web: core system for queue & queen bee, move remux to new system

it's 3 am and i think i had a divine intervention

web/i18n/en/receiver.json

@@ -1,5 +1,7 @@
 {
     "title": "drag or select a file",
+    "title.multiple": "drag or select files",
     "title.drop": "drop the file here!",
+    "title.drop.multiple": "drop the files here!",
     "accept": "supported formats: {{ formats }}."
 }

web/src/components/misc/DropReceiver.svelte

@@ -3,19 +3,20 @@
     export let classes = "";
 
     export let draggedOver = false;
-    export let file: File | undefined;
+    export let files: FileList | undefined;
 
     const dropHandler = async (ev: DragEvent) => {
         draggedOver = false;
         ev.preventDefault();
 
-        if (ev?.dataTransfer?.files.length === 1) {
+        if (ev?.dataTransfer?.files && ev?.dataTransfer?.files.length > 0) {
-            file = ev.dataTransfer.files[0];
+            files = ev.dataTransfer.files;
-            return file;
+            return files;
         }
     };
 
     const dragOverHandler = (ev: DragEvent) => {
+        console.log("dragged over omg")
         draggedOver = true;
         ev.preventDefault();
     };
@@ -25,6 +26,7 @@
     {id}
     class={classes}
     role="region"
+    aria-hidden="true"
     on:drop={(ev) => dropHandler(ev)}
     on:dragover={(ev) => dragOverHandler(ev)}
     on:dragend={() => {

web/src/components/misc/FileReceiver.svelte

@@ -5,22 +5,33 @@
     import IconFileImport from "@tabler/icons-svelte/IconFileImport.svelte";
     import IconUpload from "@tabler/icons-svelte/IconUpload.svelte";
 
-    export let file: File | undefined;
+    export let files: FileList | undefined;
     export let draggedOver = false;
     export let acceptTypes: string[];
     export let acceptExtensions: string[];
+    export let maxFileNumber: number = 100;
+
+    let selectorStringMultiple = maxFileNumber > 1 ? ".multiple" : "";
 
     let fileInput: HTMLInputElement;
+
     const openFile = async () => {
         fileInput = document.createElement("input");
         fileInput.type = "file";
         fileInput.accept = acceptTypes.join(",");
 
+        if (maxFileNumber > 1) {
+            fileInput.multiple = true;
+        }
+
         fileInput.click();
         fileInput.onchange = async () => {
-            if (fileInput.files?.length === 1) {
+            let userFiles = fileInput?.files;
-                file = fileInput.files[0];
+            if (userFiles && userFiles.length >= 1) {
-                return file;
+                if (userFiles.length > maxFileNumber) {
+                    return alert("too many files, limit is " + maxFileNumber);
+                }
+                return files = userFiles;
             }
         };
     };
@@ -47,9 +58,9 @@
         <div class="open-file-text">
             <div class="open-title">
                 {#if draggedOver}
-                    {$t("receiver.title.drop")}
+                    {$t("receiver.title.drop" + selectorStringMultiple)}
                 {:else}
-                    {$t("receiver.title")}
+                    {$t("receiver.title" + selectorStringMultiple)}
                 {/if}
             </div>
             <div class="subtext accept-list">

web/src/components/queue/ProcessingQueue.svelte

@@ -2,11 +2,10 @@
     import { t } from "$lib/i18n/translations";
     import { onNavigate } from "$app/navigation";
 
