| Metric | Definition | |--------|------------| | | Mean absolute difference (ms) between original and converted timestamps. | | Style preservation | Percentage of style attributes that survive the mapping (e.g., colour, bold). | | Processing time | Average CPU seconds per file (single‑core). | | Error rate | Number of files requiring manual correction after conversion. |
| SSA Attribute | WebVTT Mapping | SRT Mapping (as comment) | |---------------|----------------|--------------------------| | PrimaryColour ( &HBBGGRR ) | color: #RRGGBB; | #color=RRGGBB | | BackColour | background-color: #RRGGBB; | #bgcolor=RRGGBB | | Bold , Italic , Underline | CSS font-weight , font-style , text-decoration | Inline tags ( <b> , <i> , <u> ) | | Outline / Shadow | text-shadow | Ignored (SRT lacks visual styling) | | Karaoke tags ( k... ) | vtt voice cue via <c.karaoke> class | Not supported – stripped with warning | hsoda030engsub convert021021 min upd
Unprocessed video files are usually too large for fluid web streaming. The server pushes the asset through a transcoding engine to change codecs (e.g., converting ProRes to H.264). The inclusion of convert021021 serves as a permanent version checkpoint for the engineering team, noting that the encoding profile was executed or revised on that specific date. 3. Asset Minimization and Delta Updates | Metric | Definition | |--------|------------| | |
mediainfo hsoda030engsub_convert021021_min_upd.mp4 | grep -E "Overall bit rate|Writing library" | | Error rate | Number of files