if (!all_frames.empty()) {
// We already had this cached in the database, so no need to look in the file.
for (const DB::FrameOnDiskAndStreamIdx &frame : all_frames) {
if (!all_frames.empty()) {
// We already had this cached in the database, so no need to look in the file.
for (const DB::FrameOnDiskAndStreamIdx &frame : all_frames) {