-    import settings from "$lib/state/settings";
+    import { clearQueue, queue } from "$lib/state/queen-bee/queue";
-    import { addToQueue, nukeEntireQueue, queue } from "$lib/state/queue";
 
     import type { SvelteComponent } from "svelte";
-    import type { QueueItem } from "$lib/types/queue";
+    import type { CobaltQueueItem } from "$lib/types/queue";
 
     import SectionHeading from "$components/misc/SectionHeading.svelte";
     import PopoverContainer from "$components/misc/PopoverContainer.svelte";
@@ -15,47 +14,24 @@
     import ProcessingQueueStub from "$components/queue/ProcessingQueueStub.svelte";
 
     import IconX from "@tabler/icons-svelte/IconX.svelte";
-    import IconPlus from "@tabler/icons-svelte/IconPlus.svelte";
+    import { currentTasks } from "$lib/state/queen-bee/current-tasks";
-
-    import IconGif from "@tabler/icons-svelte/IconGif.svelte";
-    import IconMovie from "@tabler/icons-svelte/IconMovie.svelte";
-    import IconMusic from "@tabler/icons-svelte/IconMusic.svelte";
-    import IconPhoto from "@tabler/icons-svelte/IconPhoto.svelte";
-    import IconVolume3 from "@tabler/icons-svelte/IconVolume3.svelte";
 
     let popover: SvelteComponent;
     $: expanded = false;
 
-    $: queueItems = Object.entries($queue) as [id: string, item: QueueItem][];
+    $: queueItems = Object.entries($queue) as [
+        id: string,
+        item: CobaltQueueItem,
+    ][];
 
     $: queueLength = Object.keys($queue).length;
+    $: completedQueueItems = queueItems.filter(([id, item]) => {
+        return item.state === "done"
+    }).length;
+
+    // TODO: toggle this only when progress is unknown
     $: indeterminate = false;
 
-    const itemIcons = {
-        video: IconMovie,
-        video_mute: IconVolume3,
-        audio: IconMusic,
-        audio_convert: IconMusic,
-        image: IconPhoto,
-        gif: IconGif,
-    };
-
-    const addFakeQueueItem = () => {
-        return addToQueue({
-            id: crypto.randomUUID(),
-            status: "waiting",
-            type: "video",
-            filename: "test.mp4",
-            files: [
-                {
-                    type: "video",
-                    url: "https://",
-                },
-            ],
-            processingSteps: [],
-        });
-    };
-
     const popoverAction = async () => {
         expanded = !expanded;
     };
@@ -66,7 +42,7 @@
 </script>
 
 <div id="processing-queue" class:expanded>
-    <ProcessingStatus {indeterminate} expandAction={popover?.showPopover} />
+    <ProcessingStatus progress={(completedQueueItems / queueLength) * 100} {indeterminate} expandAction={popover?.showPopover} />
 
     <PopoverContainer
         bind:this={popover}
@@ -84,27 +60,21 @@
             />
             <div class="header-buttons">
                 {#if queueLength > 0}
-                    <button class="clear-button" on:click={nukeEntireQueue}>
+                    <button class="clear-button" on:click={clearQueue}>
                         <IconX />
                         {$t("button.clear")}
                     </button>
                 {/if}
-                <!-- button for ui debug -->
-                {#if $settings.advanced.debug}
-                    <button class="test-button" on:click={addFakeQueueItem}>
-                        <IconPlus />
-                        add item
-                    </button>
-                {/if}
             </div>
         </div>
         <div id="processing-list">
             {#each queueItems as [id, item]}
                 <ProcessingQueueItem
                     {id}
+                    mediaType={item.mediaType}
                     filename={item.filename}
-                    status={item.status}
+                    state={item.state}
-                    icon={itemIcons[item.type]}
+                    resultFile={item.state === "done" ? item.resultFile : undefined}
                 />
             {/each}
             {#if queueLength === 0}

web/src/components/queue/ProcessingQueueItem.svelte

@@ -1,41 +1,67 @@
 <script lang="ts">
+    import { queue, removeItem } from "$lib/state/queen-bee/queue";
+
     import IconX from "@tabler/icons-svelte/IconX.svelte";
     import IconDownload from "@tabler/icons-svelte/IconDownload.svelte";
-    import { removeFromQueue } from "$lib/state/queue";
+
+    import IconMovie from "@tabler/icons-svelte/IconMovie.svelte";
+    import IconMusic from "@tabler/icons-svelte/IconMusic.svelte";
+    import IconPhoto from "@tabler/icons-svelte/IconPhoto.svelte";
+    import { downloadFile } from "$lib/download";
+    import type { CobaltQueueItemState } from "$lib/types/queue";
+    import type { CobaltPipelineResultFileType } from "$lib/types/workers";
+
+    const itemIcons = {
+        video: IconMovie,
+        audio: IconMusic,
+        image: IconPhoto,
+    };
 
