Ignore start time values matching kNoTimestamp.

media/filters/ffmpeg_demuxer.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/filters/ffmpeg_demuxer.h"
 
 #include <algorithm>
 #include <memory>
 #include <set>
 #include <utility>
@@ skipping 1217 matching lines @@
       format_context->start_time != static_cast<int64_t>(AV_NOPTS_VALUE)) {
     struct AVPacketList* packet_buffer = internal->packet_buffer;
     while (packet_buffer != internal->packet_buffer_end) {
       DCHECK_LT(static_cast<size_t>(packet_buffer->pkt.stream_index),
                 start_time_estimates.size());
       const AVStream* stream =
           format_context->streams[packet_buffer->pkt.stream_index];
       if (packet_buffer->pkt.pts != static_cast<int64_t>(AV_NOPTS_VALUE)) {
         const base::TimeDelta packet_pts =
             ConvertFromTimeBase(stream->time_base, packet_buffer->pkt.pts);
-        if (packet_pts < start_time_estimates[stream->index])
+        // We ignore kNoTimestamp here since -int64_t::min() is possible; see
+        // https://crbug.com/700501. Technically this is a valid value, but in
+        // practice shouldn't occur, so just ignore it when estimating.
+        if (packet_pts != kNoTimestamp && packet_pts != kInfiniteDuration &&
+            packet_pts < start_time_estimates[stream->index]) {
           start_time_estimates[stream->index] = packet_pts;
+        }
       }
       packet_buffer = packet_buffer->next;
     }
   }
 
   std::unique_ptr<MediaTracks> media_tracks(new MediaTracks());
 
   DCHECK(track_id_to_demux_stream_map_.empty());
 
   // If available, |start_time_| will be set to the lowest stream start time.
@@ skipping 597 matching lines @@
 
 void FFmpegDemuxer::SetLiveness(DemuxerStream::Liveness liveness) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   for (const auto& stream : streams_) {
     if (stream)
       stream->SetLiveness(liveness);
   }
 }
 
 }  // namespace media