diff --git a/apps/api-daemon/src/capture/streamIngest.ts b/apps/api-daemon/src/capture/streamIngest.ts
index 405de12..873d7e8 100644
--- a/apps/api-daemon/src/capture/streamIngest.ts
+++ b/apps/api-daemon/src/capture/streamIngest.ts
@@ -96,7 +96,7 @@ async function processCompletedSegments(
 }
 
 async function runCapture(job: Job<StreamIngestJob>): Promise<void> {
-  const { sessionId, youtubeUrl } = job.data;
+  const { sessionId, youtubeUrl, segmentTimeSec } = job.data;
   const outDir = path.join(env.sharedMediaRoot, "raw", sessionId);
   await mkdir(outDir, { recursive: true });
 
@@ -121,7 +121,7 @@ async function runCapture(job: Job<StreamIngestJob>): Promise<void> {
       "-i", "pipe:0",
       "-c", "copy",
       "-f", "segment",
-      "-segment_time", String(env.segmentTimeSec),
+      "-segment_time", String(segmentTimeSec ?? env.segmentTimeSec),
       "-reset_timestamps", "1",
       "-segment_list", segmentListPath,
       "-segment_list_type", "csv",
diff --git a/apps/api-daemon/src/queues.ts b/apps/api-daemon/src/queues.ts
index d0280a2..b57d039 100644
--- a/apps/api-daemon/src/queues.ts
+++ b/apps/api-daemon/src/queues.ts
@@ -19,6 +19,8 @@ export interface StreamIngestJob {
   sessionId: string;
   channelDbId: string;
   youtubeUrl: string;
+  /** Kanala özel segment süresi (sn) — verilmezse env.segmentTimeSec kullanılır. */
+  segmentTimeSec?: number;
 }
 
 export interface SignalDetectionJob {
diff --git a/apps/api-daemon/src/youtubePolling.ts b/apps/api-daemon/src/youtubePolling.ts
index c1f96f6..85f7ce4 100644
--- a/apps/api-daemon/src/youtubePolling.ts
+++ b/apps/api-daemon/src/youtubePolling.ts
@@ -85,7 +85,7 @@ async function findLiveVideoId(channelId: string): Promise<string | null> {
  * force-start on a channel that's already live).
  */
 export async function startCaptureSession(
-  channel: { id: string; name: string },
+  channel: { id: string; name: string; segmentTimeSec?: number | null },
   youtubeUrl: string,
   liveVideoId: string | null = null,
 ): Promise<{ started: boolean }> {
@@ -102,6 +102,7 @@ export async function startCaptureSession(
     sessionId: session.id,
     channelDbId: channel.id,
     youtubeUrl,
+    segmentTimeSec: channel.segmentTimeSec ?? undefined,
   });
 
   const notifySetting = await prisma.appSetting.findUnique({ where: { key: "notify_stream_start" } });
@@ -113,7 +114,12 @@ export async function startCaptureSession(
 }
 
 /** Runs the live-check for a single channel and applies its result — the unit both `pollOnce` and the panel's manual "şimdi kontrol et" action reuse. */
-export async function checkChannel(channel: { id: string; name: string; channelId: string }): Promise<{
+export async function checkChannel(channel: {
+  id: string;
+  name: string;
+  channelId: string;
+  segmentTimeSec?: number | null;
+}): Promise<{
   liveVideoId: string | null;
   error: PollError | null;
 }> {
diff --git a/apps/frontend/app/actions.ts b/apps/frontend/app/actions.ts
index b31e410..9026772 100644
--- a/apps/frontend/app/actions.ts
+++ b/apps/frontend/app/actions.ts
@@ -80,6 +80,15 @@ export async function toggleChannelActive(channelId: string, nextActive: boolean
   revalidatePath("/", "layout");
 }
 
