We make the initial RequestStream call with the following parameters…
{
StreamType: "Transcoded",
MethodType: "Pull",
SignalType: "Playback",
ItemId: cameraId,
DestWidth: width,
DestHeight: height,
Fps: "1",
ComprLevel: "70",
Time: dateTime
}
And we receive the following outputParams…
<OutputParams>
<Param Name="Live" Value="Yes" />
<Param Name="Playback" Value="Yes" />
<Param Name="PTZ" Value="Yes" />
<Param Name="Preset" Value="Yes" />
<Param Name="ExportAvi" Value="Yes" />
<Param Name="ExportDatabase" Value="Yes" />
<Param Name="ExportJpeg" Value="Yes" />
<Param Name="Sequences" Value="Yes" />
<Param Name="DbStartTime" Value="1613073014253" />
<Param Name="VideoId" Value="25cd6b5c-de93-4fa4-a9bc-6a3a186fa969" />
<Param Name="StreamId" Value="25cd6b5c-de93-4fa4-a9bc-6a3a186fa969" />
<Param Name="ByteOrder" Value="LittleEndian" />
<Param Name="StreamType" Value="Transcoded" />
<Param Name="SrcWidth" Value="1920" />
<Param Name="SrcHeight" Value="1080" />
</OutputParams>
We then make a POST request to… http://{Endpoint}/XProtectMobile/Video/{VideoId}
The response returns with valid data that we then decode and use to build out an image.
However, subsequent requests to the same endpoint result in failures when trying to parse the response body for video information. The first 2 properties decoded, the GUID and the timestamp, don’t get decoded correctly and nothing else seems to be correct. Here is the decoded VideoConnectionItem from the initial response that was working…
VideoConnectionItem {
Type: { Segment: 0, Frame: 1 },
Error: { NonFatal: 1, Fatal: 2 },
MainHeaderLength: 36,
SizeInfoHeaderLength: 32,
LiveInfoHeaderLength: 8,
PlaybackInfoHeaderLength: 8,
HeaderExtensionFlagSize: 1,
HeaderExtensionFlagLive: 2,
HeaderExtensionFlagPlayback: 4,
HeaderExtensionFlagNativeData: 8,
HeaderExtensionFlagMotionData: 16,
HeaderLocationData: 32,
HeaderStreamInfo: 64,
HeaderCarouselInfo: 128,
LiveFlags:
{ LiveFeed: 1,
Motion: 2,
Recording: 4,
Notification: 8,
CameraConnectionLost: 16,
DatabaseFail: 32,
DiskFull: 64,
ClientLiveStopped: 128 },
PlaybackFlags:
{ Stopped: 1,
Forward: 2,
Backward: 4,
DatabaseStart: 16,
DatabaseEnd: 32,
DatabaseError: 64 },
offset: 84,
data: Uint8Array [ ... ],
uuid: 'c0541af4-a407-4046-b3ca-741affa6706e',
timestamp: 2021-02-25T20:52:06.687Z,
frameNumber: 0,
dataSize: 262312,
headerSize: 84,
hasSizeInformation: 1,
hasLiveInformation: 0,
hasPlaybackInformation: 0,
hasNativeData: 0,
hasMotionInformation: 0,
hasLocationData: 0,
hasStreamInfo: 0,
hasCarouselInfo: 0,
sizeInfo:
{ sourceSize: { width: 1920, height: 1080 },
sourceCrop:
{ left: 0,
top: 0,
right: 1920,
bottom: 1080,
width: 1920,
height: 1080 },
destinationSize:
{ width: 1920,
height: 1080,
resampling: 1,
top: 0,
right: 1920,
bottom: 1080 } },
type: 1,
blob: Blob {
buffer: <Buffer ... >,
[Symbol(closed)]: false,
[Symbol(type)]: 'image/jpeg' }
}
We are just trying to get playback working through through the Mobile Protocol. Please let us know if we are missing something or if you need more information.
Thank you.