Constructs a new PlaylistItem instance from a NamedTuple.

The NamedTuple should contain keys corresponding to the tag attributes, such as: #program_id, #width, #height, #bandwidth, #video, #audio, #uri, #average_bandwidth, #subtitles, #closed_captions, #iframe, #frame_rate, #hdcp_level, #codecs, along with codec-related keys (Codecs#audio_codec, Codecs#level, Codecs#profile).

Example:

options = {
  program_id:        1,
  width:             1920,
  height:            1080,
  bandwidth:         540,
  video:             "test_video",
  audio:             "test_a",
  uri:               "test.url",
  average_bandwidth: 500,
  subtitles:         "subs",
  closed_captions:   "cc",
  iframe:            true,
  frame_rate:        24.6,
  hdcp_level:        "TYPE-0",
  codecs:            "avc",
  audio_codec:       "mp3",
  level:             "2",
  profile:           "baseline",
}
PlaylistItem.new(options)
# => #<M3U8::PlaylistItem:0x7e7089b309c0
#     @audio="test_a",
#     @average_bandwidth=500,
#     @bandwidth=540,
#     @closed_captions="cc",
#     @codecs=#<M3U8::Codecs:0x7e7089adf080 @audio_codec="mp3", @codecs="avc", @level=2.0, @profile="baseline">,
#     @frame_rate=24.6,
#     @hdcp_level="TYPE-0",
#     @height=1080,
#     @iframe=true,
#     @program_id=1,
#     @subtitles="subs",
#     @uri="test.url",
#     @video="test_video",
#     @width=1920>

Initializes a new PlaylistItem instance.

The initializer accepts individual parameters for each attribute.

Example:

PlaylistItem.new(program_id: 1,
  width: 1920,
  height: 1080,
  bandwidth: 540,
  video: "test_video",
  audio: "test_a",
  uri: "test.url",
  average_bandwidth: 500,
  subtitles: "subs",
  closed_captions: "cc",
  iframe: true,
  frame_rate: 24.6,
  hdcp_level: "TYPE-0",
  codecs: "avc",
  audio_codec: "mp3",
  level: "2",
  profile: "baseline")
# => #<M3U8::PlaylistItem:0x7d7806d39900
#     @audio="test_a",
#     @average_bandwidth=500,
#     @bandwidth=540,
#     @closed_captions="cc",
#     @codecs=#<M3U8::Codecs:0x7d7806ce84c0 @audio_codec="mp3", @codecs="avc", @level=2.0, @profile="baseline">,
#     @frame_rate=24.6,
#     @hdcp_level="TYPE-0",
#     @height=1080,
#     @iframe=true,
#     @program_id=1,
#     @subtitles="subs",
#     @uri="test.url",
#     @video="test_video",
#     @width=1920>

Parses a text string representing an EXT-X-STREAM-INF or EXT-X-I-FRAME-STREAM-INF tag.

Example:

text = %(#EXT-X-I-FRAME-STREAM-INF:PROGRAM-ID=1,RESOLUTION=1920x1080, \
         CODECS="avc",BANDWIDTH=540,AVERAGE-BANDWIDTH=500, \
         FRAME-RATE=24.600,HDCP-LEVEL=TYPE-0,AUDIO="test_a", \
         VIDEO="test_video",SUBTITLES="subs",CLOSED-CAPTIONS="cc", \
         URI="test.url")
PlaylistItem.parse(text)
# => #<M3U8::PlaylistItem:0x7bf1a06aca80
#     @audio="test_a",
#     @average_bandwidth=500,
#     @bandwidth=540,
#     @closed_captions="cc",
#     @codecs=#<M3U8::Codecs:0x7bf1a065b180 @audio_codec=nil, @codecs="avc", @level=nil, @profile=nil>,
#     @frame_rate=24.6,
#     @hdcp_level="TYPE-0",
#     @height=1080,
#     @iframe=false,
#     @program_id=1,
#     @subtitles="subs",
#     @uri="test.url",
#     @video="test_video",
#     @width=1920>

The AUDIO attribute, as defined in RFC 8216, Section 4.3.4.2, is a quoted-string that must match the GROUP-ID attribute (MediaItem#group_id) of an EXT-X-MEDIA tag (with TYPE set to AUDIO) in the Master Playlist. This attribute indicates the set of audio renditions that should be used for playback of the presentation.

