Merge pull request #469 from arch1t3cht/end_of_stream_dist

Fixes to the minimum distance to end of stream when seeking

Author: myrsloik

src/core/videosource.cpp

@@ -919,12 +919,7 @@ bool FFMS_VideoSource::SeekTo(int n, int SeekOffset) {
         // Seeking too close to the end of the stream can result in a different decoder delay since
         // frames are returned as soon as draining starts, so avoid this to keep the delay predictable.
         // Is the +1 necessary here? Not sure, but let's keep it to be safe.
-        int EndOfStreamDist = CodecContext->has_b_frames + 1;
-
-        if (CodecContext->codec_id == AV_CODEC_ID_H264)
-            // Work around a bug in ffmpeg's h264 decoder where frames are skipped when seeking too
-            // close to the end in open-gop files: https://trac.ffmpeg.org/ticket/10936
-            EndOfStreamDist *= 2;
+        int EndOfStreamDist = Delay.ReorderDelay + Delay.ThreadDelay + 1;
 
         TargetFrame = std::min(TargetFrame, Frames.RealFrameNumber(std::max(0, VP.NumFrames - 1 - EndOfStreamDist)));