Video preview conversion

Component/part description

Convert input video into lower res video preview. For hypertranscript view.

Uses ffmpeg. Fluent ffmpeg.

Related projects

NA

Implementations Options considered

initially converted to ogg video. Quality was very poor, so moved to webm.

Then in previous implementation using NWJS this needs to be webm coz mp4 not supported. Issue is making it cross browser compatible. webm not supported by safari and iOS.

Current implementation

However with the recent move to Electron, was able to refactor and add support for mp4.

ffmpeg command

ffmpeg -i inputfile -vf "scale=-1:360" -c:v libx264 -preset ultrafast -crf 40 output.mp4

see component

autoEdit_2/lib/interactive_transcription_generator/video_to_html5/index.js at master · OpenNewsLabs/autoEdit_2GitHub

in textAV components

What needs refactoring

Seems quiet fast now.