Add dynamic widget visibility and per-format pixel formats for FastAbsoluteSaver

Hide/show format-specific widgets (CRF, bitrate, ProRes profile, GIF dither,
pixel format, webp settings) based on selected save_format. Pixel format combo
updates dynamically per codec. Remove hardcoded ffv1 pix_fmt to use widget value.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

fast_saver.py

@@ -125,7 +125,7 @@ VIDEO_FORMATS = {
     "ffv1-mkv":      {"ext": ".mkv",  "codec": ["-c:v", "ffv1", "-level", "3",
                        "-coder", "1", "-context", "1", "-g", "1",
                        "-slices", "16", "-slicecrc", "1"],
-                      "quality": "lossless", "pix_fmt": "yuv444p"},
+                      "quality": "lossless"},
     "prores-mov":    {"ext": ".mov",  "codec": ["-c:v", "prores_ks"],
                       "quality": "profile", "color_mgmt": True},
     "nvenc_h264-mp4":{"ext": ".mp4",  "codec": ["-c:v", "h264_nvenc"],
@@ -175,7 +175,7 @@ class FastAbsoluteSaver:
                 # --- VIDEO SPECIFIC ---
                 "video_fps": ("INT", {"default": 24, "min": 1, "max": 120, "step": 1, "label": "Video FPS"}),
                 "video_crf": ("INT", {"default": 18, "min": 0, "max": 51, "step": 1, "label": "Video CRF (0=Lossless, 51=Worst)"}),
-                "video_pixel_format": (["yuv420p", "yuv444p", "yuv420p10le"], {"label": "Pixel Format"}),
+                "video_pixel_format": (["yuv420p", "yuv422p", "yuv444p", "yuv420p10le", "rgb24", "bgra"], {"label": "Pixel Format"}),
                 "video_bitrate": ("INT", {"default": 10, "min": 1, "max": 999, "step": 1, "label": "Video Bitrate (Mbps, NVENC)"}),
                 "prores_profile": (["lt", "standard", "hq", "4444", "4444xq"], {"label": "ProRes Profile"}),
                 "gif_dither": (["sierra2_4a", "floyd_steinberg", "bayer", "sierra2", "sierra3", "burkes", "atkinson", "heckbert", "none"], {"label": "GIF Dither Algorithm"}),

web/fast_saver.js

@@ -0,0 +1,109 @@
+import { app } from "../../scripts/app.js";
+
+const FORMAT_WIDGETS = {
+    "png":            [],
+    "webp":           ["webp_lossless", "webp_quality", "webp_method"],
+    "mp4":            ["video_fps", "video_crf", "video_pixel_format"],
+    "h265-mp4":       ["video_fps", "video_crf", "video_pixel_format"],
+    "av1-mp4":        ["video_fps", "video_crf", "video_pixel_format"],
+    "webm":           ["video_fps", "video_crf", "video_pixel_format"],
+    "gif":            ["video_fps", "gif_dither"],
+    "ffv1-mkv":       ["video_fps", "video_pixel_format"],
+    "prores-mov":     ["video_fps", "prores_profile"],
+    "nvenc_h264-mp4": ["video_fps", "video_pixel_format", "video_bitrate"],
+    "nvenc_hevc-mp4": ["video_fps", "video_pixel_format", "video_bitrate"],
+    "nvenc_av1-mp4":  ["video_fps", "video_pixel_format", "video_bitrate"],
+};
+
+const FORMAT_PIX_FMTS = {
+    "mp4":            ["yuv420p", "yuv444p"],
+    "h265-mp4":       ["yuv420p", "yuv444p", "yuv420p10le"],
+    "av1-mp4":        ["yuv420p", "yuv420p10le"],
+    "webm":           ["yuv420p", "yuv444p", "yuv420p10le"],
+    "ffv1-mkv":       ["yuv420p", "yuv422p", "yuv444p", "rgb24", "bgra"],
+    "nvenc_h264-mp4": ["yuv420p", "yuv444p"],
+    "nvenc_hevc-mp4": ["yuv420p", "yuv444p", "yuv420p10le"],
+    "nvenc_av1-mp4":  ["yuv420p", "yuv420p10le"],
+};
+
+const ALL_MANAGED = [
+    "webp_lossless", "webp_quality", "webp_method",
+    "video_fps", "video_crf", "video_pixel_format",
+    "video_bitrate", "prores_profile", "gif_dither",
+];
+
+function hideWidget(node, widget) {
+    if (widget.origType === undefined) widget.origType = widget.type;
+    widget.type = "hidden";
+    widget.computeSize = () => [0, -4];
+}
+
+function showWidget(node, widget) {
+    if (widget.origType !== undefined) {
+        widget.type = widget.origType;
+        delete widget.origType;
+        delete widget.computeSize;
+    }
+}
+
+function updateVisibility(node) {
+    const formatWidget = node.widgets?.find(w => w.name === "save_format");
+    if (!formatWidget) return;
+
+    const format = formatWidget.value;
+    const visible = new Set(FORMAT_WIDGETS[format] || []);
+
+    for (const name of ALL_MANAGED) {
+        const w = node.widgets?.find(w => w.name === name);
+        if (!w) continue;
+        if (visible.has(name)) {
+            showWidget(node, w);
+        } else {
+            hideWidget(node, w);
+        }
+    }
+
+    // Update pixel format combo options
+    const pixWidget = node.widgets?.find(w => w.name === "video_pixel_format");
+    if (pixWidget && FORMAT_PIX_FMTS[format]) {
+        const opts = FORMAT_PIX_FMTS[format];
+        pixWidget.options.values = opts;
+        if (!opts.includes(pixWidget.value)) {
+            pixWidget.value = opts[0];
+        }
+    }
+
+    node.setSize(node.computeSize());
+    app.graph?.setDirtyCanvas(true, true);
+}
+
+app.registerExtension({
+    name: "fast.absolute.saver.visibility",
+
+    async beforeRegisterNodeDef(nodeType, nodeData, app) {
+        if (nodeData.name !== "FastAbsoluteSaver") return;
+
+        const origOnNodeCreated = nodeType.prototype.onNodeCreated;
+        nodeType.prototype.onNodeCreated = function () {
+            origOnNodeCreated?.apply(this, arguments);
+
+            const formatWidget = this.widgets?.find(w => w.name === "save_format");
+            if (formatWidget) {
+                const origCallback = formatWidget.callback;
+                formatWidget.callback = (...args) => {
+                    origCallback?.apply(formatWidget, args);
+                    updateVisibility(this);
+                };
+            }
+
+            // Defer initial update so all widgets exist
+            queueMicrotask(() => updateVisibility(this));
+        };
+
+        const origOnConfigure = nodeType.prototype.onConfigure;
+        nodeType.prototype.onConfigure = function (info) {
+            origOnConfigure?.apply(this, arguments);
+            queueMicrotask(() => updateVisibility(this));
+        };
+    },
+});