minimal ffmpeg build (#36138)

* min ffmpeg

* remove avfilter

* x264

* merge x264

* simpler

* pin x264

* mac

* rm that

* lil more

* move includes to lfs

* try this

* cleanup

* larch

---------

Co-authored-by: Comma Device <device@comma.ai>

system/loggerd/SConscript

@@ -1,8 +1,8 @@
 Import('env', 'arch', 'messaging', 'common', 'visionipc')
 
 libs = [common, messaging, visionipc,
-        'avformat', 'avcodec', 'avutil',
-        'yuv', 'OpenCL', 'pthread', 'zstd']
+        'yuv', 'OpenCL', 'pthread', 'zstd',
+        'avformat', 'avcodec', 'avutil', 'x264']
 
 src = ['logger.cc', 'zstd_writer.cc', 'video_writer.cc', 'encoder/encoder.cc', 'encoder/v4l_encoder.cc', 'encoder/jpeg_encoder.cc']
 if arch != "larch64":

system/loggerd/tests/test_loggerd.py

@@ -316,8 +316,18 @@ class TestLoggerd:
     self._publish_camera_and_audio_messages()
 
     qcamera_ts_path = os.path.join(self._get_latest_log_dir(), 'qcamera.ts')
-    ffprobe_cmd = f"ffprobe -i {qcamera_ts_path} -show_streams -select_streams a -loglevel error"
-    has_audio_stream = subprocess.run(ffprobe_cmd, shell=True, capture_output=True).stdout.strip() != b''
+
+    # simplest heuristic: look for AAC ADTS syncwords in the TS file
+    def ts_has_audio_stream(ts_path: str) -> bool:
+      try:
+        with open(ts_path, 'rb') as f:
+          data = f.read()
+        # ADTS headers typically start with 0xFFF1 or 0xFFF9
+        return (b"\xFF\xF1" in data) or (b"\xFF\xF9" in data)
+      except Exception:
+        return False
+
+    has_audio_stream = ts_has_audio_stream(qcamera_ts_path)
     assert has_audio_stream == record_audio
 
     raw_audio_in_rlog = any(m.which() == 'rawAudioData' for m in LogReader(os.path.join(self._get_latest_log_dir(), 'rlog.zst')))