Add ffdecodetest.py.

ffdecodetest.py

@@ -0,0 +1,80 @@
+import os
+import argparse
+import subprocess
+import sys
+
+from voussoirkit import betterhelp
+from voussoirkit import spinal
+from voussoirkit import pathclass
+from voussoirkit import pipeable
+from voussoirkit import vlogging
+from voussoirkit import winwhich
+
+log = vlogging.getLogger(__name__, 'ffdecodetest')
+
+def ffdecodetest_argparse(args):
+    FFMPEG = pathclass.Path(winwhich.which('ffmpeg'))
+    patterns = pipeable.input_many(args.patterns)
+    if args.recurse:
+        files = spinal.walk(glob_filenames=patterns)
+    else:
+        files = (file for pattern in patterns for file in pathclass.glob_files(pattern))
+
+    goods = 0
+    bads = 0
+
+    for file in files:
+        command = [
+            FFMPEG.absolute_path,
+            '-i', file.absolute_path,
+            '-f', 'null',
+            os.devnull,
+        ]
+        log.debug(command)
+        process = subprocess.Popen(
+            command,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.STDOUT,
+        )
+        success = True
+        for line in process.stdout:
+            # If you have more comprehensive tests, let me know.
+            if b'Error while decoding' in line or b'broken header' in line:
+                success = False
+                for line in process.stdout:
+                    pass
+                break
+        process.communicate()
+        success = success and process.returncode == 0
+        if success:
+            log.info(f'{file.absolute_path} ok.')
+            goods += 1
+        else:
+            log.error(f'{file.absolute_path} failed.')
+            bads += 1
+
+    if bads > 0:
+        log.warning(f'{goods} ok, {bads} failed.')
+        return 1
+    else:
+        log.info(f'{goods} ok, {bads} failed.')
+        return 0
+
+@vlogging.main_decorator
+def main(argv):
+    parser = argparse.ArgumentParser(
+        description='''
+        Uses FFMPEG to decode the input files, testing their validity.
+        ''',
+    )
+    parser.add_argument(
+        'patterns',
+        nargs='+',
+    )
+    parser.add_argument('--recurse', action='store_true')
+    parser.set_defaults(func=ffdecodetest_argparse)
+
+    return betterhelp.go(parser, argv)
+
+if __name__ == '__main__':
+    raise SystemExit(main(sys.argv[1:]))