test content report should be clean

[rbouqueau]

The CTA-WAVE taskforce considers their remaining issues may come from the old iso segment validator limitations:

✗ ### error: moov-1:trak-1:mdia-1:minf-1:stbl-1:stsd-1
### ../src/ValidateBitStreams.cpp : 2965 : ### error: moov-1:trak-1:mdia-1:minf-1:stbl-1:stsd-1
### Validate_NAL_Unit_HEVC: Trailing zero bits not zero 1
✗ ### error: moov-1:trak-1:mdia-1:minf-1:stbl-1:stsd-1
### ../src/ValidateBitStreams.cpp : 3219 : ### error: moov-1:trak-1:mdia-1:minf-1:stbl-1:stsd-1
### Validate_NAL_Unit_HEVC: Trailing zero bits not zero 1
✓ ../src/ValidateAtoms.cpp : 4005 : colr atom of type nclx found, the software does not handle colr atoms of this type.
! ../src/ValidateAtomList.cpp : 2331 : WARNING: In moov-1:udta-1 - unknown/unexpected atom 'meta'
✓ According to DASH-IF IOP Section 3.2.8 @bandwidth of the Representation (8000000 bps) is set too high given the @minimumBufferTime (2.000000 s), the minimum @bandwidth value required to conform is 7064865 bps.

A good validation test with the new segment validation would be to pass this content. We have some in the test suite already if I'm not mistaken.

To reproduce:

• https://staging.conformance.dashif.org/
• https://dash-large-files.akamaized.net/WAVE/vectors/chh1_sets/12.5_25_50/t1/2025-01-15/stream.mpd

cta-wave/Test-Content-Generation#55