RFC 8216 defines the following AUDIO attributes:

AUDIO

The value is a quoted-string.  It MUST match the value of the
GROUP-ID attribute of an EXT-X-MEDIA tag elsewhere in the Master
Playlist whose TYPE attribute is AUDIO.  It indicates the set of
audio Renditions that SHOULD be used when playing the
presentation.  See Section 4.3.4.2.1.

The AUDIO attribute is OPTIONAL.

The AUDIO attribute, as defined in RFC 8216, Section 4.3.4.2, is a quoted-string that must match the GROUP-ID attribute (MediaItem#group_id) of an EXT-X-MEDIA tag (with TYPE set to AUDIO) in the Master Playlist. This attribute indicates the set of audio renditions that should be used for playback of the presentation.

RFC 8216 defines the following AUDIO attributes:

AUDIO

The value is a quoted-string.  It MUST match the value of the
GROUP-ID attribute of an EXT-X-MEDIA tag elsewhere in the Master
Playlist whose TYPE attribute is AUDIO.  It indicates the set of
audio Renditions that SHOULD be used when playing the
presentation.  See Section 4.3.4.2.1.

The AUDIO attribute is OPTIONAL.

The AVERAGE-BANDWIDTH attribute represents the average segment bit rate of the Variant Stream, expressed as a decimal integer in bits per second.

RFC 8216 defines the following AVERAGE-BANDWIDTH attributes:

AVERAGE-BANDWIDTH

The value is a decimal-integer of bits per second.  It represents
the average segment bit rate of the Variant Stream.

If all the Media Segments in a Variant Stream have already been
created, the AVERAGE-BANDWIDTH value MUST be the largest sum of
average segment bit rates that is produced by any playable
combination of Renditions.  (For a Variant Stream with a single
Media Playlist, this is just the average segment bit rate of that
Media Playlist.)  An inaccurate value can cause playback stalls or
prevent clients from playing the variant.

If the Master Playlist is to be made available before all Media
Segments in the presentation have been encoded, the AVERAGE-
BANDWIDTH value SHOULD be the AVERAGE-BANDWIDTH value of a
representative period of similar content, encoded using the same
settings.

The AVERAGE-BANDWIDTH attribute is OPTIONAL.

The AVERAGE-BANDWIDTH attribute represents the average segment bit rate of the Variant Stream, expressed as a decimal integer in bits per second.

RFC 8216 defines the following AVERAGE-BANDWIDTH attributes:

AVERAGE-BANDWIDTH

The value is a decimal-integer of bits per second.  It represents
the average segment bit rate of the Variant Stream.

If all the Media Segments in a Variant Stream have already been
created, the AVERAGE-BANDWIDTH value MUST be the largest sum of
average segment bit rates that is produced by any playable
combination of Renditions.  (For a Variant Stream with a single
Media Playlist, this is just the average segment bit rate of that
Media Playlist.)  An inaccurate value can cause playback stalls or
prevent clients from playing the variant.

If the Master Playlist is to be made available before all Media
Segments in the presentation have been encoded, the AVERAGE-
BANDWIDTH value SHOULD be the AVERAGE-BANDWIDTH value of a
representative period of similar content, encoded using the same
settings.

The AVERAGE-BANDWIDTH attribute is OPTIONAL.

According to RFC 8216, Section 4.3.4.2, the BANDWIDTH attribute in an EXT-X-STREAM-INF or EXT-X-I-FRAME-STREAM-INF tag is a decimal integer (in bits per second) that represents the peak segment bit rate of the Variant Stream.

RFC 8216 defines the following BANDWIDTH attributes:

BANDWIDTH

The value is a decimal-integer of bits per second.  It represents
the peak segment bit rate of the Variant Stream.

If all the Media Segments in a Variant Stream have already been
created, the BANDWIDTH value MUST be the largest sum of peak
segment bit rates that is produced by any playable combination of
Renditions.  (For a Variant Stream with a single Media Playlist,
this is just the peak segment bit rate of that Media Playlist.)
An inaccurate value can cause playback stalls or prevent clients
from playing the variant.