     export let id: string;
+    export let mediaType: CobaltPipelineResultFileType;
     export let filename: string;
-    export let status: string;
+    export let state: CobaltQueueItemState;
-    export let progress: number = 0;
+    export let resultFile: File | undefined;
-    export let icon: ConstructorOfATypedSvelteComponent;
+
+    // TODO: use a real value
+    const progress = 0;
+
+    const download = (file: File) =>
+        downloadFile({
+            file,
+        });
 </script>
 
 <div class="processing-item">
     <div class="processing-info">
         <div class="file-title">
             <div class="processing-type">
-                <svelte:component this={icon} />
+                <svelte:component this={itemIcons[mediaType]} />
             </div>
             <span>
                 {filename}
             </span>
         </div>
-        <div class="file-progress">
+        {#if state === "running"}
-            <div
+            <div class="file-progress">
-                class="progress"
+                <div
-                style="width: {Math.min(100, progress)}%"
+                    class="progress"
-            ></div>
+                    style="width: {Math.min(100, progress)}%"
-        </div>
+                ></div>
-        <div class="file-status">{id}: {status}</div>
+            </div>
+        {/if}
+        <div class="file-status">{id}: {state}</div>
     </div>
     <div class="file-actions">
-        <button class="action-button">
+        {#if state === "done" && resultFile}
-            <IconDownload />
+            <button
-        </button>
+                class="action-button"
-        <button
+                on:click={() => download(resultFile)}
-            class="action-button"
+            >
-            on:click={() => removeFromQueue(id)}
+                <IconDownload />
-        >
+            </button>
+        {/if}
+        <button class="action-button" on:click={() => removeItem(id)}>
             <IconX />
         </button>
     </div>

web/src/lib/queen-bee/queue.ts

@@ -0,0 +1,36 @@
+import { addItem } from "$lib/state/queen-bee/queue";
+import type { CobaltPipelineItem } from "$lib/types/workers";
+
+export const getMediaType = (type: string) => {
+    const kind = type.split('/')[0];
+
+    // can't use .includes() here for some reason
+    if (kind === "video" || kind === "audio" || kind === "image") {
+        return kind;
+    }
+}
+
+export const createRemuxPipeline = (file: File) => {
+    // chopped khia
+    const parentId = crypto.randomUUID();
+    const mediaType = getMediaType(file.type);
+
+    const pipeline: CobaltPipelineItem[] = [{
+        worker: "remux",
+        workerId: crypto.randomUUID(),
+        parentId,
+        workerArgs: {
+            files: [file],
+        },
+    }];
+
+    if (mediaType) {
+        addItem({
+            id: parentId,
+            state: "waiting",
+            pipeline,
+            filename: file.name,
+            mediaType,
+        })
+    }
+}