+export async function updateChannelSegmentTime(channelId: string, formData: FormData) {
+  const raw = String(formData.get("segmentTimeMin") ?? "").trim();
+  const minutes = raw === "" ? null : Number(raw);
+  const seconds = minutes !== null && Number.isFinite(minutes) && minutes > 0 ? Math.round(minutes * 60) : null;
+
+  await prisma.channel.update({ where: { id: channelId }, data: { segmentTimeSec: seconds } });
+  revalidatePath(`/channels/${channelId}`);
+}
+
 export async function toggleAllChannels(nextActive: boolean) {
   await prisma.channel.updateMany({ data: { isActive: nextActive } });
   revalidatePath("/", "layout");
diff --git a/apps/frontend/app/channels/[id]/page.tsx b/apps/frontend/app/channels/[id]/page.tsx
index 2fc4131..e533415 100644
--- a/apps/frontend/app/channels/[id]/page.tsx
+++ b/apps/frontend/app/channels/[id]/page.tsx
@@ -10,12 +10,14 @@ import {
   forceStartCapture,
   retryRender,
   cancelRender,
+  updateChannelSegmentTime,
 } from "../../actions";
 import { ConfirmButton } from "../../components/ConfirmButton";
 import { LiveLogViewer } from "../../components/LiveLogViewer";
 import { SessionTimer } from "../../components/SessionTimer";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
 import { Badge, type badgeVariants } from "@/components/ui/badge";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 import type { VariantProps } from "class-variance-authority";
@@ -114,6 +116,34 @@ export default async function ChannelDetailPage({ params }: { params: Promise<{
             {channel.lastCheckedAt ? new Date(channel.lastCheckedAt).toLocaleString("tr-TR") : "—"}
           </p>
 
+          <form
+            action={updateChannelSegmentTime.bind(null, channel.id)}
+            className="flex flex-wrap items-end gap-2"
+          >
+            <div className="flex flex-col gap-1.5">
+              <Label htmlFor="segmentTimeMin" className="text-xs text-muted-foreground">
+                Bu kanal için segment süresi (dakika)
+              </Label>
+              <Input
+                id="segmentTimeMin"
+                name="segmentTimeMin"
+                type="number"
+                min={1}
+                max={60}
+                step={0.5}
+                placeholder="varsayılan (15)"
+                defaultValue={channel.segmentTimeSec ? channel.segmentTimeSec / 60 : ""}
+                className="w-40"
+              />
+            </div>
+            <Button type="submit" variant="outline" size="sm">
+              Kaydet
+            </Button>
+            <span className="text-xs text-muted-foreground">
+              Boş bırakılırsa global varsayılan kullanılır. Sadece bundan sonra başlayacak kayıtları etkiler.
+            </span>
+          </form>
+
           {status === undefined && (
             <p className="text-sm text-muted-foreground">
               api-daemon&apos;dan canlı durum alınamadı (servis erişilemez olabilir).
diff --git a/packages/db/prisma/migrations/20260902000000_channel_segment_time/migration.sql b/packages/db/prisma/migrations/20260902000000_channel_segment_time/migration.sql
new file mode 100644
index 0000000..63eeb10
--- /dev/null
+++ b/packages/db/prisma/migrations/20260902000000_channel_segment_time/migration.sql
@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "channels" ADD COLUMN "segment_time_sec" INTEGER;
diff --git a/packages/db/prisma/schema.prisma b/packages/db/prisma/schema.prisma
index cf9a7c3..159f04e 100644
--- a/packages/db/prisma/schema.prisma
+++ b/packages/db/prisma/schema.prisma
@@ -34,6 +34,8 @@ model Channel {
   isActive       Boolean   @default(true) @map("is_active")
   lastCheckedAt  DateTime? @map("last_checked_at")
   createdAt      DateTime  @default(now()) @map("created_at")
+  // null = global varsayılanı (SEGMENT_TIME_SEC env var) kullan
+  segmentTimeSec Int?      @map("segment_time_sec")
 
   sessions StreamSession[]