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import os
from fractions import Fraction
import pytest
import av
import av.datasets
from .common import fate_suite
class TestStreams:
@pytest.fixture(autouse=True)
def cleanup(self):
yield
for file in (
"data.ts",
"data_source.ts",
"data_copy.ts",
"out.mkv",
"video_with_attachment.mkv",
"remuxed_attachment.mkv",
):
if os.path.exists(file):
os.remove(file)
def test_stream_tuples(self) -> None:
for fate_name in ("h264/interlaced_crop.mp4",):
container = av.open(fate_suite(fate_name))
video_streams = tuple([s for s in container.streams if s.type == "video"])
assert video_streams == container.streams.video
audio_streams = tuple([s for s in container.streams if s.type == "audio"])
assert audio_streams == container.streams.audio
def test_loudnorm(self) -> None:
container = av.open(
fate_suite("amv/MTV_high_res_320x240_sample_Penguin_Joke_MTV_from_WMV.amv")
)
audio = container.streams.audio[0]
stats = av.filter.loudnorm.stats("i=-24.0:lra=7.0:tp=-2.0", audio)
assert isinstance(stats, bytes) and len(stats) > 30
assert b"inf" not in stats
assert b'"input_i"' in stats
def test_selection(self) -> None:
container = av.open(
fate_suite("amv/MTV_high_res_320x240_sample_Penguin_Joke_MTV_from_WMV.amv")
)
video = container.streams.video[0]
video.thread_type = av.codec.context.ThreadType.AUTO
assert video.thread_type == av.codec.context.ThreadType.AUTO
video.thread_type = 0x03
assert video.thread_type == av.codec.context.ThreadType.AUTO
video.thread_type = "AUTO"
assert video.thread_type == av.codec.context.ThreadType.AUTO
audio = container.streams.audio[0]
assert [video] == container.streams.get(video=0)
assert [video] == container.streams.get(video=(0,))
assert video == container.streams.best("video")
assert audio == container.streams.best("audio")
container = av.open(fate_suite("sub/MovText_capability_tester.mp4"))
subtitle = container.streams.subtitles[0]
assert subtitle == container.streams.best("subtitle")
container = av.open(fate_suite("mxf/track_01_v02.mxf"))
data = container.streams.data[0]
assert data == container.streams.best("data")
def test_printing_video_stream(self) -> None:
input_ = av.open(
fate_suite("amv/MTV_high_res_320x240_sample_Penguin_Joke_MTV_from_WMV.amv")
)
container = av.open("out.mkv", "w")
video_stream = container.add_stream("h264", rate=30)
encoder = video_stream.codec.name
video_stream.width = input_.streams.video[0].width
video_stream.height = input_.streams.video[0].height
video_stream.pix_fmt = "yuv420p"
for frame in input_.decode(video=0):
container.mux(video_stream.encode(frame))
break
repr = f"{video_stream}"
assert repr.startswith(f"<av.VideoStream #0 {encoder}, yuv420p 160x120 at ")
assert repr.endswith(">")
container.close()
input_.close()
def test_printing_video_stream2(self) -> None:
input_ = av.open(fate_suite("h264/interlaced_crop.mp4"))
input_stream = input_.streams.video[0]
container = av.open("out.mkv", "w")
video_stream = container.add_stream_from_template(input_stream)
encoder = video_stream.codec.name
for frame in input_.decode(video=0):
container.mux(video_stream.encode(frame))
break
repr = f"{video_stream}"
assert repr.startswith(f"<av.VideoStream #0 {encoder}, yuv420p 640x360 at ")
assert repr.endswith(">")
container.close()
input_.close()
def test_data_stream(self) -> None:
# First test writing and reading a simple data stream
container1 = av.open("data.ts", "w")
data_stream = container1.add_data_stream()
test_data = [b"test data 1", b"test data 2", b"test data 3"]
for i, data_ in enumerate(test_data):
packet = av.Packet(data_)
packet.pts = i
packet.stream = data_stream
container1.mux(packet)
container1.close()
# Test reading back the data stream
container = av.open("data.ts")
# Test best stream selection
data = container.streams.best("data")
assert data == container.streams.data[0]
# Test get method
assert [data] == container.streams.get(data=0)
assert [data] == container.streams.get(data=(0,))
# Verify we can read back all the packets, ignoring empty ones
packets = [p for p in container.demux(data) if bytes(p)]
assert len(packets) == len(test_data)
for packet, original_data in zip(packets, test_data):
assert bytes(packet) == original_data
# Test string representation
repr = f"{data_stream}"
assert repr.startswith("<av.DataStream #0") and repr.endswith(">")
container.close()
def test_data_stream_from_template(self) -> None:
source_path = "data_source.ts"
payloads = [b"payload-a", b"payload-b", b"payload-c"]
with av.open(source_path, "w") as source:
source_stream = source.add_data_stream()
for i, payload in enumerate(payloads):
packet = av.Packet(payload)
packet.pts = i
packet.stream = source_stream
source.mux(packet)
copied_payloads: list[bytes] = []
with av.open(source_path) as input_container:
input_data_stream = input_container.streams.data[0]
with av.open("data_copy.ts", "w") as output_container:
output_data_stream = output_container.add_stream_from_template(
input_data_stream
)
for packet in input_container.demux(input_data_stream):
payload = bytes(packet)
if not payload:
continue
copied_payloads.append(payload)
clone = av.Packet(payload)
clone.pts = packet.pts
clone.dts = packet.dts
clone.time_base = packet.time_base
clone.stream = output_data_stream
output_container.mux(clone)
with av.open("data_copy.ts") as remuxed:
output_stream = remuxed.streams.data[0]
assert output_stream.codec_context is None
remuxed_payloads: list[bytes] = []
for packet in remuxed.demux(output_stream):
payload = bytes(packet)
if payload:
remuxed_payloads.append(payload)
assert remuxed_payloads == copied_payloads
def test_attachment_stream(self) -> None:
input_path = av.datasets.curated(
"pexels/time-lapse-video-of-night-sky-857195.mp4"
)
input_ = av.open(input_path)
out1_path = "video_with_attachment.mkv"
with av.open(out1_path, "w") as out1:
out1.add_attachment(
name="attachment.txt", mimetype="text/plain", data=b"hello\n"
)
in_v = input_.streams.video[0]
out_v = out1.add_stream_from_template(in_v)
for packet in input_.demux(in_v):
if packet.dts is None:
continue
packet.stream = out_v
out1.mux(packet)
input_.close()
with av.open(out1_path) as c:
attachments = c.streams.attachments
assert len(attachments) == 1
att = attachments[0]
assert att.name == "attachment.txt"
assert att.mimetype == "text/plain"
assert att.data == b"hello\n"
out2_path = "remuxed_attachment.mkv"
with av.open(out1_path) as ic, av.open(out2_path, "w") as oc:
stream_map = {}
for s in ic.streams:
stream_map[s.index] = oc.add_stream_from_template(s)
for packet in ic.demux(ic.streams.video):
if packet.dts is None:
continue
packet.stream = stream_map[packet.stream.index]
oc.mux(packet)
with av.open(out2_path) as c:
attachments = c.streams.attachments
assert len(attachments) == 1
att = attachments[0]
assert att.name == "attachment.txt"
assert att.mimetype == "text/plain"
assert att.data == b"hello\n"
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