INTEGRATION_video_encoder fails on arm64, armhf debbuilds

[scpeters]

Environment

• OS Version: Ubuntu 18.04, 20.04 and Debian Buster
• Source or binary build?

debbuild of 3.11.0

Description

• Expected behavior: debbuild succeeds
• Actual behavior: debbuild fails due to failure of INTEGRATION_video_encoder test added in Added support for HW-accelerated video encoding. #125

The following tests FAILED:
	 43 - INTEGRATION_video_encoder (Failed)
Errors while running CTest

43/93 Test #43: INTEGRATION_video_encoder ...................***Failed    4.55 sec
Running main() from /var/lib/jenkins/workspace/ign-common3-debbuilder/build/ignition-common-3.11.0/test/gtest/src/gtest_main.cc
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from EncoderDecoderTest
[ RUN      ] EncoderDecoderTest.DecodeEncodeDecode
�[1;32m[Msg] �[0m�[1;32mCompatible SW encoder: �[0m�[1;32mlibx264�[0m�[1;32m�[0m
�[1;32m[Msg] �[0m�[1;32mUsing encoder �[0m�[1;32mlibx264�[0m�[1;32m�[0m
�[1;32m[Msg] �[0m�[1;32mFPS: �[0m�[1;32m42.2372�[0m�[1;32m�[0m
�[1;32m[Msg] �[0m�[1;32mFPS: �[0m�[1;32m40.6361�[0m�[1;32m�[0m
/var/lib/jenkins/workspace/ign-common3-debbuilder/build/ignition-common-3.11.0/test/integration/video_encoder.cc:135: Failure
The difference between avgIntensity2 and avgIntensity is 1.8609066972724975, which exceeds 1.0, where
avgIntensity2 evaluates to 222.84679089026915,
avgIntensity evaluates to 224.70769758754165, and
1.0 evaluates to 1.
[  FAILED  ] EncoderDecoderTest.DecodeEncodeDecode (3003 ms)
[----------] 1 test from EncoderDecoderTest (3004 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (3008 ms total)
[  PASSED  ] 0 tests.
[  FAILED  ] 1 test, listed below:
[  FAILED  ] EncoderDecoderTest.DecodeEncodeDecode

 1 FAILED TEST

Steps to reproduce

1. Build on arm64 or armhf system
2. Run ctest

Output

• https://build.osrfoundation.org/job/ign-common3-debbuilder/896/
• https://build.osrfoundation.org/job/ign-common3-debbuilder/898/
• https://build.osrfoundation.org/job/ign-common3-debbuilder/901/
• https://build.osrfoundation.org/job/ign-common3-debbuilder/907/
• https://build.osrfoundation.org/job/ign-common3-debbuilder/908/

[peci1]

Hmm... I wonder if doubling the intensity limit would be a non-flaky solution? The intensity tests were added mainly to prevent cases when the encoded video is completely wrong (all black, greenish film, stripes caused by wrong memory alignment)... so I think even raising the limit to 5 or 10 is okay (if I remember correctly, intensity here goes 0...255).