Volume Keyframe on Cut-ted Metastrip #55668

System Information
Replicated on multiple platforms.

Blender Version
Broken: 2.79b
Worked: unknown

Short description of error
When frequently cutting and dragging elementary strips, that gives frequent opportunities to lose audio-video synchronization, often enough without noticing that has occurred until after a while of editing. Depending on how much editing takes place after losing synchronization simply spamming undo may not be a feasible means of reversal and manual re-alignment can require excessive effort that a amateur might barely find themselves capable of, so meta-ing synchronized audio-&-video strips seems best practice however seems to disable keying in all resultant cut strips thereafter.

Whether this expected function or a bug seems unknown, however has persisted for as long as I have been using blender and I'm sure implementing keyframing inside cut meta-strips (if the functionality doesn't already exist and this isn't a bug) should be much simpler than implementing automatic audio-video re-sychronization of separated strips.

Despite never having seen another bug report or stack-question about this, I'm confident this is a widely-affectent issue and one I'm sure any novice exclusively using blender for video-editing would prioritize as an issue they would most appreciate see-ing resolved.

Exact steps for others to reproduce the error
After a meta-strip has been cut, tab to enter 'the later' meta-strip (beginning after the selected frame), select audio strip, then attempt to set a keyframe.

Error:
Could not insert keyframe, as RNA path is invalid for the given ID (ID = SCScene, sequence_editor.sequences_all["{$source-file-name}".002].volume)

Added subscriber: @eaterjolly

Added subscriber: @mont29

The problem comes from the naming of new strips inside the new meta strip - they are both (video and audio ones) named the same, this should never happen imho, and certainly will break unique RNA path any strip shall have. Will check.

This issue was referenced by bb98e83b99

Changed status from 'Open' to: 'Resolved'

This issue was referenced by c97794520f

This issue was referenced by 1ded3d2f7c

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Volume Keyframe on Cut-ted Metastrip #55668