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Implement buffer reset method for stream transitions

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Added a method to reset internal buffers to prevent corruption during stream transitions.
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cmcpherson274 2026-03-15 12:06:32 -04:00 • committed by GitHub
parent 5b9b0162da
commit cf1aef6747
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1 changed files with 34 additions and 0 deletions
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34
apps/proxy/ts_proxy/stream_buffer.py
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@ -132,6 +132,40 @@ class StreamBuffer:
logger.error(f"Error adding chunk to buffer: {e}")
return False
def reset_buffer_position(self):
"""
Reset internal buffers for a clean stream transition (failover).
Called by stream_manager.update_url() when switching between FFmpeg
processes. Without this, _partial_packet from the old FFmpeg gets
concatenated with the first bytes from the new FFmpeg, creating
corrupted TS packets that break audio decoder sync in the client.
"""
try:
with self.lock:
old_write_size = len(self._write_buffer)
old_partial_size = len(getattr(self, '_partial_packet', b''))
self._write_buffer = bytearray()
if hasattr(self, '_partial_packet'):
self._partial_packet = bytearray()
if old_write_size > 0 or old_partial_size > 0:
logger.info(
f"Reset buffer position for channel {self.channel_id}: "
f"cleared {old_write_size} bytes from write buffer, "
f"{old_partial_size} bytes from partial packet"
)
else:
logger.debug(
f"Reset buffer position for channel {self.channel_id}: "
f"buffers were already clean"
)
except Exception as e:
logger.error(
f"Error resetting buffer position for channel {self.channel_id}: {e}"
)
def get_chunks(self, start_index=None):
"""Get chunks from the buffer with detailed logging"""
try: