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Refactor av.open calls to support type annotations (#129688)

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Marc Mueller 2024-11-02 19:03:32 +01:00 committed by GitHub
parent bf4922a7ef
commit f7103da818
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2 changed files with 60 additions and 60 deletions
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13
homeassistant/components/stream/recorder.py
View File

@ -105,17 +105,16 @@ class RecorderOutput(StreamOutput):
# Create output on first segment
if not output:
container_options: dict[str, str] = {
"video_track_timescale": str(int(1 / source_v.time_base)),
"movflags": "frag_keyframe+empty_moov",
"min_frag_duration": str(self.stream_settings.min_segment_duration),
}
output = av.open(
self.video_path + ".tmp",
"w",
format=RECORDER_CONTAINER_FORMAT,
container_options={
"video_track_timescale": str(int(1 / source_v.time_base)),
"movflags": "frag_keyframe+empty_moov",
"min_frag_duration": str(
self.stream_settings.min_segment_duration
),
},
container_options=container_options,
)
# Add output streams if necessary

107
homeassistant/components/stream/worker.py
View File

@ -164,63 +164,64 @@ class StreamMuxer:
av.audio.stream.AudioStream | None,
]:
"""Make a new av OutputContainer and add output streams."""
container_options: dict[str, str] = {
# Removed skip_sidx - see:
# https://github.com/home-assistant/core/pull/39970
# "cmaf" flag replaces several of the movflags used,
# but too recent to use for now
"movflags": "frag_custom+empty_moov+default_base_moof+frag_discont+negative_cts_offsets+skip_trailer+delay_moov",
# Sometimes the first segment begins with negative timestamps,
# and this setting just
# adjusts the timestamps in the output from that segment to start
# from 0. Helps from having to make some adjustments
# in test_durations
"avoid_negative_ts": "make_non_negative",
"fragment_index": str(sequence + 1),
"video_track_timescale": str(int(1 / input_vstream.time_base)),
# Only do extra fragmenting if we are using ll_hls
# Let ffmpeg do the work using frag_duration
# Fragment durations may exceed the 15% allowed variance but it seems ok
**(
{
"movflags": "empty_moov+default_base_moof+frag_discont+negative_cts_offsets+skip_trailer+delay_moov",
# Create a fragment every TARGET_PART_DURATION. The data from
# each fragment is stored in a "Part" that can be combined with
# the data from all the other "Part"s, plus an init section,
# to reconstitute the data in a "Segment".
#
# The LL-HLS spec allows for a fragment's duration to be within
# the range [0.85x,1.0x] of the part target duration. We use the
# frag_duration option to tell ffmpeg to try to cut the
# fragments when they reach frag_duration. However,
# the resulting fragments can have variability in their
# durations and can end up being too short or too long. With a
# video track with no audio, the discrete nature of frames means
# that the frame at the end of a fragment will sometimes extend
# slightly beyond the desired frag_duration.
#
# If there are two tracks, as in the case of a video feed with
# audio, there is an added wrinkle as the fragment cut seems to
# be done on the first track that crosses the desired threshold,
# and cutting on the audio track may also result in a shorter
# video fragment than desired.
#
# Given this, our approach is to give ffmpeg a frag_duration
# somewhere in the middle of the range, hoping that the parts
# stay pretty well bounded, and we adjust the part durations
# a bit in the hls metadata so that everything "looks" ok.
"frag_duration": str(
int(self._stream_settings.part_target_duration * 9e5)
),
}
if self._stream_settings.ll_hls
else {}
),
}
container = av.open(
memory_file,
mode="w",
format=SEGMENT_CONTAINER_FORMAT,
container_options={
# Removed skip_sidx - see:
# https://github.com/home-assistant/core/pull/39970
# "cmaf" flag replaces several of the movflags used,
# but too recent to use for now
"movflags": "frag_custom+empty_moov+default_base_moof+frag_discont+negative_cts_offsets+skip_trailer+delay_moov",
# Sometimes the first segment begins with negative timestamps,
# and this setting just
# adjusts the timestamps in the output from that segment to start
# from 0. Helps from having to make some adjustments
# in test_durations
"avoid_negative_ts": "make_non_negative",
"fragment_index": str(sequence + 1),
"video_track_timescale": str(int(1 / input_vstream.time_base)),
# Only do extra fragmenting if we are using ll_hls
# Let ffmpeg do the work using frag_duration
# Fragment durations may exceed the 15% allowed variance but it seems ok
**(
{
"movflags": "empty_moov+default_base_moof+frag_discont+negative_cts_offsets+skip_trailer+delay_moov",
# Create a fragment every TARGET_PART_DURATION. The data from
# each fragment is stored in a "Part" that can be combined with
# the data from all the other "Part"s, plus an init section,
# to reconstitute the data in a "Segment".
#
# The LL-HLS spec allows for a fragment's duration to be within
# the range [0.85x,1.0x] of the part target duration. We use the
# frag_duration option to tell ffmpeg to try to cut the
# fragments when they reach frag_duration. However,
# the resulting fragments can have variability in their
# durations and can end up being too short or too long. With a
# video track with no audio, the discrete nature of frames means
# that the frame at the end of a fragment will sometimes extend
# slightly beyond the desired frag_duration.
#
# If there are two tracks, as in the case of a video feed with
# audio, there is an added wrinkle as the fragment cut seems to
# be done on the first track that crosses the desired threshold,
# and cutting on the audio track may also result in a shorter
# video fragment than desired.
#
# Given this, our approach is to give ffmpeg a frag_duration
# somewhere in the middle of the range, hoping that the parts
# stay pretty well bounded, and we adjust the part durations
# a bit in the hls metadata so that everything "looks" ok.
"frag_duration": str(
int(self._stream_settings.part_target_duration * 9e5)
),
}
if self._stream_settings.ll_hls
else {}
),
},
container_options=container_options,
)
output_vstream = container.add_stream(template=input_vstream)
# Check if audio is requested