diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h
index 895edbd6d6..927e402f7c 100644
--- a/fftools/ffmpeg.h
+++ b/fftools/ffmpeg.h
@@ -802,7 +802,6 @@ int hw_device_init_from_type(enum AVHWDeviceType type,
                              HWDevice **dev_out);
 void hw_device_free_all(void);
 
-int hw_device_setup_for_encode(OutputStream *ost);
 /**
  * Get a hardware device to be used with this filtergraph.
  * The returned reference is owned by the callee, the caller
diff --git a/fftools/ffmpeg_enc.c b/fftools/ffmpeg_enc.c
index 9b81d14922..7d99d9270b 100644
--- a/fftools/ffmpeg_enc.c
+++ b/fftools/ffmpeg_enc.c
@@ -103,6 +103,61 @@ fail:
     return AVERROR(ENOMEM);
 }
 
+static int hw_device_setup_for_encode(OutputStream *ost)
+{
+    const AVCodecHWConfig *config;
+    HWDevice *dev = NULL;
+    AVBufferRef *frames_ref = NULL;
+    int i;
+
+    if (ost->filter) {
+        frames_ref = av_buffersink_get_hw_frames_ctx(ost->filter->filter);
+        if (frames_ref &&
+            ((AVHWFramesContext*)frames_ref->data)->format ==
+            ost->enc_ctx->pix_fmt) {
+            // Matching format, will try to use hw_frames_ctx.
+        } else {
+            frames_ref = NULL;
+        }
+    }
+
+    for (i = 0;; i++) {
+        config = avcodec_get_hw_config(ost->enc_ctx->codec, i);
+        if (!config)
+            break;
+
+        if (frames_ref &&
+            config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX &&
+            (config->pix_fmt == AV_PIX_FMT_NONE ||
+             config->pix_fmt == ost->enc_ctx->pix_fmt)) {
+            av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using input "
+                   "frames context (format %s) with %s encoder.\n",
+                   av_get_pix_fmt_name(ost->enc_ctx->pix_fmt),
+                   ost->enc_ctx->codec->name);
+            ost->enc_ctx->hw_frames_ctx = av_buffer_ref(frames_ref);
+            if (!ost->enc_ctx->hw_frames_ctx)
+                return AVERROR(ENOMEM);
+            return 0;
+        }
+
+        if (!dev &&
+            config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX)
+            dev = hw_device_get_by_type(config->device_type);
+    }
+
+    if (dev) {
+        av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using device %s "
+               "(type %s) with %s encoder.\n", dev->name,
+               av_hwdevice_get_type_name(dev->type), ost->enc_ctx->codec->name);
+        ost->enc_ctx->hw_device_ctx = av_buffer_ref(dev->device_ref);
+        if (!ost->enc_ctx->hw_device_ctx)
+            return AVERROR(ENOMEM);
+    } else {
+        // No device required, or no device available.
+    }
+    return 0;
+}
+
 static void set_encoder_id(OutputFile *of, OutputStream *ost)
 {
     const char *cname = ost->enc_ctx->codec->name;
diff --git a/fftools/ffmpeg_hw.c b/fftools/ffmpeg_hw.c
index d28257a1d6..4a0b346fe1 100644
--- a/fftools/ffmpeg_hw.c
+++ b/fftools/ffmpeg_hw.c
@@ -297,61 +297,6 @@ void hw_device_free_all(void)
     nb_hw_devices = 0;
 }
 
-int hw_device_setup_for_encode(OutputStream *ost)
-{
-    const AVCodecHWConfig *config;
-    HWDevice *dev = NULL;
-    AVBufferRef *frames_ref = NULL;
-    int i;
-
-    if (ost->filter) {
-        frames_ref = av_buffersink_get_hw_frames_ctx(ost->filter->filter);
-        if (frames_ref &&
-            ((AVHWFramesContext*)frames_ref->data)->format ==
-            ost->enc_ctx->pix_fmt) {
-            // Matching format, will try to use hw_frames_ctx.
-        } else {
-            frames_ref = NULL;
-        }
-    }
-
-    for (i = 0;; i++) {
-        config = avcodec_get_hw_config(ost->enc_ctx->codec, i);
-        if (!config)
-            break;
-
-        if (frames_ref &&
-            config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX &&
-            (config->pix_fmt == AV_PIX_FMT_NONE ||
-             config->pix_fmt == ost->enc_ctx->pix_fmt)) {
-            av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using input "
-                   "frames context (format %s) with %s encoder.\n",
-                   av_get_pix_fmt_name(ost->enc_ctx->pix_fmt),
-                   ost->enc_ctx->codec->name);
-            ost->enc_ctx->hw_frames_ctx = av_buffer_ref(frames_ref);
-            if (!ost->enc_ctx->hw_frames_ctx)
-                return AVERROR(ENOMEM);
-            return 0;
-        }
-
-        if (!dev &&
-            config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX)
-            dev = hw_device_get_by_type(config->device_type);
-    }
-
-    if (dev) {
-        av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using device %s "
-               "(type %s) with %s encoder.\n", dev->name,
-               av_hwdevice_get_type_name(dev->type), ost->enc_ctx->codec->name);
-        ost->enc_ctx->hw_device_ctx = av_buffer_ref(dev->device_ref);
-        if (!ost->enc_ctx->hw_device_ctx)
-            return AVERROR(ENOMEM);
-    } else {
-        // No device required, or no device available.
-    }
-    return 0;
-}
-
 static int hwaccel_retrieve_data(AVCodecContext *avctx, AVFrame *input)
 {
     InputStream *ist = avctx->opaque;