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-rw-r--r--src/lib/ffmpeg_decoder.cc8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/lib/ffmpeg_decoder.cc b/src/lib/ffmpeg_decoder.cc
index e90c33c80..810aa775b 100644
--- a/src/lib/ffmpeg_decoder.cc
+++ b/src/lib/ffmpeg_decoder.cc
@@ -97,6 +97,14 @@ FFmpegDecoder::FFmpegDecoder (shared_ptr<const FFmpegContent> c, shared_ptr<Log>
_pts_offset = - c->audio_stream()->first_audio.get();
}
+ /* If _pts_offset is positive we would be pushing things from a -ve PTS to be played.
+ I don't think we ever want to do that, as it seems things at -ve PTS are not meant
+ to be seen (use for alignment bars etc.); see mantis #418.
+ */
+ if (_pts_offset > 0) {
+ _pts_offset = 0;
+ }
+
/* Now adjust both so that the video pts starts on a frame */
if (have_video && have_audio) {
ContentTime first_video = c->first_video().get() + _pts_offset;