Failed to start requested stream / Streaming Failed (transcoder exited)

[prog-amateur]

Hello, I'm new to LiveTV on computer but I learned a lot. I was able to install Next-PVR on a Debian server (Intel 64 bits CPU) with a Hauppauge Win-TV ministick as DVB-T device.

The scan is fine, the french channels are recognized, but the EPG guide is not recognized (in the popup, there is a timer for each channel frequency, but the final result shows 0).

Then, I click on "save", and when I click on a channel, the video doesn't start, there is an error message: very often "Failed to start requested stream" or "Streaming Failed (transcoder exited)".

I tested a w_scan command on my laptop (Debian too) with the same DVB-T stick, and VLC can read the channels from the .xspf file).

Please find attached my log files (fortunately, I have tried everything today, so the logs are not too long).

In another thread, a member has the same issue than me, but his solution looks like unclear (and I don't know how to change channels names, and by which name I should change them), and he did not feedback to explain what happen if he change back the channel name to the previous one.

Could you please help me? This is, I hope, the last step before I can finally see LiveTV on my computer.

Thanks a lot !!!!

[mvallevand]

I expect you installed as root which is not supported since NextPVR installs require a home folder. Change your default recording folder to one with the appropriate permissions https://forums.nextpvr.com/showthread.ph...#pid524823

There also seems to be a problem with you tuner to what do you see on the linux command prompt with

ls -Rlt /dev/dvb/

Martin

[prog-amateur]

Thank you very much for helping me so quickly.

Now you say that, I remember that during first install, there was an all success message except something like "error : no "_apt" permission to "/home/admin/" folder)".

I have followed the following commands without error (in another hand, there is no output message, therefore I think it was OK) :

Code:

sudo /opt/nextpvr/shell/nextpvr-recording.sh /videos/livetv
sudo /opt/nextpvr/shell/nextpvr-recording.sh /videos/recordings
sudo /opt/nextpvr/shell/nextpvr-recording.sh /movies

Then I have reboot my server, but I still have the error message "Failed to start requested stream".
I also have tried to use the following command :

Code:

ls -Rlt /dev/dvb/

But this time, it says that the folder does not exist (I can see there is no /dev/dvb folder).

I have updated the log file (just in case there is new code into it).
What do you think (maybe I did something wrong) ?

Again, thank you very much for your kind help.

[mvallevand]

You need to go to Settings->General page to make sure those are setup properly.

If /dev/dvb doesn't exist you will have problems with your tuner.

Maybe try sudo ls /dev/dvb

Also does

/opt/nextpvr/system/DeviceHost/x64/DeviceHostLinux -discover

show anything?

Martin

[prog-amateur]

Thank you ! I have checked in Settings > General and could see that the folders are setup on C:\Public\Users\... like Windows, so I have changed that way :
/videos/livetv/
/videos/recordings/


Also about the listing :

Code:

ls /dev/dvb

Tells that no such file or folder exist. In any case, please find a attached picture about my /dev/ directory :



And about the DVB-T device :

Code:

/opt/nextpvr/system/DeviceHost/x64/DeviceHostLinux -discover

Tells :

Code:

<devices>
</devices>

And when I click on Settings > Device status, it tells "No devices are currently active" (which is really strange since I can scan channels).
By the way, in Settings > Device, Next-PVR does not shows "Hauppauge Wint-TV ministick" but "adapter0/frontend0 (Siano Mobile Digital MDTV Receiver)" instead.

Also, I don't think it is related but we never know : to make my server recognize the DVB-T device, I had to move 3 drivers in "/lib/firmwares" :

Code:

sms1xxx-hcw-55xxx-dvbt-01.fw
sms1xxx-hcw-55xxx-dvbt-02.fw
sms1xxx-hcw-55xxx-dvbt-03.fw

Maybe I should keep only the last one ?

In any case, thank you very much again !

[mvallevand]

You'd probably need to look at your Debian log messages with dmesg or journctl to see what is going one. NextPVR found the device but it doesn't seem to be available now so you might need to power off the PC wait 10 seconds and restart to see if it comes back.

