cuei is the Fastest SCTE35 Encoder/ Decoder on the planet. Now with Multicast support. Written in Go. Parses MPEGTS, Bytes, Base64, Hex, Int and more.
License: BSD 3-Clause "New" or "Revised" License
Example app JSON-and-Encode does not use .Identifier="TEST" or .Identifier="" setter? Value is always CUEI string, if providing an empty string my thinking was field could also be skipped in a binary output?
https://github.com/futzu/cuei#load-json-and-encode
Online scte parser for debug use: https://www.middleman.tv/scte35-parser
disclaimer: I don't have a deep knowledge of .Identifer field, I have not seen it other scte35 examples.
Example output:
/DAvAAAAAAAAAAFgFAUAAABvf+/+AAHd5v4AUmXA//8BAgAKAAhDVUVJAAABTDVM1CE=
Example app:
package main
import (
"fmt"
"github.com/futzu/cuei"
)
func main() {
js := `{
"InfoSection": {
"Name": "Splice Info Section",
"TableID": "0xfc",
"SectionSyntaxIndicator": false,
"Private": false,
"ProtocolVersion": 0,
"EncryptedPacket": false,
"EncryptionAlgorithm": 0,
"PtsAdjustment": 0,
"CwIndex": "0x00",
"Tier": "0x16",
"CommandType": 5
},
"Command": {
"Name": "Splice Insert",
"CommandType": 5,
"SpliceEventID": 1,
"OutOfNetworkIndicator": true,
"ProgramSpliceFlag": true,
"TimeSpecifiedFlag": true,
"PTS": 0.0
},
"Descriptors": [
{
"Name": "Avail Descriptor"
}
]
}
`
cue := cuei.Json2Cue(js)
cue.AdjustPts(0.0) // 0..N seconds(float) pts adjustment
cue.Command.PTS = 1.359355 // 0..N seconds(float)
cue.Command.AvailNum = 1
cue.Command.AvailExpected = 2
cue.Command.DurationFlag = true // write BreakDuration+AutoReturn fields
cue.Command.BreakAutoReturn= true
cue.Command.BreakDuration = 60 // 0..N seconds
cue.Command.UniqueProgramID= 65535
cue.Command.SpliceEventID = 111 // 111 or 222 or any 0..N value
cue.Descriptors[0].ProviderAvailID=332
fmt.Println("\nBytes:\n\t", cue.Encode()) // Bytes
fmt.Println("\nBase64:\n\t",cue.Encode2B64()) // Base64
fmt.Println("\nHex:\n\t",cue.Encode2Hex()) // Hex
}
edit: edited example for more common default values for clarity.
When parsing certain SCTE-35 cues I get a panic:
panic: runtime error: slice bounds out of range [:408] with length 400
goroutine 1 [running]:
github.com/futzu/cuei.(*bitDecoder).chunk(0x14000118e40, 0x8)
/Users/oleksiitorunov/go/pkg/mod/github.com/futzu/[email protected]/bitter.go:27 +0xac
github.com/futzu/cuei.(*bitDecoder).uInt64(0x10426bc20?, 0x14000120240?)
/Users/oleksiitorunov/go/pkg/mod/github.com/futzu/[email protected]/bitter.go:55 +0x1c
github.com/futzu/cuei.(*bitDecoder).uInt8(...)
/Users/oleksiitorunov/go/pkg/mod/github.com/futzu/[email protected]/bitter.go:34
github.com/futzu/cuei.(*Descriptor).decodeSegmentation(0x14000118d30, 0x14000118e40)
/Users/oleksiitorunov/go/pkg/mod/github.com/futzu/[email protected]/descriptors.go:211 +0x144
github.com/futzu/cuei.(*Descriptor).segmentationDescriptor(0x14000118d30, 0x14000118e40, 0xb8?, 0x8c?)
/Users/oleksiitorunov/go/pkg/mod/github.com/futzu/[email protected]/descriptors.go:165 +0x118
github.com/futzu/cuei.(*Descriptor).decode(0x0?, 0x2?, 0x0?, 0x0?)
