1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
<!doctype html>
<html>
<head>
<title>MediaRecorder MIMEType</title>
<link rel="help" href="https://w3c.github.io/mediacapture-record/MediaRecorder.html#dom-mediarecorder-mimetype">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<canvas id="canvas" width="200" height="200">
</canvas>
<script>
function createAudioStream(t) {
const ac = new AudioContext();
const dest = ac.createMediaStreamDestination();
const osc = ac.createOscillator();
osc.connect(dest);
osc.start();
const [track] = dest.stream.getTracks();
t.add_cleanup(() => track.stop());
return dest.stream;
}
function createVideoStream(t) {
const canvas = document.getElementById("canvas");
const ctx = canvas.getContext('2d');
const stream = canvas.captureStream();
const [track] = stream.getTracks();
t.add_cleanup(() => track.stop());
ctx.fillStyle = 'green';
requestAnimationFrame(function draw() {
ctx.fillRect(0, 0, canvas.width, canvas.height);
if (track.readyState == "live") {
requestAnimationFrame(draw);
}
});
return stream;
}
function createAudioVideoStream(t) {
return new MediaStream([
...createAudioStream(t).getTracks(),
...createVideoStream(t).getTracks(),
]);
}
test(t => {
const recorder = new MediaRecorder(createAudioStream(t));
assert_equals(recorder.mimeType, "",
"MediaRecorder has no default MIMEtype");
}, "MediaRecorder sets no default MIMEType in the constructor for audio");
test(t => {
const recorder = new MediaRecorder(createVideoStream(t));
assert_equals(recorder.mimeType, "",
"MediaRecorder has no default MIMEtype");
}, "MediaRecorder sets no default MIMEType in the constructor for video");
test(t => {
const stream = createAudioVideoStream(t);
const recorder = new MediaRecorder(stream);
assert_equals(recorder.mimeType, "",
"MediaRecorder has no default MIMEtype");
}, "MediaRecorder sets no default MIMEType in the constructor for audio/video");
test(t => {
assert_throws("NotSupportedError",
() => new MediaRecorder(new MediaStream(), {mimeType: "audio/banana"}));
}, "MediaRecorder invalid audio MIMEType throws");
test(t => {
assert_false(MediaRecorder.isTypeSupported("audio/banana"));
}, "MediaRecorder invalid audio MIMEType is unsupported");
test(t => {
assert_throws("NotSupportedError",
() => new MediaRecorder(new MediaStream(), {mimeType: "video/pineapple"}));
}, "MediaRecorder invalid video MIMEType throws");
test(t => {
assert_false(MediaRecorder.isTypeSupported("video/pineapple"));
}, "MediaRecorder invalid video MIMEType is unsupported");
// New MIME types could be added to this list as needed.
for (const mimeType of [
'audio/mp4',
'video/mp4',
'audio/ogg',
'audio/ogg; codecs="vorbis"',
'audio/ogg; codecs="opus"',
'audio/webm',
'audio/webm; codecs="vorbis"',
'audio/webm; codecs="opus"',
'video/webm',
'video/webm; codecs="vp8"',
'video/webm; codecs="vp8, vorbis"',
'video/webm; codecs="vp8, opus"',
'video/webm; codecs="vp9"',
'video/webm; codecs="vp9, vorbis"',
'video/webm; codecs="vp9, opus"',
'video/webm; codecs="av1"',
'video/webm; codecs="av1, opus"',
]) {
if (MediaRecorder.isTypeSupported(mimeType)) {
test(t => {
const recorder = new MediaRecorder(new MediaStream(), {mimeType});
assert_equals(recorder.mimeType, mimeType, "Supported MIMEType is set");
}, `Supported MIMEType ${mimeType} is set immediately after constructing`);
} else {
test(t => {
assert_throws("NotSupportedError",
() => new MediaRecorder(new MediaStream(), {mimeType}));
}, `Unsupported MIMEType ${mimeType} throws`);
}
}
promise_test(async t => {
const recorder = new MediaRecorder(createAudioStream(t));
recorder.start();
assert_equals(recorder.mimeType, "",
"MediaRecorder has no MIMEtype after start() for audio");
await new Promise(r => recorder.onstart = r);
assert_not_equals(recorder.mimeType, "",
"MediaRecorder has a MIMEtype after 'start' for audio");
assert_regexp_match(recorder.mimeType, /^audio\//,
"MIMEtype has an expected media type");
assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+/,
"MIMEtype has a container subtype");
assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+; codecs=[^,]+$/,
"MIMEtype has one codec");
}, "MediaRecorder sets a MIMEType after 'start' for audio");
promise_test(async t => {
const recorder = new MediaRecorder(createVideoStream(t));
recorder.start();
assert_equals(recorder.mimeType, "",
"MediaRecorder has no MIMEtype after start() for video");
await new Promise(r => recorder.onstart = r);
assert_not_equals(recorder.mimeType, "",
"MediaRecorder has a MIMEtype after 'start' for video");
assert_regexp_match(recorder.mimeType, /^video\//,
"MIMEtype has an expected media type");
assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+/,
"MIMEtype has a container subtype");
assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+; codecs=[^,]+$/,
"MIMEtype has one codec");
}, "MediaRecorder sets a MIMEType after 'start' for video");
promise_test(async t => {
const recorder = new MediaRecorder(createAudioVideoStream(t));
recorder.start();
assert_equals(recorder.mimeType, "",
"MediaRecorder has no MIMEtype after start() for audio/video");
await new Promise(r => recorder.onstart = r);
assert_not_equals(recorder.mimeType, "",
"MediaRecorder has a MIMEtype after 'start' for audio/video");
assert_regexp_match(recorder.mimeType, /^video\//,
"MIMEtype has an expected media type");
assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+/,
"MIMEtype has a container subtype");
assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+; codecs=[^,]+,[^,]+$/,
"MIMEtype has two codecs");
}, "MediaRecorder sets a MIMEType after 'start' for audio/video");
</script>
</body>
</html>
|