You can't really scan channels, it is failing each time, NextPVR is using your original discovery information that is not valid right now.

Martin

[prog-amateur]

Hello, thank you very much !
Seeing that the device was not mentionned in dmesg, I have unplugged, then plugged again the DVB-T device and now, it scans many channels, and also the guide (which is the very good news).

However, the device is still absent in Settings > Device, moreover only 1 channel works, and I cannot download any channel logo. I don't know what is the problem.

Do you think it is related to the DVB-T device itself ? If so, do you know a DVB-T device (not homerun like) that is natively compatible with Linux (debian) ? I feel really struggling with this Hauppauge ministick.

Thank you very much !

[sub]

However, the device is still absent in Settings > Device, moreover only 1 channel works, and I cannot download any channel logo. I don't know what is the problem.

If you hit the 'ReScan for devices' button, does it show up?

Do you think it is related to the DVB-T device itself ?

You've certainly got some issue with the device, since it was missing from /dev for a while there.

If so, do you know a DVB-T device (not homerun like) that is natively compatible with Linux (debian) ? I feel really struggling with this Hauppauge ministick.

Usually on Linux I endup using my Hauppauge WinTV dualHD stick. (I do have a ministick also, but I've never used that on Linux)

[mvallevand]

Typically if you have no devices on startup

2021-07-29 21:36:45.200 [DEBUG][1] Local Devices: <devices>
</devices>

unless you specifically told NextPVR not to scan devices NextPVR should mark the tuner as missing but that doesn't seem to be the case. In my experience NextPVR doesn't find them on sescan but that may have changed.

Code:

"id": "21",
"name": "adapter0/frontend0 (Siano Mobile Digital MDTV Receiver)",
"channelCount": 10,
"sourceType": "DVB-T",
"present": true,
"enabled": true
}
,{
"id": "22",
"name": "adapter0/frontend0 (Siano Mobile Digital MDTV Receiver)",
"channelCount": 0,
"sourceType": "DVB-C",
"present": true,
"enabled": true
}

Martin

[prog-amateur]

However, the device is still absent in Settings > Device, moreover only 1 channel works, and I cannot download any channel logo. I don't know what is the problem.

If you hit the 'ReScan for devices' button, does it show up?

-> No, clicking on ReScan does not show it up. Still something like "no device activated" message. Maybe I did something wrong with the firmware because I can't understand this dual case : can scan the channels, but cannot play most of them (26 among 27 channels) and it is not detected by Next-PVR. 

If so, do you know a DVB-T device (not homerun like) that is natively compatible with Linux (debian) ? I feel really struggling with this Hauppauge ministick.

Usually on Linux I endup using my Hauppauge WinTV dualHD stick. (I do have a ministick also, but I've never used that on Linux)

-> About your Hauppauge WinTV dualHD stick : did you have to install any firmware or was it plug and play ? By the way, which OS do you use ? Debian / Ubuntu / Mint / Arch, Desktop / Server ?

Typically if you have no devices on startup

2021-07-29 21:36:45.200 [DEBUG][1] Local Devices: <devices>
</devices>

unless you specifically told NextPVR not to scan devices NextPVR should mark the tuner as missing but that doesn't seem to be the case.  In my experience NextPVR doesn't find them on sescan but that may have changed.

Code:

"id": "21",
"name": "adapter0/frontend0 (Siano Mobile Digital MDTV Receiver)",
"channelCount": 10,
"sourceType": "DVB-T",
"present": true,
"enabled": true
}
,{
"id": "22",
"name": "adapter0/frontend0 (Siano Mobile Digital MDTV Receiver)",
"channelCount": 0,
"sourceType": "DVB-C",
"present": true,
"enabled": true
}

Martin

-> That's interesting because clicking on Re-scan devices display something like "no device activated" as I told above to sub. Do you think I forgot a linux command like modprobe or anything to activate the stick ? Maybe the firmware is OK but the stick is activated locally only, but not in Next-PVR ? Or maybe a permission issue ? 



In any case, both of you : huge thanks for your patience and kind help, I really appreciate !