Build linux armv7

.github/workflows/tests.yml

@@ -34,6 +34,8 @@ jobs:
             arch: x86_64
           - os: ubuntu-24.04-arm
             arch: aarch64
+          - os: ubuntu-24.04
+            arch: armv7l
           - os: ubuntu-24.04
             arch: x86_64
           - os: windows-latest
@@ -45,6 +47,11 @@ jobs:
       - uses: actions/setup-python@v6
         with:
           python-version: "3.14"
+      - name: Set up QEMU
+        if: matrix.arch == 'armv7l'
+        uses: docker/setup-qemu-action@v3
+        with:
+          platforms: arm
       - name: Set Minimum MacOS Target
         if: runner.os == 'macOS'
         run: |
@@ -67,6 +74,7 @@ jobs:
           CIBW_SKIP: "cp310-win_arm64"
           CIBW_TEST_COMMAND: mv {project}/av {project}/av.disabled && python -m pytest {package}/tests && mv {project}/av.disabled {project}/av
           CIBW_TEST_REQUIRES: pytest numpy
+          CIBW_TEST_SKIP: "*_armv7l"
         run: |
           pip install cibuildwheel delvewheel
           cibuildwheel --output-dir dist

av/subtitles/codeccontext.pxd

@@ -4,4 +4,5 @@ from av.packet cimport Packet
 
 cdef class SubtitleCodecContext(CodecContext):
     cdef bint subtitle_header_set
+    cpdef decode(self, Packet packet=?)
     cpdef decode2(self, Packet packet)

scripts/fetch-vendor.py

@@ -4,6 +4,7 @@
 import os
 import platform
 import subprocess
+import time
 
 
 def get_platform():
@@ -51,3 +52,13 @@ def get_platform():
 
 logging.info(f"Extracting {tarball_name}")
 subprocess.check_call(["tar", "-C", args.destination_dir, "-xf", tarball_file])
+
+# Some tarball members carry pre-1980 mtimes, which the ZIP format (and thus
+# delvewheel's wheel repackaging) cannot represent. Bump any such file to now.
+ZIP_EPOCH = 315532800  # 1980-01-01 00:00:00 UTC
+now = time.time()
+for root, _, files in os.walk(args.destination_dir):
+    for name in files:
+        path = os.path.join(root, name)
+        if os.path.getmtime(path) < ZIP_EPOCH:
+            os.utime(path, (now, now))

scripts/ffmpeg-8.1.json

@@ -1,3 +1,3 @@
 {
-    "url": "https://github.com/PyAV-Org/pyav-ffmpeg/releases/download/8.1.1-1/ffmpeg-{platform}.tar.gz"
+    "url": "https://github.com/PyAV-Org/pyav-ffmpeg/releases/download/8.1.1-2/ffmpeg-{platform}.tar.gz"
 }

scripts/ffmpeg-latest.json

@@ -1,3 +1,3 @@
 {
-    "url": "https://github.com/PyAV-Org/pyav-ffmpeg/releases/download/8.1.1-1/ffmpeg-{platform}.tar.gz"
+    "url": "https://github.com/PyAV-Org/pyav-ffmpeg/releases/download/8.1.1-2/ffmpeg-{platform}.tar.gz"
 }

setup.py

@@ -141,6 +141,12 @@ def parse_cflags(raw_flags):
 
 IMPORT_NAME = "av"
 
+# Newer compilers treat incompatible pointer types as an error by default;
+# downgrade it back to a warning so FFmpeg API churn doesn't break the build.
+extra_compile_args = []
+if platform.system() != "Windows":
+    extra_compile_args.append("-Wno-error=incompatible-pointer-types")
+
 loudnorm_extension = Extension(
     f"{IMPORT_NAME}.filter.loudnorm",
     sources=[
@@ -151,6 +157,7 @@ def parse_cflags(raw_flags):
     libraries=extension_extra["libraries"],
     library_dirs=extension_extra["library_dirs"],
     define_macros=define_macros,
+    extra_compile_args=extra_compile_args,
     py_limited_api=py_limited_api,
 )
 
@@ -197,6 +204,7 @@ def parse_cflags(raw_flags):
                 library_dirs=extension_extra["library_dirs"],
                 sources=[pyx_path],
                 define_macros=define_macros,
+                extra_compile_args=extra_compile_args,
                 py_limited_api=py_limited_api,
             ),
             compiler_directives=compiler_directives,