If the Master Playlist is to be made available before all Media
Segments in the presentation have been encoded, the BANDWIDTH
value SHOULD be the BANDWIDTH value of a representative period of
similar content, encoded using the same settings.

Every EXT-X-STREAM-INF tag MUST include the BANDWIDTH attribute.

According to RFC 8216, Section 4.3.4.2, the BANDWIDTH attribute in an EXT-X-STREAM-INF or EXT-X-I-FRAME-STREAM-INF tag is a decimal integer (in bits per second) that represents the peak segment bit rate of the Variant Stream.

RFC 8216 defines the following BANDWIDTH attributes:

BANDWIDTH

The value is a decimal-integer of bits per second.  It represents
the peak segment bit rate of the Variant Stream.

If all the Media Segments in a Variant Stream have already been
created, the BANDWIDTH value MUST be the largest sum of peak
segment bit rates that is produced by any playable combination of
Renditions.  (For a Variant Stream with a single Media Playlist,
this is just the peak segment bit rate of that Media Playlist.)
An inaccurate value can cause playback stalls or prevent clients
from playing the variant.

If the Master Playlist is to be made available before all Media
Segments in the presentation have been encoded, the BANDWIDTH
value SHOULD be the BANDWIDTH value of a representative period of
similar content, encoded using the same settings.

Every EXT-X-STREAM-INF tag MUST include the BANDWIDTH attribute.

The CLOSED-CAPTIONS attribute, as defined in RFC 8216, Section 4.3.4.2, indicates the availability of closed captioning for a Variant Stream in an HLS Master Playlist.

This attribute can be provided in one of two forms:

• As a quoted-string: In this case, it must exactly match the GROUP-ID attribute (MediaItem#group_id) of an EXT-X-MEDIA tag (with TYPE CLOSED-CAPTIONS) in the playlist, indicating which closed-caption renditions are available for playback.

• As the enumerated-string value NONE: This signifies that no closed captions are present in any Variant Stream. In such cases, every EXT-X-STREAM-INF tag MUST include "CLOSED-CAPTIONS=NONE".

Consistency is essential; mixing closed captions across Variant Streams may cause playback errors.

RFC 8216 defines the following CLOSED-CAPTIONS attributes:

CLOSED-CAPTIONS

The value can be either a quoted-string or an enumerated-string
with the value NONE.  If the value is a quoted-string, it MUST
match the value of the GROUP-ID attribute of an EXT-X-MEDIA tag
elsewhere in the Playlist whose TYPE attribute is CLOSED-CAPTIONS,
and it indicates the set of closed-caption Renditions that can be
used when playing the presentation.  See Section 4.3.4.2.1.

If the value is the enumerated-string value NONE, all EXT-X-
STREAM-INF tags MUST have this attribute with a value of NONE,
indicating that there are no closed captions in any Variant Stream
in the Master Playlist.  Having closed captions in one Variant
Stream but not another can trigger playback inconsistencies.

The CLOSED-CAPTIONS attribute is OPTIONAL.

The CLOSED-CAPTIONS attribute, as defined in RFC 8216, Section 4.3.4.2, indicates the availability of closed captioning for a Variant Stream in an HLS Master Playlist.

This attribute can be provided in one of two forms:

• As a quoted-string: In this case, it must exactly match the GROUP-ID attribute (MediaItem#group_id) of an EXT-X-MEDIA tag (with TYPE CLOSED-CAPTIONS) in the playlist, indicating which closed-caption renditions are available for playback.

• As the enumerated-string value NONE: This signifies that no closed captions are present in any Variant Stream. In such cases, every EXT-X-STREAM-INF tag MUST include "CLOSED-CAPTIONS=NONE".

Consistency is essential; mixing closed captions across Variant Streams may cause playback errors.

RFC 8216 defines the following CLOSED-CAPTIONS attributes:

CLOSED-CAPTIONS

The value can be either a quoted-string or an enumerated-string
with the value NONE.  If the value is a quoted-string, it MUST
match the value of the GROUP-ID attribute of an EXT-X-MEDIA tag
elsewhere in the Playlist whose TYPE attribute is CLOSED-CAPTIONS,
and it indicates the set of closed-caption Renditions that can be
used when playing the presentation.  See Section 4.3.4.2.1.

