How to set or not set audio selector in AWS media convert? - amazon-web-services

Question

I got this error, when creating job for AWS media convert:
Invalid selector_sequence_id [0] specified for audio_description [1].
I do not even need sound for my output mp4 video.
My intention is to loop for 2 second an image (png or jpg) and add a fade effect for the first frames.
How would you change the sent json?
{
"middlewareStack": {},
"input": {
"Queue": "arn:aws:mediaconvert:eu-central-1:634617701827:queues/Default",
"UserMetadata": {},
"Role": "arn:aws:iam::634617701827:role/service-role/MediaConvert_Default_Role",
"Settings": {
"TimecodeConfig": {
"Anchor": "00:00:00:00",
"Source": "EMBEDDED"
},
"OutputGroups": [
{
"Name": "File Group",
"Outputs": [
{
"Preset": "createPromoVideo",
"Extension": "mp4",
"NameModifier": "_fade",
"VideoDescription": {
"CodecSettings": {
"FilterGraph": "fade=out:150:30"
},
"ScalingBehavior": "DEFAULT",
"TimecodeInsertion": "DISABLED",
"AntiAlias": "ENABLED",
"Sharpness": 50,
"Height": 1080,
"Width": 1080
},
"AudioDescriptions": [
{
"AudioSelector": {
"SelectorSettings": [
{
"AudioSelectorName": "Default"
}
]
},
"CodecSettings": {
"Codec": "AAC",
"AacSettings": {
"Bitrate": 96000,
"CodingMode": "CODING_MODE_2_0",
"SampleRate": 48000
}
}
}
]
}
],
"OutputGroupSettings": {
"Type": "FILE_GROUP_SETTINGS",
"FileGroupSettings": {
"Destination": "s3://t44-post-cover/8fui.mp4",
"DestinationSettings": {
"S3Settings": {
"AccessControl": {
"CannedAcl": "PUBLIC_READ"
}
}
}
}
}
}
],
"Inputs": [
{
"FileInput": "s3://t44-post-cover/8fui",
"VideoSelector": {
"ColorSpace": "FOLLOW"
},
"FilterEnable": "AUTO",
"TimecodeSource": "ZEROBASED",
"InputClippings": [
{
"StartTimecode": "00:00:00:00",
"EndTimecode": "00:00:02:00"
}
],
"FilterGraph": "fade=in:0:30",
"AudioSelectors": {
"Default": {
"DefaultSelection": "DEFAULT"
}
}
}
]
},
"AccelerationSettings": {
"Mode": "DISABLED"
},
"StatusUpdateInterval": "SECONDS_60",
"Priority": 0
}
}

Answer 1

AWS MediaConvert requires you to have at least one Audio Selector.
Just provide it with this simple one:
"Inputs": [
...
{
"AudioSelectors": {
"Audio Selector 1": {
"Offset": 0,
"DefaultSelection": "DEFAULT",
"SelectorType": "LANGUAGE_CODE",
"ProgramSelection": 1,
"LanguageCode": "ENM"
}
},
...
},
UPDATE:
A more barebones one:
"Inputs": [
...
{
"AudioSelectors": {
"Audio Selector 1": {
DefaultSelection: 'DEFAULT',
},
}
},
...
},