What needs to be clarified
The task is to assess the grounds for interpreting the audio-video desynchronization, distinguishing observed features from their interpretation. The assessment must consider the suitability of each item and whether the grounds for the proposed conclusion can be checked.
Materials to prepare
- Original video container with audio and video streams
- Exported copy and transcoding information
- Complete report identifying events and time intervals
What to compare
Compare several visible and audible events across the recording for constant offset or increasing drift; compare timestamps, source file and exported version. Every significant feature is linked to a specific part of the material. Similarities and differences are assessed together, considering alternative explanations and the limitations of the examination method.
Possible outcome of the analysis
A possible deliverable is a review of the temporal mismatch’s causes, with verifiable examples and reasons for the assessment. Unresolved questions and additional examinations needed are stated separately, without promising an answer in advance.
Limits of the conclusions
Desynchronization alone does not prove speech replacement. Conclusions are confined to the examined items and stated conditions; insufficient features require an explicit finding that the relevant question cannot be resolved.