web/src/lib/queen-bee/run-worker.ts

@@ -0,0 +1,60 @@
+import RemuxWorker from "$lib/workers/remux?worker";
+//import RemoveBgWorker from "$lib/workers/removebg?worker";
+
+import type { CobaltPipelineItem } from "$lib/types/workers";
+import { itemDone, itemError } from "$lib/state/queen-bee/queue";
+
+const workerError = (parentId: string, workerId: string, worker: Worker, error: string) => {
+    itemError(parentId, workerId, error);
+    worker.terminate();
+}
+
+const workerSuccess = (parentId: string, workerId: string, worker: Worker, file: File) => {
+    itemDone(parentId, workerId, file);
+    worker.terminate();
+}
+
+export const runRemuxWorker = async (workerId: string, parentId: string, file: File) => {
+    const worker = new RemuxWorker();
+
+    worker.postMessage({ file });
+
+    worker.onerror = (e) => {
+        console.error("remux worker exploded:", e);
+
+        // TODO: proper error code
+        workerError(parentId, workerId, worker, "internal error");
+    };
+
+    worker.onmessage = (event) => {
+        const eventData = event.data.cobaltRemuxWorker;
+        if (!eventData) return;
+
+        console.log(eventData);
+
+        // TODO: calculate & use progress again
+
+        if (eventData.render) {
+            return workerSuccess(
+                parentId,
+                workerId,
+                worker,
+                new File([eventData.render], eventData.filename, {
+                    type: eventData.render.type,
+                })
+            );
+        }
+
+        if (eventData.error) {
+            return workerError(parentId, workerId, worker, eventData.error);
+        }
+    };
+}
+
+export const startWorker = async ({ worker, workerId, parentId, workerArgs }: CobaltPipelineItem) => {
+    switch (worker) {
+        case "remux":
+            await runRemuxWorker(workerId, parentId, workerArgs.files[0]);
+            break;
+    }
+}

web/src/lib/queen-bee/scheduler.ts

@@ -0,0 +1,41 @@
+import { get } from "svelte/store";
+import { itemRunning, queue } from "$lib/state/queen-bee/queue";
+import { startWorker } from "$lib/queen-bee/run-worker";
+import { addWorkerToQueue, currentTasks } from "$lib/state/queen-bee/current-tasks";
+
+export const checkTasks = () => {
+    const queueItems = get(queue);
+    const ongoingTasks = get(currentTasks)
+
+    if (Object.keys(ongoingTasks).length > 0) return;
+
+    for (const item of Object.keys(queueItems)) {
+        const task = queueItems[item];
+
+        if (task.state === "running") {
+            break;
+        }
+
+        if (task.state === "waiting") {
+            for (let i = 0; i < task.pipeline.length; i++) {
+                // TODO: loop here and pass the file between pipelines
+                // or schedule several tasks one after another but within
+                // one parent & pipeline
+                const pipelineItem = task.pipeline[i];
+
+                startWorker(pipelineItem);
+
+                addWorkerToQueue({
+                    id: pipelineItem.workerId,
+                    parentId: task.id,
+                    step: i + 1,
+                    totalSteps: task.pipeline.length,
+                });
+
+                itemRunning(task.id, i);
+                break;
+            }
+            break;
+        }
+    }
+}

web/src/lib/state/queen-bee/current-tasks.ts

@@ -0,0 +1,40 @@
+import { readable, type Updater } from "svelte/store";
+
+import type { CobaltWorkerProgress } from "$lib/types/workers";
+import type { CobaltCurrentTasks, CobaltCurrentTaskItem } from "$lib/types/queen-bee";
+
+let update: (_: Updater<CobaltCurrentTasks>) => void;
+
+const currentTasks = readable<CobaltCurrentTasks>(
+    {},
+    (_, _update) => { update = _update }
+);
+
+export function addWorkerToQueue(item: CobaltCurrentTaskItem) {
+    update(tasks => {
+        tasks[item.id] = item;
+        return tasks;
+    });
+}
+
+export function removeWorkerFromQueue(id: string) {
+    update(tasks => {
+        delete tasks[id];
+        return tasks;
+    });
+}
+
+export function updateWorkerProgress(id: string, progress: CobaltWorkerProgress) {
+    update(tasks => {
+        tasks[id].progress = progress;
+        return tasks;
+    });
+}
+
+export function clearQueue() {
+    update(() => {
+        return {};
+    });
+}
+
+export { currentTasks };

