async def run_until_complete(self) -> None:
if self.is_started:
raise StreamError("ffmpeg command already started")
await self.start()
if self.process is None:
raise StreamError("Could not start stream")
await asyncio.wait([
self._read_stream(self.process.stdout, "stdout"),
self._read_stream(self.process.stderr, "stderr")
])
await self.process.wait()
def is_error(self) -> bool:
if self.process is None:
raise StreamError("ffmpeg has not started")
if self.is_running:
return False
return self.process.returncode != 0
async def start(self) -> None:
if self.is_started:
raise StreamError("ffmpeg command already started")
if self.ffmpeg_path is None:
system_ffmpeg = await which("ffmpeg")
if system_ffmpeg is None:
raise StreamError("Could not find ffmpeg")
self.ffmpeg_path = Path(system_ffmpeg)
if not self.ffmpeg_path.exists():
raise StreamError("Could not find ffmpeg")
self.process = await create_subprocess_exec(self.ffmpeg_path,
*self.args,
stdout=PIPE,
stderr=PIPE)
async def play_audio(self,
content_url: str,
ffmpeg_path: Optional[Path] = None) -> None:
"""
Plays audio to a camera through its speaker.
Requires ffmpeg to use.
Args:
* `content_url`: Either a URL accessible by python or a path to a file (ffmepg's `-i` parameter)
* `ffmpeg_path`: Optional path to ffmpeg binary
"""
stream = self.create_talkback_stream(content_url, ffmpeg_path)
await stream.run_until_complete()
_LOGGER.debug("ffmpeg stdout:\n%s", "\n".join(stream.stdout))
_LOGGER.debug("ffmpeg stderr:\n%s", "\n".join(stream.stderr))
if stream.is_error:
error = "\n".join(stream.stderr)
raise StreamError("Error while playing audio (ffmpeg): \n" + error)
async def stop(self) -> None:
if self.process is None:
raise StreamError("ffmpeg has not started")
self.process.kill()
await self.process.wait()