a bit better

src/App.svelte

@@ -5,43 +5,46 @@
   import Output from "./Output.svelte";
   import Filter from "./Filter.svelte";
   import FilterPicker from "./FilterPicker.svelte";
-  import Modal from "./Modal.svelte";
   import { FFmpeg } from "@ffmpeg/ffmpeg";
   import { fetchFile, toBlobURL } from "@ffmpeg/util";
 
   const baseURL = "https://unpkg.com/@ffmpeg/core-mt@0.12.2/dist/esm";
   // const baseURL = "";
   // const videoURL = "https://ffmpegwasm.netlify.app/video/video-15s.avi";
-  const videoURL = "/example.mp4";
   const TIMEOUT = 40000;
 
   const ffmpeg = new FFmpeg();
 
-  let showFilterModal = false;
   let command = "";
   let message = "";
-  let videoValue = null;
+  let videoValue = "/" + $inputs[0];
   let ffmpegLoaded = false;
   let rendering = false;
+  let log = "";
+  let logbox;
+  let commandRef;
 
   function newInput() {
-    $inputs = [...$inputs, ""];
+    $inputs = [...$inputs, "punch.mp4"];
-  }
-
-  function newFilter() {
-    showFilterModal = true;
   }
 
   function render() {
     transcode();
   }
 
+  function copyCommand() {
+    commandRef.select();
+    document.execCommand("copy");
+  }
+
   async function transcode() {
     // try {
     message = "Start transcoding";
     videoValue = null;
     rendering = true;
-    await ffmpeg.writeFile("example.mp4", await fetchFile(videoURL));
+    for (let vid of $inputs) {
+      await ffmpeg.writeFile(vid, await fetchFile("/" + vid));
+    }
     // const infile = await ffmpeg.readFile("example.mp4");
     //    videoValue = URL.createObjectURL(new Blob([infile.buffer], { type: "video/mp4" }));
     // console.log("VIDEO", videoValue);
@@ -65,22 +68,7 @@
 
     const cOutput = $output;
 
-    const cFilters = $filters
+    const cFilters = $filters.map(makeFilterArgs).join(",");
-      .map((f) => {
-        let fCommand = f.name;
-        if (f.params && f.params.length > 0) {
-          let params = f.params
-            .map((p) => {
-              if (p.value === "" || p.value === null) return null;
-              return `${p.name}=${p.value}`;
-            })
-            .filter((p) => p !== null)
-            .join(":");
-          fCommand += "=" + params;
-        }
-        return fCommand;
-      })
-      .join(",");
 
     let out = `ffmpeg ${cInputs}`;
 
@@ -102,13 +90,18 @@
         })
         .filter((p) => p !== null)
         .join(":");
-      fCommand += "=" + params;
+      if (params) fCommand += "=" + params;
     }
     return fCommand;
   }
 
   function commandList() {
-    let command = ["-i", "example.mp4"];
+    let command = [];
+    for (let vid of $inputs) {
+      command.push("-i");
+      command.push(vid);
+    }
+    // let command = ["-i", "example.mp4"];
 
     // const audioFilters = $filters.filter(f => f.type[0] === "A").map(makeFilterArgs);
     // const videoFilters = $filters.filter(f => f.type[0] === "V").map(makeFilterArgs);
@@ -133,6 +126,8 @@
   onMount(async () => {
     ffmpeg.on("log", ({ message: msg }) => {
       console.log(msg);
+      log += msg + "\n";
+      logbox.scrollTop = logbox.scrollHeight;
       // message = msg;
     });
     await ffmpeg.load({
@@ -143,45 +138,27 @@
       wasmURL: await toBlobURL(`${baseURL}/ffmpeg-core.wasm`, "application/wasm"),
       workerURL: await toBlobURL(`${baseURL}/ffmpeg-core.worker.js`, "text/javascript"),
     });
-    console.log(ffmpeg);
     ffmpegLoaded = true;
   });
 </script>
 
