Use encoderinfo of first image as default for appended TIFF images

If no encoderinfo is specified on an appended TIFF image, use the
encoder info from the first image. This restores 11.1.0 behavior,
while allowing an image specific override.

Tests/test_file_tiff.py

@@ -696,15 +696,19 @@ class TestFileTiff:
         im = hopper()
         im2 = Image.new("L", (128, 128))
         im2.encoderinfo = {"tiffinfo": {278: 256}}
-        im.save(outfile, save_all=True, append_images=[im2])
+        im3 = Image.new("L", (128, 128))
+        im.save(outfile, save_all=True, append_images=[im2, im3], tiffinfo={278: 512})
 
         with Image.open(outfile) as im:
             assert isinstance(im, TiffImagePlugin.TiffImageFile)
-            assert im.tag_v2[278] == 128
+            assert im.tag_v2[278] == 512
 
             im.seek(1)
             assert im.tag_v2[278] == 256
 
+            im.seek(2)
+            assert im.tag_v2[278] == 512
+
     def test_strip_raw(self) -> None:
         infile = "Tests/images/tiff_strip_raw.tif"
         with Image.open(infile) as im:

src/PIL/TiffImagePlugin.py

@@ -2302,7 +2302,9 @@ class AppendingTiffWriter(io.BytesIO):
 
 
 def _save_all(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
-    append_images = list(im.encoderinfo.get("append_images", []))
+    encoderinfo = im.encoderinfo.copy()
+    encoderconfig = im.encoderconfig
+    append_images = list(encoderinfo.get("append_images", []))
     if not hasattr(im, "n_frames") and not append_images:
         return _save(im, fp, filename)
 
@@ -2311,9 +2313,9 @@ def _save_all(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
         with AppendingTiffWriter(fp) as tf:
             for ims in [im] + append_images:
                 if not hasattr(ims, "encoderinfo"):
-                    ims.encoderinfo = {}
+                    ims.encoderinfo = encoderinfo
                 if not hasattr(ims, "encoderconfig"):
-                    ims.encoderconfig = ()
+                    ims.encoderconfig = encoderconfig
                 nfr = getattr(ims, "n_frames", 1)
 
                 for idx in range(nfr):