If the value is the enumerated-string value NONE, all EXT-X-
STREAM-INF tags MUST have this attribute with a value of NONE,
indicating that there are no closed captions in any Variant Stream
in the Master Playlist.  Having closed captions in one Variant
Stream but not another can trigger playback inconsistencies.

The CLOSED-CAPTIONS attribute is OPTIONAL.

This property holds a Codecs instance that encapsulates the CODECS attribute for a Variant Stream in an HLS playlist.

According to RFC 8216, Section 4.3.4.2, the CODECS attribute is a quoted string that contains a comma-separated list of format identifiers. Each identifier specifies a media sample type present in one or more renditions of the Variant Stream.

RFC 8216 defines the following CODECS attributes:

CODECS

The value is a quoted-string containing a comma-separated list of
formats, where each format specifies a media sample type that is
present in one or more Renditions specified by the Variant Stream.
Valid format identifiers are those in the ISO Base Media File
Format Name Space defined by "The 'Codecs' and 'Profiles'
Parameters for "Bucket" Media Types" [RFC6381].

For example, a stream containing AAC low complexity (AAC-LC) audio
and H.264 Main Profile Level 3.0 video would have a CODECS value
of "mp4a.40.2,avc1.4d401e".

Every EXT-X-STREAM-INF tag SHOULD include a CODECS attribute.

This property holds a Codecs instance that encapsulates the CODECS attribute for a Variant Stream in an HLS playlist.

According to RFC 8216, Section 4.3.4.2, the CODECS attribute is a quoted string that contains a comma-separated list of format identifiers. Each identifier specifies a media sample type present in one or more renditions of the Variant Stream.

RFC 8216 defines the following CODECS attributes:

CODECS

The value is a quoted-string containing a comma-separated list of
formats, where each format specifies a media sample type that is
present in one or more Renditions specified by the Variant Stream.
Valid format identifiers are those in the ISO Base Media File
Format Name Space defined by "The 'Codecs' and 'Profiles'
Parameters for "Bucket" Media Types" [RFC6381].

For example, a stream containing AAC low complexity (AAC-LC) audio
and H.264 Main Profile Level 3.0 video would have a CODECS value
of "mp4a.40.2,avc1.4d401e".

Every EXT-X-STREAM-INF tag SHOULD include a CODECS attribute.

According to RFC 8216, Section 4.3.4.2, the FRAME-RATE attribute specifies the maximum frame rate (in frames per second) for all video in the Variant Stream. This value is expressed as a decimal floating-point number, rounded to three decimal places.

RFC 8216 defines the following FRAME-RATE attributes:

FRAME-RATE

The value is a decimal-floating-point describing the maximum frame
rate for all the video in the Variant Stream, rounded to three
decimal places.

The FRAME-RATE attribute is OPTIONAL but is recommended if the
Variant Stream includes video.  The FRAME-RATE attribute SHOULD be
included if any video in a Variant Stream exceeds 30 frames per
second.

According to RFC 8216, Section 4.3.4.2, the FRAME-RATE attribute specifies the maximum frame rate (in frames per second) for all video in the Variant Stream. This value is expressed as a decimal floating-point number, rounded to three decimal places.

RFC 8216 defines the following FRAME-RATE attributes:

FRAME-RATE

The value is a decimal-floating-point describing the maximum frame
rate for all the video in the Variant Stream, rounded to three
decimal places.

The FRAME-RATE attribute is OPTIONAL but is recommended if the
Variant Stream includes video.  The FRAME-RATE attribute SHOULD be
included if any video in a Variant Stream exceeds 30 frames per
second.

According to RFC 8216, Section 4.3.4.2, the HDCP-LEVEL attribute is defined as an enumerated-string indicating the required level of High-bandwidth Digital Content Protection (HDCP) for a Variant Stream.

Valid values are:

• TYPE-0: Signifies that the Variant Stream may fail to play unless the output is protected by HDCP Type 0 (or an equivalent mechanism).
• NONE: Indicates that the content does not require any output copy protection.