 <main>
-  {message}
+  <section class="header">
-  <section class="command">{command}</section>
+    <h1>FFmpeg Explorer</h1>
-  <section class="inputs">
+    <p>
-    <h3>Inputs</h3>
+      A tool to help you explore FFmpeg filters and options. To use: select one or more input videos
-    {#each $inputs as inp, index}
+      (there are currently two options), export and add some filters, and then hit "render" to
-      <Input bind:filename={inp} {index} />
+      preview the output in browser.
-    {/each}
+      Note: this is a work in progress, many things may still be broken! By <a href="https://lav.io"
-    <button on:click={newInput}>New Input</button>
+        >Sam Lavigne</a
-
+      >.
-    {#each $inputs as inp}
+    </p>
-      <p>{inp}</p>
-    {/each}
   </section>
-
+  <!-- {message} -->
-  <section class="filters">
+  <section class="command">
-    <!-- {JSON.stringify($filters)} -->
+    <textarea class="actual-command" bind:this={commandRef}>{command}</textarea>
-    <h3>Filters</h3>
+    <div>
-    <button on:click={newFilter}>Add Filter</button>
+      <button on:click={copyCommand}>Copy</button>
-    <Modal bind:showModal={showFilterModal}>
-      <FilterPicker bind:showFilterModal />
-    </Modal>
-    <div class="filters-holder">
-      {#each $filters as f, index}
-        <div class="filter">
-          <Filter bind:filter={f} {index} />
-        </div>
-      {/each}
-    </div>
-  </section>
-
-  <section class="output">
-    <h3>Output</h3>
-    <Output bind:filename={$output} />
       <button on:click={render} disabled={!ffmpegLoaded}>
         {#if ffmpegLoaded}
           {#if rendering}
@@ -193,18 +170,160 @@
           Loading ffmpeg
         {/if}
       </button>
-    {#if videoValue}
+    </div>
+  </section>
+
+  <section class="inputs">
+    <div class="section-header">
+      <h3>Inputs</h3>
+      <button on:click={newInput}>Add Input</button>
+    </div>
+    {#each $inputs as inp, index}
+      <Input bind:filename={inp} {index} />
+    {/each}
+  </section>
+
+  <section class="log">
+    <h3>FFmpeg Log</h3>
+    <textarea class="the-log" bind:this={logbox}>{log}</textarea>
+  </section>
+
+  <section class="preview">
     <video controls src={videoValue} />
-    {/if}
+  </section>
+
+  <section class="output">
+    <h3>Output</h3>
+    <Output bind:filename={$output} />
+  </section>
+
+  <section class="filters">
+    <h3>Filters</h3>
+    <div class="inner-filters">
+      <div class="filter-picker">
+        <FilterPicker select={"video"} />
+      </div>
+      <div class="filters-holder">
+        {#each $filters as f, index}
+          <div class="filter">
+            <Filter bind:filter={f} {index} />
+          </div>
+        {/each}
+      </div>
+    </div>
   </section>
 </main>
 
 <style>
+  main {
+    display: grid;
+    grid-template-columns: repeat(3, 1fr);
+    grid-template-areas:
+      "hdr hdr hdr"
+      "cmd cmd cmd"
+      "inp log prv"
+      "out log prv"
+      "flt flt flt";
+    grid-gap: 20px;
+  }
+
+  section {
+    border: 1px solid #999;
+    padding: 10px;
+    background-color: rgb(245, 245, 245);
+  }
+
+  .header {
+    grid-area: hdr;
+  }
+
+  .command {
+    grid-area: cmd;
+  }
+
+  .inputs {
+    grid-area: inp;
+  }
+
+  .preview {
+    grid-area: prv;
+  }
+
+  .output {
+    grid-area: out;
+  }
+
+  .log {
+    grid-area: log;
+    display: flex;
+    flex-direction: column;
+  }
+
+  .inner-filters {
+    display: flex;
+  }
+
+  .filters {
+    grid-area: flt;
+  }
+
+  .filter-picker {
+    max-height: 500px;
+    max-width: 400px;
+    position: sticky;
+    top: 0;
+    left: 0;
+    overflow: scroll;
+    background-color: #fff;
+  }
+
   .filters-holder {
     display: grid;
     grid-template-columns: repeat(3, 1fr);
+    grid-gap: 10px;
+    padding-left: 10px;
+    flex: 1;
+    align-content: start;
   }
   .filter {
-    margin: 10px;
+    /* width: 33%; */
+  }
+  h1,
+  h2,
+  h3 {
+    font-weight: normal;
+    margin: 0;
+    padding: 0;
+  }
+  h3 {
+    margin-bottom: 10px;
+  }
+  .header p {
+    margin: 0;
+  }
+
+  .command {
+    display: flex;
+    align-items: center;
+    margin: 10px 0px;
+  }
+
+  .actual-command {
+    border: none;
+    margin-right: 10px;
+    resize: none;
+    flex: 1;
+    font: inherit;
+  }
+  .section-header {
+    display: flex;
+  }
+  .section-header h3 {
+    flex: 1;
+  }
+  .the-log {
+    border: none;
+    resize: none;
+    flex: 1;
   }
 </style>

src/Filter.svelte

@@ -9,6 +9,7 @@
   };
 
   export let index;
+	let show = false;
 
   function remove() {
     $filters.splice(index, 1);
@@ -18,13 +19,16 @@
 
 <div class="filter-holder">
   <div class="head">
-    <div class="name">{filter.name}</div>
+    <div class="name"><h3>{filter.name}<h3></div>
+		<div>
+			<button on:click={() => show = !show}>{show ? "Hide" : "Show"} Options</button>
 			<button on:click={remove}>X</button>
 		</div>
+  </div>
 
