To download the Metrics from a Container you can use WGET

The Avlytics device exposes metrics on ports 9111 for Channel 1 and 9112 for channel 2 etc...

To read the metrics without Grafana and Prometheus, you can read them directly by downloading the metrics as an html webpage with WGET. 

pi@raspberry$ wget http://127.0.0.1:9111/metrics     

This will download a file called metrics to your Home/pi/ directory.

to inspect the metrics, use the following Command.

pi@raspberry$  more metrics

you should get an output similar to this ..

# HELP python_gc_objects_collected_total Objects collected during gc

# TYPE python_gc_objects_collected_total counter

python_gc_objects_collected_total{generation="0"} 1836.0

python_gc_objects_collected_total{generation="1"} 58.0

python_gc_objects_collected_total{generation="2"} 43.0

# HELP python_gc_objects_uncollectable_total Uncollectable object found during GC

# TYPE python_gc_objects_uncollectable_total counter

python_gc_objects_uncollectable_total{generation="0"} 0.0

python_gc_objects_uncollectable_total{generation="1"} 0.0

python_gc_objects_uncollectable_total{generation="2"} 0.0

# HELP python_gc_collections_total Number of times this generation was collected

# TYPE python_gc_collections_total counter

python_gc_collections_total{generation="0"} 428.0

python_gc_collections_total{generation="1"} 38.0

python_gc_collections_total{generation="2"} 3.0

# HELP python_info Python platform information

# TYPE python_info gauge

python_info{implementation="CPython",major="3",minor="7",patchlevel="3",version="3.7.3"} 1.0

# HELP process_virtual_memory_bytes Virtual memory size in bytes.

# TYPE process_virtual_memory_bytes gauge

process_virtual_memory_bytes 3.69201152e+08

# HELP process_resident_memory_bytes Resident memory size in bytes.

# TYPE process_resident_memory_bytes gauge

process_resident_memory_bytes 8.6642688e+07

# HELP process_start_time_seconds Start time of the process since unix epoch in seconds.

# TYPE process_start_time_seconds gauge

process_start_time_seconds 1.63118366641e+09

# HELP process_cpu_seconds_total Total user and system CPU time spent in seconds.

# TYPE process_cpu_seconds_total counter

process_cpu_seconds_total 0.04

# HELP process_open_fds Number of open file descriptors.

# TYPE process_open_fds gauge

process_open_fds 31.0

# HELP process_max_fds Maximum number of open file descriptors.

# TYPE process_max_fds gauge

Go through the metrics and look for monitor_fps{}

that will show the FPS for the channel in question.

monitor_fps{device="intertrade_INTERSEC_intertrade601",name="channel1",service="video",site="SF05",url="10.0.105.1:554/streaming/channels/102",version="7.22.10"} 0.0   <-    This is the Value for Channel1 Fps 

If you are getting 0 Fps , try to download a snapshot from the Device with WGET.

If the DVR is Hikvision you can use Wget to download

pi@raspberry$   wget --user admin --password huis1234 http://10.0.0.105/ISAPI/Streaming/channels/101/picture

You should get Success 200 OK and it should download a file called   'picture'

If it is Unsuccessful you will get something similar to this

pi@i601:~ $ wget --user admin --password MDS3cur3 http://10.0.105.1/ISAPI/Streaming/channels/101/picture

--2021-09-09 13:08:38--  http://10.0.105.1/ISAPI/Streaming/channels/101/picture

Connecting to 10.0.105.1:80... connected.

HTTP request sent, awaiting response... 401 Unauthorized

Authentication selected: Digest realm="b63fe603e5d8a7e853bbdd7e", domain="::", qop="auth", nonce="c7318f43a80827e041595f6d3e255bef:1631192916619", opaque="", algorithm="MD5", stale="FALSE"

Reusing existing connection to 10.0.105.1:80.

HTTP request sent, awaiting response... 401 Unauthorized

Username/Password Authentication Failed.

At this point you can confirm that the Username and Password are incorrect and that is why you are getting Zero FPS . 

Please reboot the dvr and ensure that the Username and Password are correct in the Hub for each channel.