RFC 8216 defines the following HDCP-LEVEL attributes:

HDCP-LEVEL

The value is an enumerated-string; valid strings are TYPE-0 and
NONE.  This attribute is advisory; a value of TYPE-0 indicates
that the Variant Stream could fail to play unless the output is
protected by High-bandwidth Digital Content Protection (HDCP) Type
0 [HDCP] or equivalent.  A value of NONE indicates that the
content does not require output copy protection.

Encrypted Variant Streams with different HDCP levels SHOULD use
different media encryption keys.

The HDCP-LEVEL attribute is OPTIONAL.  It SHOULD be present if any
content in the Variant Stream will fail to play without HDCP.
Clients without output copy protection SHOULD NOT load a Variant
Stream with an HDCP-LEVEL attribute unless its value is NONE.

According to RFC 8216, Section 4.3.4.2, the HDCP-LEVEL attribute is defined as an enumerated-string indicating the required level of High-bandwidth Digital Content Protection (HDCP) for a Variant Stream.

Valid values are:

• TYPE-0: Signifies that the Variant Stream may fail to play unless the output is protected by HDCP Type 0 (or an equivalent mechanism).
• NONE: Indicates that the content does not require any output copy protection.

RFC 8216 defines the following HDCP-LEVEL attributes:

HDCP-LEVEL

The value is an enumerated-string; valid strings are TYPE-0 and
NONE.  This attribute is advisory; a value of TYPE-0 indicates
that the Variant Stream could fail to play unless the output is
protected by High-bandwidth Digital Content Protection (HDCP) Type
0 [HDCP] or equivalent.  A value of NONE indicates that the
content does not require output copy protection.

Encrypted Variant Streams with different HDCP levels SHOULD use
different media encryption keys.

The HDCP-LEVEL attribute is OPTIONAL.  It SHOULD be present if any
content in the Variant Stream will fail to play without HDCP.
Clients without output copy protection SHOULD NOT load a Variant
Stream with an HDCP-LEVEL attribute unless its value is NONE.

According to RFC 8216, Section 4.3.4.2, the RESOLUTION attribute specifies the optimal pixel resolution at which to display all the video in a Variant Stream for an EXT-X-STREAM-INF or EXT-X-I-FRAME-STREAM-INF tag.

The attribute value is expressed as a decimal-resolution (e.g., "1920x1080"). Although it is optional, including the RESOLUTION attribute is recommended when the Variant Stream contains video.

RFC 8216 defines the following RESOLUTION attributes:

RESOLUTION

The value is a decimal-resolution describing the optimal pixel
resolution at which to display all the video in the Variant
Stream.

The RESOLUTION attribute is OPTIONAL but is recommended if the
Variant Stream includes video.

These properties represent the width and height components of that resolution.

According to RFC 8216, Section 4.3.4.2, the RESOLUTION attribute specifies the optimal pixel resolution at which to display all the video in a Variant Stream for an EXT-X-STREAM-INF or EXT-X-I-FRAME-STREAM-INF tag.

The attribute value is expressed as a decimal-resolution (e.g., "1920x1080"). Although it is optional, including the RESOLUTION attribute is recommended when the Variant Stream contains video.

RFC 8216 defines the following RESOLUTION attributes:

RESOLUTION

The value is a decimal-resolution describing the optimal pixel
resolution at which to display all the video in the Variant
Stream.

The RESOLUTION attribute is OPTIONAL but is recommended if the
Variant Stream includes video.

These properties represent the width and height components of that resolution.

Indicates whether the playlist should use an I-frame only stream tag. When #iframe is true, the EXT-X-I-FRAME-STREAM-INF tag will be output, which is typically used for trick play (e.g., fast forward, reverse) as it contains only I-frames. If #iframe is false, the standard EXT-X-STREAM-INF tag is used.

Indicates whether the playlist should use an I-frame only stream tag. When #iframe is true, the EXT-X-I-FRAME-STREAM-INF tag will be output, which is typically used for trick play (e.g., fast forward, reverse) as it contains only I-frames. If #iframe is false, the standard EXT-X-STREAM-INF tag is used.

