Upload the MPG file and the converter exposes a frame picker: every Nth frame, frames at explicit timestamps, or one frame per second. Each chosen frame is encoded as a separate TIFF file and bundled as a ZIP for download.
Frame extraction is fast — typically 20-30% of source duration on the standard pipeline. A 5-minute MPG -> TIFF bundle finishes in about 1 minute regardless of frame count, because the bottleneck is the TIFF encoder not the demuxer.