refactor(media): trim unused ffmpeg wrapper options

Binary paths, the ffmpeg version, the probe's container name and a
configurable stall timeout had no caller; detection is cached per process,
so every helper looks the binaries up itself.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MRtGG9ARfqqhma3t85Ro2u

packages/adapters/src/media/ffmpeg.test.ts

@@ -60,7 +60,6 @@ describe("probe parsing", () => {
     );
     expect(probe).toEqual({
       durationMs: 12_345,
-      formatName: "mov,mp4,m4a,3gp,3g2,mj2",
       video: {
         codec: "h264",
         width: 1080,

packages/adapters/src/media/ffmpeg.ts

@@ -13,12 +13,10 @@ import { delimiter, join } from "node:path";
 export interface FfmpegInfo {
   ffmpegPath: string;
   ffprobePath: string;
-  version: string;
 }
 
 export interface MediaProbe {
   durationMs: number;
-  formatName: string;
   /** Width and height as displayed: swapped when the stream is rotated by 90 or 270 degrees. */
   video?: {
     codec: string;
@@ -50,8 +48,6 @@ export interface RunFfmpegOptions {
   maxOutputBytes?: number;
   /** Files removed when the run fails or is aborted. */
   outputs?: readonly string[];
-  /** Kills ffmpeg when it reports no progress for this long. */
-  stallTimeoutMs?: number;
 }
 
 export class FfmpegError extends Error {
@@ -65,7 +61,8 @@ export class FfmpegError extends Error {
   }
 }
 
-const DEFAULT_STALL_TIMEOUT_MS = 2 * 60_000;
+/** ffmpeg reports progress twice a second while it works; silence this long means a hang. */
+const STALL_TIMEOUT_MS = 2 * 60_000;
 const PROBE_TIMEOUT_MS = 60_000;
 const STDERR_TAIL_BYTES = 8 * 1024;
 const KILL_GRACE_MS = 5_000;
@@ -101,9 +98,7 @@ async function locateFfmpeg(): Promise<FfmpegInfo | null> {
       capture(ffmpegPath, ["-hide_banner", "-version"], { timeoutMs: 10_000 }),
       capture(ffprobePath, ["-hide_banner", "-version"], { timeoutMs: 10_000 }),
     ]);
-    if (ffmpeg.code !== 0 || ffprobe.code !== 0) return null;
-    const version = /version (\S+)/.exec(ffmpeg.stdout)?.[1] ?? "unknown";
-    return { ffmpegPath, ffprobePath, version };
+    return ffmpeg.code === 0 && ffprobe.code === 0 ? { ffmpegPath, ffprobePath } : null;
   } catch {
     return null;
   }
@@ -129,7 +124,7 @@ async function findExecutable(name: string): Promise<string | null> {
   return null;
 }
 
-export async function requireFfmpeg(): Promise<FfmpegInfo> {
+async function requireFfmpeg(): Promise<FfmpegInfo> {
   const info = await detectFfmpeg();
   if (!info) throw new Error("ffmpeg and ffprobe are not installed on this server.");
   return info;
@@ -223,7 +218,7 @@ interface ProbeStream {
 /** Parses `ffprobe -print_format json -show_format -show_streams` output. */
 export function parseProbeOutput(json: string): MediaProbe {
   const data = JSON.parse(json) as {
-    format?: { duration?: string; format_name?: string };
+    format?: { duration?: string };
     streams?: ProbeStream[];
   };
   const streams = data.streams ?? [];
@@ -237,7 +232,6 @@ export function parseProbeOutput(json: string): MediaProbe {
     Math.max(0, ...streams.map((stream) => positive(Number(stream.duration)) ?? 0));
   return {
     durationMs: Math.round(seconds * 1000),
-    formatName: data.format?.format_name ?? "",
     ...(video?.width && video.height
       ? { video: probeVideo(video, video.width, video.height) }
       : {}),
@@ -385,12 +379,11 @@ function spawnFfmpeg(
       setTimeout(() => finish(error), KILL_GRACE_MS).unref?.();
     };
     const abort = () => kill(signal?.reason ?? new Error("aborted"));
-    const stallTimeoutMs = options.stallTimeoutMs ?? DEFAULT_STALL_TIMEOUT_MS;
     const armStallTimer = () => {
       clearTimeout(stallTimer);
       stallTimer = setTimeout(
         () => kill(new FfmpegError("ffmpeg stopped making progress.", null, tail(stderr))),
-        stallTimeoutMs,
+        STALL_TIMEOUT_MS,
       );
       stallTimer.unref?.();
     };

packages/adapters/src/media/video-edit-plan.test.ts

@@ -13,7 +13,6 @@ function probe(
   const { durationMs = 10_000, hasAudio = true, ...video } = overrides;
   return {
     durationMs,
-    formatName: "mov,mp4,m4a,3gp,3g2,mj2",
     video: {
       codec: "h264",
       width: 1920,