OSError: [Errno 55] No buffer space available

[cisiwen]

not sure is anyone encounter this error
but when i try to
strm = threefive.Stream('udp://@224.2.2.4:1234')
i keep getting
OSError: [Errno 55] No buffer space available

ffplay playing good

Input #0, mpegts, from 'udp://@224.2.2.4:1234':KB sq= 0B f=0/0 Duration: N/A, start: 630.728000, bitrate: N/A Program 1 Metadata: service_name : Service01 service_provider: FFmpeg Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn Stream #0:1[0x101](und): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 98 kb/s Stream #0:2[0x258]: Data: scte_35

System: macos Big Sur
Python : Python 3.9.13 with Anaconda

thanks

[cisiwen]

More of error message
Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Users/*******/opt/anaconda3/envs/py36/lib/python3.9/site-packages/threefive/stream.py", line 139, in __init__ self._tsdata = reader(tsdata) File "/Users/*******/opt/anaconda3/envs/py36/lib/python3.9/site-packages/new_reader.py", line 72, in reader return _open_mcast(uri) File "/Users/xiaozhi/opt/anaconda3/envs/py36/lib/python3.9/site-packages/new_reader.py", line 142, in _open_mcast mcast_sock = _mk_mcast_sock(mcast_grp, mcast_port) File "/Users/*******/opt/anaconda3/envs/py36/lib/python3.9/site-packages/new_reader.py", line 116, in _mk_mcast_sock _udp_sock_opts(sock) File "/Users/*******/opt/anaconda3/envs/py36/lib/python3.9/site-packages/new_reader.py", line 91, in _udp_sock_opts sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 90000000) OSError: [Errno 55] No buffer space available

[richard-vd]

Try this:

import threefive

# start monkey patch
import new_reader
import socket

def _udp_sock_opts(sock):
    # sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 90000000)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 7456540)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    if hasattr(socket, "SO_REUSEPORT"):
        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)

new_reader._udp_sock_opts = _udp_sock_opts
# end monkey patch


strm = threefive.Stream('udp://@224.2.2.4:1234')

Does it work for you?

[cisiwen]

Hi richard

thanks very much it is working nicely
the output as expect

{
"info_section": {
"table_id": "0xfc",
"section_syntax_indicator": false,
"private": false,
"sap_type": "0x3",
"sap_details": "No Sap Type",
"section_length": 42,
"protocol_version": 0,
"encrypted_packet": false,
"encryption_algorithm": 0,
"pts_adjustment_ticks": 0,
"pts_adjustment": 0.0,
"cw_index": "0x0",
"tier": "0xfff",
"splice_command_length": 15,
"splice_command_type": 5,
"descriptor_loop_length": 10,
"crc": "0x81d26ba8"
},
"command": {
"command_length": 15,
"command_type": 5,
"name": "Splice Insert",
"break_auto_return": true,
"break_duration": 4.0,
"break_duration_ticks": 360000,
"splice_event_id": 18,
"splice_event_cancel_indicator": false,
"out_of_network_indicator": true,
"program_splice_flag": true,
"duration_flag": true,
"splice_immediate_flag": true,
"unique_program_id": 0,
"avail_num": 0,
"avail_expected": 0
},
"descriptors": [
{
"tag": 0,
"descriptor_length": 8,
"name": "Avail Descriptor",
"identifier": "CUEY",
"provider_avail_id": 18
}
],
"packet_data": {
"pid": "0x258",
"program": 1,
"pcr_ticks": 1226830219,
"pcr": 13631.446878,
}
}

[futzu]

@richard-vd,
I appreciate your enthusiasm, however, I need you to stop.
That is not a solution. You didn't solve the problem, you just worked around it.

[futzu]

@cisiwen
I set the buffer gigantic like that because some people were dropping packets.
If you drop packets, the receive buffer can be increased at the OS level with sysctl.

sysctl  net.inet.udp.recvspace

[cisiwen]

@futzu

thanks for the deep level of explanation! i suspected could be os level issue but can't get proper fix from google search
very lucky i get the answer and solution from both you and richard

Like threefive work like a charm and thanks both you and richard so quick and prefessinal solution.

[cisiwen]

belive the issue solved, you can close the ticket!

[futzu]

run
pip3 install --upgrade threefive
and it should work without having to patch it.