Unable to find the exact suspect.

Dale@: Could you please help in investigating this further or routing to appropriate owner.

Appreciate your help!

Hmm, looks like there are duplicate stream ids in that .mp4 file. Fix coming soon.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/41ecabf2dc6286a0cc529cfe50eabe44c3a56c54

commit 41ecabf2dc6286a0cc529cfe50eabe44c3a56c54
Author: servolk <servolk@chromium.org>
Date: Fri Oct 21 18:05:35 2016

Handle duplicate media track ids in FFmpegDemuxer

Previously we would just crash due to CHECK when we detected media
streams with duplicate bytestream ids. This CL adds explicit checks
for duplicate stream ids in FFmpegDemuxer and skips those streams.

BUG= 657437 

Review-Url: https://chromiumcodereview.appspot.com/2434383003
Cr-Commit-Position: refs/heads/master@{#426840}

[modify] https://crrev.com/41ecabf2dc6286a0cc529cfe50eabe44c3a56c54/media/filters/ffmpeg_demuxer.cc
[modify] https://crrev.com/41ecabf2dc6286a0cc529cfe50eabe44c3a56c54/media/filters/ffmpeg_demuxer_unittest.cc
[add] https://crrev.com/41ecabf2dc6286a0cc529cfe50eabe44c3a56c54/media/test/data/crbug657437.mp4

ClusterFuzz has detected this issue as fixed in range 426818:426932.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=4722304938672128

Fuzzer: ochang_media_mutator
Job Type: linux_asan_chrome_media
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  video_configs_.find(bytestream_track_id) == video_configs_.end() in media_tracks
  media::MediaTracks::AddVideoTrack
  media::FFmpegDemuxer::OnFindStreamInfoDone
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_asan_chrome_media&range=415934:416233
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_asan_chrome_media&range=426818:426932

Minimized Testcase (42.06 Kb): https://cluster-fuzz.appspot.com/download/AMIfv950zOCDZjgimAWsXjWqo7FXgVi6dKPtiVIAEp9DGs6M2BPUxl12QdSjvqTy9Njwy_TAPwMjZ8D2c1hx12KzzI51LByoKlwxliuDjHECTTA1X04RLh93KyUWscsmm6OgjAy1XJElIbMo5QfZujPKvrtfnfa6u1U9NayodpWc2DOPY6D3gU0?testcase_id=4722304938672128

See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

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