service_worker.service_worker failing on 7 builders

Builders failed on: 
- Android Nexus5 Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20Nexus5%20Perf
- Android Nexus5X Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20Nexus5X%20Perf
- Android Nexus5X WebView Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20Nexus5X%20WebView%20Perf
- Android Nexus6 Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20Nexus6%20Perf
- Android Nexus6 WebView Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20Nexus6%20WebView%20Perf
- Android Nexus7v2 Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20Nexus7v2%20Perf
- Android One Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20One%20Perf

Relevant stack trace:

Traceback (most recent call last):
  RunBenchmark at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/story_runner.py:332
    expectations=expectations, metadata=benchmark.GetMetadata())
  Run at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/story_runner.py:203
    _RunStoryAndProcessErrorIfNeeded(story, results, state, test)
  _RunStoryAndProcessErrorIfNeeded at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/story_runner.py:105
    state.RunStory(results)
  traced_function at /b/swarming/w/ir/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:52
    return func(*args, **kwargs)
  RunStory at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/page/shared_page_state.py:333
    self._current_page, self._current_tab, results)
  traced_function at /b/swarming/w/ir/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:75
    return func(*args, **kwargs)
  ValidateAndMeasurePage at /b/swarming/w/ir/tools/perf/benchmarks/service_worker.py:133
    self._speed_index.Stop(page, tab)
  Stop at /b/swarming/w/ir/tools/perf/metrics/speedindex.py:50
    self._impl.Stop(tab)
  Stop at /b/swarming/w/ir/tools/perf/metrics/speedindex.py:171
    for time, image in video_capture.GetVideoFrameIter()
  GetVideoFrameIter at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/image_processing/video.py:53
    for _, bmp in frame_generator:
  _FramesFromMp4 at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/image_processing/video.py:157
    dimensions = GetDimensions(mp4_file)
  GetDimensions at /b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/image_processing/video.py:132
    dimensions = map(int, dimensions.split()[0].split('x'))
ValueError: invalid literal for int() with base 10: 'bt470bg/bt470bg/smpte170m)'

(from https://chromium-swarm.appspot.com/task?id=388f93e28f6c4010&refresh=10&show_raw=1)

It seems this has been failing for a while, on different tests. horo@ or nednguyen@, any idea what's happening here?

It's also timing out on some platforms. Not sure what's happening there.