DEPRECATED Use in EXT-X-MEDIA tag, not in EXT-X-STREAM-INF

DEPRECATED Use in EXT-X-MEDIA tag, not in EXT-X-STREAM-INF

The PROGRAM-ID attribute of the EXT-X-STREAM-INF and the EXT-X-I-FRAME-STREAM-INF tags was removed in protocol version 6.

The PROGRAM-ID attribute of the EXT-X-STREAM-INF and the EXT-X-I-FRAME-STREAM-INF tags was removed in protocol version 6.

Returns the resolution in the format <width>x<height>.

Example:

options = {width: 1920, height: 1080}
item = PlaylistItem.new(options)
item.resolution # => "1920x1080"

The SUBTITLES attribute, as defined in RFC 8216, Section 4.3.4.2, is a quoted-string that must match the GROUP-ID attribute (MediaItem#group_id) of an EXT-X-MEDIA tag (with TYPE set to SUBTITLES) in the Master Playlist. It indicates the set of subtitle renditions available for playback.

RFC 8216 defines the following SUBTITLES attributes:

SUBTITLES

The value is a quoted-string.  It MUST match the value of the
GROUP-ID attribute of an EXT-X-MEDIA tag elsewhere in the Master
Playlist whose TYPE attribute is SUBTITLES.  It indicates the set
of subtitle Renditions that can be used when playing the
presentation.  See Section 4.3.4.2.1.

The SUBTITLES attribute is OPTIONAL.

The SUBTITLES attribute, as defined in RFC 8216, Section 4.3.4.2, is a quoted-string that must match the GROUP-ID attribute (MediaItem#group_id) of an EXT-X-MEDIA tag (with TYPE set to SUBTITLES) in the Master Playlist. It indicates the set of subtitle renditions available for playback.

RFC 8216 defines the following SUBTITLES attributes:

SUBTITLES

The value is a quoted-string.  It MUST match the value of the
GROUP-ID attribute of an EXT-X-MEDIA tag elsewhere in the Master
Playlist whose TYPE attribute is SUBTITLES.  It indicates the set
of subtitle Renditions that can be used when playing the
presentation.  See Section 4.3.4.2.1.

The SUBTITLES attribute is OPTIONAL.

Returns the string representation of the stream info tag.

If the #iframe flag is true, the tag is formatted as EXT-X-I-FRAME-STREAM-INF; otherwise, it is formatted as EXT-X-STREAM-INF followed by the URI on a new line.

Example for an I-frame stream:

options = {
  program_id:        1,
  width:             1920,
  height:            1080,
  bandwidth:         540,
  video:             "test_video",
  audio:             "test_a",
  uri:               "test.url",
  average_bandwidth: 500,
  subtitles:         "subs",
  closed_captions:   "cc",
  iframe:            true,
  frame_rate:        24.6,
  hdcp_level:        "TYPE-0",
  codecs:            "avc",
  audio_codec:       "mp3",
  level:             "2",
  profile:           "baseline",
}
PlaylistItem.new(options).to_s
# => "#EXT-X-I-FRAME-STREAM-INF:PROGRAM-ID=1,RESOLUTION=1920x1080,CODECS=\"avc\",BANDWIDTH=540,AVERAGE-BANDWIDTH=500,FRAME-RATE=24.600,HDCP-LEVEL=TYPE-0,AUDIO=\"test_a\",VIDEO=\"test_video\",SUBTITLES=\"subs\",CLOSED-CAPTIONS=\"cc\",URI=\"test.url\""

Example for a standard stream:

options = {
  program_id:        1,
  width:             1920,
  height:            1080,
  bandwidth:         540,
  video:             "test_video",
  audio:             "test_a",
  uri:               "test.url",
  average_bandwidth: 500,
  subtitles:         "subs",
  closed_captions:   "cc",
  iframe:            false,
  frame_rate:        24.6,
  hdcp_level:        "TYPE-0",
  codecs:            "avc",
  audio_codec:       "mp3",
  level:             "2",
  profile:           "baseline",
}
PlaylistItem.new(options).to_s
# => "#EXT-X-STREAM-INF:PROGRAM-ID=1,RESOLUTION=1920x1080,CODECS=\"avc\",BANDWIDTH=540,AVERAGE-BANDWIDTH=500,FRAME-RATE=24.600,HDCP-LEVEL=TYPE-0,AUDIO=\"test_a\",VIDEO=\"test_video\",SUBTITLES=\"subs\",CLOSED-CAPTIONS=\"cc\"\n" +
#    "test.url"

As defined in RFC 8216, Section 4.3.4.3, the URI attribute for EXT-X-I-FRAME-STREAM-INF tags is a quoted-string containing a URI that identifies the I-frame Media Playlist file. This playlist file MUST include an EXT-X-I-FRAMES-ONLY tag.

