_FOUND && m_nCodecId == AV_CODEC_ID_MPEG2VIDEO) {
+            m_bWaitingForKeyFrame = FALSE;
+          }
         } else {
           avpkt.data = nullptr;
           avpkt.size = 0;