   <div class="description">{filter.description}</div>
 
-  {#if filter.params.length > 0}
+  {#if filter.params && filter.params.length > 0 && show}
     <div class="options">
       {#each filter.params as p}
         <div class="param-holder">
@@ -41,7 +45,7 @@
                   {/each}
                 </select>
               {:else if p.type == "float" || p.type == "double" || p.type == "long" || p.type == "int"}
-                <input type="range" min={p.min} max={p.max} bind:value={p.value} />
+                <input step={p.type == "int" ? 1 : 0.01 } type="range" min={p.min} max={p.max} bind:value={p.value} />
                 <input bind:value={p.value} />
               {:else}
                 <input bind:value={p.value} />
@@ -56,6 +60,12 @@
 </div>
 
 <style>
+	h3 {
+	font-weight: normal;
+	margin: 0;
+	padding: 0;
+	font-size: 18px;
+	}
   .filter-holder {
     background-color: #fff;
     padding: 10px;

src/FilterPicker.svelte

@@ -3,37 +3,55 @@
   import FILTERS from "./filters.json";
   import { filters } from "./stores.js";
 
-  let allfilters = [...FILTERS];
+	export let select = "video";
+	$: selectedFilters = selectFilters(select);
+  $: allfilters = [...selectedFilters];
   let q = "";
-	export let showFilterModal;
 
   const uf = new uFuzzy();
 
+	function selectFilters(sel) {
+		if (sel == "video") {
+			return FILTERS.filter(f => f.type[0] === "V")
+		} else if (sel == "audio") {
+			return FILTERS.filter(f => f.type[0] === "A")
+		} else {
+			return [...FILTERS];
+		}
+	}
+
+	function reset() {
+		console.log('ressetting', select)
+		selectedFilters = selectFilters(select);
+		q = "";
+	}
+
   function add(f) {
     const newFilter = { ...f };
+		if (f.params) {
 			newFilter.params = f.params.map((p) => {
 				p.value = null;
 				if (p.default != null) p.value = p.default;
 				return p;
 			});
+		}
     $filters = [...$filters, newFilter];
-		showFilterModal = false;
     console.log(newFilter);
   }
 
   function update() {
     let newFilters = [];
     const [idxs, info, order] = uf.search(
-      FILTERS.map((m) => m.name + " " + m.description),
+      selectedFilters.map((m) => m.name + " " + m.description),
       q
     );
     if (idxs) {
       for (let i of idxs) {
-        newFilters.push(FILTERS[i]);
+        newFilters.push(selectedFilters[i]);
       }
       allfilters = newFilters;
     } else {
-      allfilters = FILTERS;
+      allfilters = [...selectedFilters];
     }
   }
 </script>
@@ -41,11 +59,15 @@
 <div class="holder">
   <div class="search">
     <input placeholder="Search Filters" on:keyup={update} bind:value={q} />
+		<select on:change={reset} bind:value={select}>
+			<option value="video">Video Filters</option>
+			<option value="audio">Audio Filters</option>
+		</select>
   </div>
   <div class="all-filters">
     {#each allfilters as f}
       <div class="filter" on:click={() => add(f)}>
-        <div class="name">{f.name} <span class="type">{f.type}</span></div>
+        <div class="name">{f.name} <span class="type">{f.type.replace("->", "⇒")}</span></div>
         <div class="desc">{f.description}</div>
       </div>
     {/each}
@@ -56,7 +78,12 @@
   .holder {
     display: flex;
     flex-direction: column;
-    height: 400px;
+		height: 100%;
+		padding: 10px;
+  }
+	.type {
+		color: #999;
+		font-size: 0.8em;
 	}
 
   .filter {

src/Input.svelte

@@ -1,6 +1,6 @@
 <script>
-	import { inputs } from './stores.js';
+  import { inputs } from "./stores.js";
-	export let filename="";
+  export let filename = "punch.mp4";
   export let index;
 
   function remove() {
@@ -10,6 +10,21 @@
 </script>
 
 <div>
-	<input bind:value={filename} />
+  <select bind:value={filename}>
-	<button on:click={remove}>Remove</button>
+    <option value="punch.mp4">punch.mp4</option>
+    <option value="shoe.mp4">shoe.mp4</option>
+  </select>
+  <button on:click={remove}>X</button>
 </div>
+
+<style>
+  div {
+    margin-top: 10px;
+    margin-bottom: 10px;
+    display: flex;
+  }
+  select {
+    flex: 1;
+		margin-right: 10px;
+  }
+</style>

src/app.css

@@ -1,13 +1,24 @@
+* {
+	box-sizing: border-box;
+}
 :root {
 }
 
 a {
+	color: #000;
 }
 a:hover {
 }
 
 body {
 	background-color: #eee;
+	font: 16px Times, serif;
+}
+textrea, select, input, button {
+	font: inherit;
+}
+video {
+	width: 100%;
 }
 
 h1 {

src/stores.js

@@ -1,5 +1,5 @@
 import { writable } from 'svelte/store';
 
-export const inputs = writable(["example.mp4"]);
+export const inputs = writable(["punch.mp4"]);
 export const output = writable("out.mp4");
 export const filters = writable([]);