RFC 8216, Section 4.3.4.3 defines the following URI attributes:

URI

The value is a quoted-string containing a URI that identifies the
I-frame Media Playlist file.  That Playlist file MUST contain an
EXT-X-I-FRAMES-ONLY tag.

As defined in RFC 8216, Section 4.3.4.3, the URI attribute for EXT-X-I-FRAME-STREAM-INF tags is a quoted-string containing a URI that identifies the I-frame Media Playlist file. This playlist file MUST include an EXT-X-I-FRAMES-ONLY tag.

RFC 8216, Section 4.3.4.3 defines the following URI attributes:

URI

The value is a quoted-string containing a URI that identifies the
I-frame Media Playlist file.  That Playlist file MUST contain an
EXT-X-I-FRAMES-ONLY tag.

The VIDEO attribute, as specified in RFC 8216, Section 4.3.4.2, is defined as a quoted-string that must match the GROUP-ID attribute (MediaItem#group_id) of an EXT-X-MEDIA tag with TYPE set to VIDEO in the Master Playlist. This attribute designates the set of video renditions to be used for playback.

RFC 8216 defines the following VIDEO attributes:

VIDEO

The value is a quoted-string.  It MUST match the value of the
GROUP-ID attribute of an EXT-X-MEDIA tag elsewhere in the Master
Playlist whose TYPE attribute is VIDEO.  It indicates the set of
video Renditions that SHOULD be used when playing the
presentation.  See Section 4.3.4.2.1.

The VIDEO attribute is OPTIONAL.

The VIDEO attribute, as specified in RFC 8216, Section 4.3.4.2, is defined as a quoted-string that must match the GROUP-ID attribute (MediaItem#group_id) of an EXT-X-MEDIA tag with TYPE set to VIDEO in the Master Playlist. This attribute designates the set of video renditions to be used for playback.

RFC 8216 defines the following VIDEO attributes:

VIDEO

The value is a quoted-string.  It MUST match the value of the
GROUP-ID attribute of an EXT-X-MEDIA tag elsewhere in the Master
Playlist whose TYPE attribute is VIDEO.  It indicates the set of
video Renditions that SHOULD be used when playing the
presentation.  See Section 4.3.4.2.1.

The VIDEO attribute is OPTIONAL.

According to RFC 8216, Section 4.3.4.2, the RESOLUTION attribute specifies the optimal pixel resolution at which to display all the video in a Variant Stream for an EXT-X-STREAM-INF or EXT-X-I-FRAME-STREAM-INF tag.

The attribute value is expressed as a decimal-resolution (e.g., "1920x1080"). Although it is optional, including the RESOLUTION attribute is recommended when the Variant Stream contains video.

RFC 8216 defines the following RESOLUTION attributes:

RESOLUTION

The value is a decimal-resolution describing the optimal pixel
resolution at which to display all the video in the Variant
Stream.

The RESOLUTION attribute is OPTIONAL but is recommended if the
Variant Stream includes video.

These properties represent the width and height components of that resolution.

According to RFC 8216, Section 4.3.4.2, the RESOLUTION attribute specifies the optimal pixel resolution at which to display all the video in a Variant Stream for an EXT-X-STREAM-INF or EXT-X-I-FRAME-STREAM-INF tag.

The attribute value is expressed as a decimal-resolution (e.g., "1920x1080"). Although it is optional, including the RESOLUTION attribute is recommended when the Variant Stream contains video.

RFC 8216 defines the following RESOLUTION attributes:

RESOLUTION

The value is a decimal-resolution describing the optimal pixel
resolution at which to display all the video in the Variant
Stream.

The RESOLUTION attribute is OPTIONAL but is recommended if the
Variant Stream includes video.

These properties represent the width and height components of that resolution.