[IMPROVEMENT] Ignore version check on mxf essence container

[aipsvrr]

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{pull request content here}

[aipsvrr]

Hi, There is an issue when subtitles are present in mxf asset but couldn't extracted because defined in code mxf_caption_essence_container (MXF_CT_ANC) has version '9' and one from asset I met has another version. By ignoring version byte (in case of mxf) srt extracts successfully. So an idea of current PR is to ignore version of mxf caption essence container as it is allowed by smpte standard ("6.3 KLV Coding"): Note: SMPTE ST 336 specifies that KLV parsers can ignore the version number or use the version number as an additional guide and consistency check in the process of parsing a KLV Key. Thanks!

[cfsmp3]

LGTM but can you add it to the CHANGELOG as well? It's noteworthy.

[aipsvrr]

Hi @cfsmp3 , Sure! Changelog updated. Thanks!