Add support to upload custom file

thumbnail/ffmpeg_binary.ts

@@ -11,6 +11,34 @@ export async function check_ffmpeg_binary(p: string) {
     return o.code === 0;
 }
 
+export async function fb_get_size(i: string) {
+    const cmd = new Deno.Command("ffprobe", {
+        stdout: "piped",
+        stderr: "piped",
+        args: [
+            "-v",
+            "error",
+            "-select_streams",
+            "v:0",
+            "-show_entries",
+            "stream=width,height",
+            "-of",
+            "csv=s=x:p=0",
+            i,
+        ],
+    });
+    const c = cmd.spawn();
+    const o = await c.output();
+    if (o.code !== 0) {
+        return null;
+    }
+    const s = (new TextDecoder()).decode(o.stdout).trim().split("x");
+    return {
+        width: parseInt(s[0]),
+        height: parseInt(s[1]),
+    };
+}
+
 export async function fb_generate_thumbnail(
     p: string,
     i: string,