web/src/lib/state/queen-bee/queue.ts

@@ -0,0 +1,84 @@
+import { readable, type Updater } from "svelte/store";
+import type { CobaltQueue, CobaltQueueItem } from "$lib/types/queue";
+import { checkTasks } from "$lib/queen-bee/scheduler";
+import { removeWorkerFromQueue } from "./current-tasks";
+
+let update: (_: Updater<CobaltQueue>) => void;
+
+const queue = readable<CobaltQueue>(
+    {},
+    (_, _update) => { update = _update }
+);
+
+export function addItem(item: CobaltQueueItem) {
+    update(queueData => {
+        queueData[item.id] = item;
+        return queueData;
+    });
+
+    checkTasks();
+}
+
+export function itemError(id: string, workerId: string, error: string) {
+    update(queueData => {
+        if (queueData[id]) {
+            queueData[id] = {
+                ...queueData[id],
+                state: "error",
+                errorCode: error,
+            }
+        }
+        return queueData;
+    });
+
+    removeWorkerFromQueue(workerId);
+    checkTasks();
+}
+
+export function itemDone(id: string, workerId: string, file: File) {
+    update(queueData => {
+        if (queueData[id]) {
+            queueData[id] = {
+                ...queueData[id],
+                state: "done",
+                resultFile: file,
+            }
+        }
+        return queueData;
+    });
+
+    removeWorkerFromQueue(workerId);
+    checkTasks();
+}
+
+export function itemRunning(id: string, step: number) {
+    update(queueData => {
+        if (queueData[id]) {
+            queueData[id] = {
+                ...queueData[id],
+                state: "running",
+                currentStep: step,
+            }
+        }
+        return queueData;
+    });
+
+    checkTasks();
+}
+
+export function removeItem(id: string) {
+    update(queueData => {
+        delete queueData[id];
+        return queueData;
+    });
+
+    checkTasks();
+}
+
+export function clearQueue() {
+    update(() => {
+        return {};
+    });
+}
+
+export { queue };

web/src/lib/state/queue.ts

@@ -1,70 +0,0 @@
-import { merge } from "ts-deepmerge";
-import { get, readable, type Updater } from "svelte/store";
-import type { OngoingQueueItem, QueueItem } from "$lib/types/queue";
-
-type Queue = {
-    [id: string]: QueueItem;
-}
-
-type OngoingQueue = {
-    [id: string]: OngoingQueueItem;
-}
-
-let update: (_: Updater<Queue>) => void;
-
-const queue = readable<Queue>(
-    {},
-    (_, _update) => { update = _update }
-);
-
-export function addToQueue(item: QueueItem) {
-    update(queueData => {
-        queueData[item.id] = item;
-        return queueData;
-    });
-}
-
-export function removeFromQueue(id: string) {
-    update(queueData => {
-        delete queueData[id];
-        return queueData;
-    });
-}
-
-let updateOngoing: (_: Updater<OngoingQueue>) => void;
-
-const ongoingQueue = readable<OngoingQueue>(
-    {},
-    (_, _update) => { updateOngoing = _update }
-);
-
-export function updateOngoingQueue(id: string, itemInfo: Partial<OngoingQueueItem> = {}) {
-    updateOngoing(queueData => {
-        if (get(queue)?.id) {
-            queueData[id] = merge(queueData[id], {
-                id,
-                ...itemInfo,
-            });
-        }
-
-        return queueData;
-    });
-}
-
-export function removeFromOngoingQueue(id: string) {
-    updateOngoing(queue => {
-        delete queue[id];
-        return queue;
-    });
-}
-
-export function nukeEntireQueue() {
-    update(() => {
-        return {};
-    });
-    updateOngoing(() => {
-        return {};
-    });
-}
-
-export { queue, ongoingQueue };

web/src/lib/types/queen-bee.ts

@@ -0,0 +1,13 @@
+import type { CobaltWorkerProgress } from "$lib/types/workers";
+
+export type CobaltCurrentTaskItem = {
+    id: string,
+    parentId: string, // parent id is queue id to which this pipeline worker belongs to
+    step: number,
+    totalSteps: number,
+    progress?: CobaltWorkerProgress,
+}
+
+export type CobaltCurrentTasks = {
+    [id: string]: CobaltCurrentTaskItem,
+}

web/src/lib/types/queue.ts

@@ -1,34 +1,37 @@
-type ProcessingStep = "mux" | "mux_hls" | "encode";
+import type { CobaltPipelineItem, CobaltPipelineResultFileType } from "$lib/types/workers";
-type ProcessingPreset = "mp4" | "webm" | "copy";
-type ProcessingState = "completed" | "failed" | "canceled" | "waiting" | "downloading" | "muxing" | "converting";
-type ProcessingType = "video" | "video_mute" | "audio" | "audio_convert" | "image" | "gif";
-type QueueFileType = "video" | "audio" | "image" | "gif";
 
