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-rw-r--r--NEWS2
-rw-r--r--src/decoder/FfmpegDecoderPlugin.cxx11
2 files changed, 9 insertions, 4 deletions
diff --git a/NEWS b/NEWS
index 18e8a0c28..40df6aed9 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,6 @@
ver 0.18.21 (not yet released)
+* decoder
+ - ffmpeg: fix time stamp underflow
ver 0.18.20 (2014/12/08)
* decoder
diff --git a/src/decoder/FfmpegDecoderPlugin.cxx b/src/decoder/FfmpegDecoderPlugin.cxx
index 8a0937903..9a00bf3c4 100644
--- a/src/decoder/FfmpegDecoderPlugin.cxx
+++ b/src/decoder/FfmpegDecoderPlugin.cxx
@@ -284,10 +284,13 @@ ffmpeg_send_packet(Decoder &decoder, InputStream &is,
AVFrame *frame,
uint8_t **buffer, int *buffer_size)
{
- if (packet->pts >= 0 && packet->pts != (int64_t)AV_NOPTS_VALUE)
- decoder_timestamp(decoder,
- time_from_ffmpeg(packet->pts - start_time_fallback(*stream),
- stream->time_base));
+ if (packet->pts >= 0 && packet->pts != (int64_t)AV_NOPTS_VALUE) {
+ auto start = start_time_fallback(*stream);
+ if (packet->pts >= start)
+ decoder_timestamp(decoder,
+ time_from_ffmpeg(packet->pts - start,
+ stream->time_base));
+ }
AVPacket packet2 = *packet;