/Users/oleksiitorunov/go/pkg/mod/github.com/futzu/[email protected]/descriptors.go:91 +0x8c
github.com/futzu/cuei.(*Cue).dscptrLoop(0x1400012e040, 0x19, 0x14000118e40)
/Users/oleksiitorunov/go/pkg/mod/github.com/futzu/[email protected]/cue.go:77 +0xc8
github.com/futzu/cuei.(*Cue).decodeBytes(0x1400012e040, {0x14000128040?, 0x14000118ea8?, 0x1?})
/Users/oleksiitorunov/go/pkg/mod/github.com/futzu/[email protected]/cue.go:58 +0xdc
github.com/futzu/cuei.(*Cue).Decode(0x1400012e040, {0x104266f40?, 0x14000118f18?})
/Users/oleksiitorunov/go/pkg/mod/github.com/futzu/[email protected]/cue.go:40 +0x104
The cue I'm attempting to decode: /DA0AAAAAAAAAAAABQb/UN6ZgAAZAhdDVUVJAIdqN3/TAAApMXgICNP3GiIAAL/Pk3w=
Decoding it like this:
c := cuei.NewCue()
ok := c.Decode("/DA0AAAAAAAAAAAABQb/UN6ZgAAZAhdDVUVJAIdqN3/TAAApMXgICNP3GiIAAL/Pk3w=")
if !ok {
fmt.Println("failed to decode")
os.Exit(1)
}
It's worth mentioning that I encoded this cue myself. So I believe it's the encoding that doesn't function properly. For example, if I decode a cue and then encode it again without changing any of its fields I get a somewhat different cue:
c := cuei.NewCue()
ok := c.Decode("/DA0AAAAAAAAAAAABQaB4zZ7tQAeAhxDVUVJAA6GjwDQAAESy7EICAAAAAAA0/cuIgAAXljZSQ==")
if !ok {
fmt.Println("failed to decode")
os.Exit(1)
}
fmt.Println(c.Encode2B64()) // Prints "/DA0AAAAAAAAAAAABQb/4zZ7tQAZAhdDVUVJAA6Gj3/TAAESy7EICNP3LiIAALikDmY="
And then it panics when I try to decode the resulting cue.
Can you take a look into it?
Thanks!
When parsing the following B64:
/DByAAAAAAAAAv/wBQb+AAAAAABcAhRDVUVJUwIu0X/fAAApTwAAACIAAAIWQ1VFSSxMdth/3wAAKU8AAAA0AAAAAAIWQ1VFSRH5kzZ/3wAAKU8AAAA2AAAAAAIUQ1VFSUWu4aR/3wAAKU8AAAAwAADzsyAa
I only see segmentation_type_id 34 and 52. 54 and 48 are missing.
{ "InfoSection": { "Name": "Splice Info Section", "TableID": "0xfc", "SectionSyntaxIndicator": false, "Private": false, "Reserved": "0x3", "SectionLength": 114, "ProtocolVersion": 0, "EncryptedPacket": false, "EncryptionAlgorithm": 0, "PtsAdjustment": 0, "CwIndex": "0x2", "Tier": "0xfff", "CommandLength": 5, "CommandType": 6 }, "Command": { "Name": "Time Signal", "CommandType": 6, "TimeSpecifiedFlag": true }, "DescriptorLoopLength": 92, "Descriptors": [ { "Tag": 2, "Length": 20, "Identifier": "CUEI", "Name": "Segmentation Descriptor", "SegmentationEventID": "0x53022ed1", "ProgramSegmentationFlag": true, "SegmentationDurationFlag": true, "WebDeliveryAllowedFlag": true, "NoRegionalBlackoutFlag": true, "ArchiveAllowedFlag": true, "DeviceRestrictions": "No Restrictions", "SegmentationDuration": 30.08, "SegmentationMessage": "Break Start", "SegmentationTypeID": 34 }, { "Tag": 2, "Length": 22, "Identifier": "CUEI", "Name": "Segmentation Descriptor", "SegmentationEventID": "0x2c4c76d8", "ProgramSegmentationFlag": true, "SegmentationDurationFlag": true, "WebDeliveryAllowedFlag": true, "NoRegionalBlackoutFlag": true, "ArchiveAllowedFlag": true, "DeviceRestrictions": "No Restrictions", "SegmentationDuration": 30.08, "SegmentationMessage": "Provider Placement Opportunity Start", "SegmentationTypeID": 52 }, { "Identifier": "\u0002\u0016CU", "Name": "Avail Descriptor", "ProviderAvailID": 1162416633 }, {} ], "Crc32": 2145320960 }
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