-export type ProcessingStepItem = {
+export type CobaltQueueItemState = "waiting" | "running" | "done" | "error";
-    type: ProcessingStep,
-    preset?: ProcessingPreset,
-}
 
-export type QueueFile = {
+export type CobaltQueueBaseItem = {
-    type: QueueFileType,
-    url: string,
-}
-
-export type QueueItem = {
     id: string,
-    status: ProcessingState,
+    state: CobaltQueueItemState,
-    type: ProcessingType,
+    pipeline: CobaltPipelineItem[],
+    // TODO: metadata
     filename: string,
-    files: QueueFile[],
+    mediaType: CobaltPipelineResultFileType,
-    processingSteps: ProcessingStepItem[],
+};
-}
 
-export type OngoingQueueItem = {
+export type CobaltQueueItemWaiting = CobaltQueueBaseItem & {
-    id: string,
+    state: "waiting",
-    currentStep?: ProcessingStep,
+};
-    size?: {
+
-        expected: number,
+export type CobaltQueueItemRunning = CobaltQueueBaseItem & {
-        current: number,
+    state: "running",
-    },
+    currentStep: number,
-    speed?: number,
+};
-}
+
+export type CobaltQueueItemDone = CobaltQueueBaseItem & {
+    state: "done",
+    resultFile: File,
+};
+
+export type CobaltQueueItemError = CobaltQueueBaseItem & {
+    state: "error",
+    errorCode: string,
+};
+
+export type CobaltQueueItem = CobaltQueueItemWaiting | CobaltQueueItemRunning | CobaltQueueItemDone | CobaltQueueItemError;
+
+export type CobaltQueue = {
+    [id: string]: CobaltQueueItem,
+};

web/src/lib/types/workers.ts

@@ -0,0 +1,22 @@
+export const resultFileTypes = ["video", "audio", "image"] as const;
+
+export type CobaltWorkerType = "remux" | "removebg";
+export type CobaltPipelineResultFileType = typeof resultFileTypes[number];
+
+export type CobaltWorkerProgress = {
+    indeterminate: boolean,
+    speed?: number,
+    percentage: number,
+}
+
+export type CobaltWorkerArgs = {
+    files: File[],
+    //TODO: args for libav & etc with unique types
+}
+
+export type CobaltPipelineItem = {
+    worker: CobaltWorkerType,
+    workerId: string,
+    parentId: string,
+    workerArgs: CobaltWorkerArgs,
+}

web/src/routes/remux/+page.svelte

@@ -1,11 +1,5 @@
 <script lang="ts">
-    import RemuxWorker from "$lib/workers/remux?worker";
-
-    import { beforeNavigate, goto } from "$app/navigation";
-
     import { t } from "$lib/i18n/translations";
-    import { createDialog } from "$lib/state/dialogs";
-    import { downloadFile } from "$lib/download";
 
     import Skeleton from "$components/misc/Skeleton.svelte";
     import DropReceiver from "$components/misc/DropReceiver.svelte";
@@ -15,130 +9,24 @@
     import IconRepeat from "@tabler/icons-svelte/IconRepeat.svelte";
     import IconDevices from "@tabler/icons-svelte/IconDevices.svelte";
     import IconInfoCircle from "@tabler/icons-svelte/IconInfoCircle.svelte";
+    import { createRemuxPipeline } from "$lib/queen-bee/queue";
 
     let draggedOver = false;
-    let file: File | undefined;
+    let files: FileList | undefined;
 
     let speed: number | undefined;
     let progress: string | undefined;
     let currentProgress: string | undefined;
 
-    let wentAway = false;
-
     let processing = false;
 
-    let worker: Worker;
-
     const remux = async () => {
-        worker = new RemuxWorker();
+        if (!files) return;
 
-        speed = undefined;
+        for (let i = 0; i < files?.length; i++) {
-        progress = undefined;
+            createRemuxPipeline(files[i]);
-        currentProgress = undefined;
-
-        worker.postMessage({ file });
-        processing = true;
-
-        worker.onerror = (e) => {
-            console.error("remux worker exploded:", e);
-            worker.terminate();
-        };
-
-        worker.onmessage = (event) => {
-            const eventData = event.data.cobaltRemuxWorker;
-            if (!eventData) return;
-
-            console.log(eventData);
-
-            if (eventData.progress) {
-                let eprogress = eventData.progress;
-
-                if (eprogress?.speed) {
-                    speed = eprogress.speed;
-                }
-
-                if (eprogress?.durationProcessed) {
-                    currentProgress = eprogress.durationProcessed;
-                }
-
-                if (eprogress?.duration && eprogress?.durationProcessed) {
-                    progress = Math.max(
-                        0,
-                        Math.min(
-                            100,
-                            (eprogress.durationProcessed / eprogress.duration) *
-                                100
-                        )
-                    ).toFixed(2);
-                }
-
-                console.log(eprogress, progress, speed, currentProgress);
-            }
-
-            if (eventData.render) {
-                processing = false;
-                worker.terminate();
-                return downloadFile({
-                    file: new File([eventData.render], eventData.filename, {
-                        type: eventData.render.type,
-                    }),
-                });
-            }
-
-            if (eventData.error) {
-                processing = false;
-                worker.terminate();
-
-                return createDialog({
-                    id: "remux-error",
-                    type: "small",
-                    meowbalt: "error",
-                    bodyText: $t(eventData.error),
-                    buttons: [
-                        {
-                            text: $t("button.gotit"),
-                            main: true,
-                            action: () => {},
-                        },
-                    ],
-                });
-            }
-        };
-    };
-
-    beforeNavigate((event) => {
-        if (processing && !wentAway) {
-            event.cancel();
-            const path = event.to?.route?.id;
-
-            if (path) {
-                return createDialog({
-                    id: "remux-ongoing",
-                    type: "small",
-                    icon: "warn-red",
-                    title: $t("dialog.processing.title.ongoing"),
-                    bodyText: $t("dialog.processing.ongoing"),
-                    buttons: [
-                        {
-                            text: $t("button.no"),
-                            main: false,
-                            action: () => {},
-                        },
-                        {
-                            text: $t("button.yes"),
-                            main: true,
-                            color: "red",
-                            action: async () => {
-                                worker.terminate();
-                                wentAway = true;
-                                goto(path);
-                            },
-                        },
-                    ],
-                });
-            }
         }
-    });
+    };
 </script>
 
 <svelte:head>
@@ -150,7 +38,7 @@
 </svelte:head>
 
 <DropReceiver
-    bind:file
+    bind:files
     bind:draggedOver
     id="remux-container"
     classes={processing ? "processing" : ""}
@@ -165,7 +53,7 @@
         <div id="remux-receiver">
             <FileReceiver
                 bind:draggedOver
-                bind:file
+                bind:files
                 acceptTypes={["video/*", "audio/*"]}
                 acceptExtensions={[
                     "mp4",
@@ -178,12 +66,12 @@
                 ]}
             />
 
-            {#if file}
+            {#if files}
                 <div class="button-row">
                     <button on:click={remux}>remux</button>
                     <button
                         on:click={() => {
-                            file = undefined;
+                            files = undefined;
                         }}
                     >
                         clear imported files
@@ -236,9 +124,8 @@
                 {/if}
                 <button
                     on:click={() => {
-                        file = undefined;
+                        files = undefined;
                         processing = false;
-                        worker?.terminate();
                     }}
                 >
                     cancel