[mythtv-users] web app gets 404 on backend built with cmake on Archlinux

Tue Feb 18 19:10:07 UTC 2025

On Tue, Feb 18, 2025 at 9:52 AM James Abernathy <jfabernathy at gmail.com>
wrote:

>
>
> On Sun, Feb 16, 2025 at 1:32 PM James Abernathy <jfabernathy at gmail.com>
> wrote:
>
>>
>>
>> On Sun, Feb 16, 2025 at 10:38 AM Roland Ernst <rcrernst at gmail.com> wrote:
>>
>>>
>>>
>>> On Sun, Feb 16, 2025 at 3:40 PM James Abernathy <jfabernathy at gmail.com>
>>> wrote:
>>>
>>>>
>>>>
>>>> On Sun, Feb 16, 2025 at 8:57 AM Peter Bennett <pb.mythtv at gmail.com>
>>>> wrote:
>>>>
>>>>>
>>>>> On 2/15/25 21:20, James Abernathy wrote:
>>>>>
>>>>>
>>>>>
>>>>> On Sat, Feb 15, 2025 at 8:33 PM Peter Bennett <pb.mythtv at gmail.com>
>>>>> wrote:
>>>>>
>>>>>>
>>>>>> On 2/15/25 18:12, James Abernathy wrote:
>>>>>>
>>>>>> After a successful build of mythv using cmake on Archlinux, I copied
>>>>>> all the files from the "CMAKE_INSTALL_PREFIX=mythtv-qt5-build" location to
>>>>>> /usr/local/ and then did 'sudo ldconfig'
>>>>>>
>>>>>> I set up the mythtv-backend.service so it's would find mythbackend in
>>>>>> /usr/local/bin/
>>>>>>
>>>>>> When I reboot, it shows mythtv-backend running but when I send
>>>>>> firefox to localhost:6544, I see this in the log and a 404 error in the
>>>>>> browser.
>>>>>>
>>>>>> This had worked a few days ago on Debian. Maybe I'm missing something?
>>>>>>
>>>>>> Feb 15 18:03:27 nucboxg3 mythbackend[1972]: mythbackend[1972]: W
>>>>>> HTTP0 mythhttpfile.cpp:50 (ProcessFile) HTTPFile: Failed to find
>>>>>> '/home/jim/mythtv-qt5-build/share/mythtv/html/apps/backend/index.html'
>>>>>>
>>>>>> Jim A
>>>>>>
>>>>>>
>>>>>> The value of -DMYTH_RUN_PREFIX= determines where it should run from.
>>>>>> I suspect that you had -DMYTH_RUN_PREFIX set as some incorrect value.
>>>>>>
>>>>>> Also at run time you can use MYTHTVDIR=/usr/local to override an
>>>>>> incorrect MYTH_RUN_PREFIX used when building.
>>>>>>
>>>>>> Peter
>>>>>>
>>>>>
>>>>> There must be something else as well. See output below:
>>>>>
>>>>>  [jim at nucboxg3 ~]$ echo $MYTHTVDIR
>>>>> /usr/local
>>>>>
>>>>> [jim at nucboxg3 ~]$ sudo systemctl status mythtv-backend
>>>>> ● mythtv-backend.service - MythTV Backend
>>>>>      Loaded: loaded (/etc/systemd/system/mythtv-backend.service;
>>>>> enabled; preset: disabled)
>>>>>      Active: active (running) since Sat 2025-02-15 21:11:32 EST; 3min
>>>>> 37s ago
>>>>>  Invocation: d890ede46af54a038a61a21fd2bc7d69
>>>>>        Docs: https://www.mythtv.org/wiki/Mythbackend
>>>>>    Main PID: 699 (mythbackend)
>>>>>       Tasks: 9 (limit: 18663)
>>>>>      Memory: 169.7M (peak: 172.3M)
>>>>>         CPU: 573ms
>>>>>      CGroup: /system.slice/mythtv-backend.service
>>>>>              └─699 /usr/local/bin/mythbackend --quiet --syslog local7
>>>>>
>>>>> Feb 15 21:11:34 nucboxg3 mythbackend[699]: mythbackend[699]: I
>>>>> HTTPServer serverpool.cpp:421 (listen) Listening on TCP 0.0.0.0:6544
>>>>> Feb 15 21:11:34 nucboxg3 mythbackend[699]: mythbackend[699]: I
>>>>> HTTPServer serverpool.cpp:421 (listen) Listening on TCP [::]:6544
>>>>> Feb 15 21:11:34 nucboxg3 mythbackend[699]: mythbackend[699]: I
>>>>> HTTPServer serverpool.cpp:421 (listen) Listening on TCP 0.0.0.0:6744
>>>>> Feb 15 21:11:34 nucboxg3 mythbackend[699]: mythbackend[699]: I
>>>>> HTTPServer serverpool.cpp:421 (listen) Listening on TCP [::]:6744
>>>>> Feb 15 21:11:35 nucboxg3 mythbackend[699]: mythbackend[699]: I
>>>>> HTTPServer bonjourregister.cpp:116 (BonjourCallback) Bonjour: Service
>>>>> registration complete: name 'mythbackend on nucboxg3' type '_http._tcp.'
>>>>> domain: 'loca>
>>>>> Feb 15 21:12:28 nucboxg3 mythbackend[699]: mythbackend[699]: I HTTP0
>>>>> mythhttpmetaservice.cpp:126 (MythHTTPMetaService) Service
>>>>> '/services/' introspection complete
>>>>> Feb 15 21:12:28 nucboxg3 mythbackend[699]: mythbackend[699]: W HTTP0
>>>>> mythhttpfile.cpp:50 (ProcessFile) HTTPFile: Failed to find
>>>>> '/home/jim/mythtv-qt5-output/share/mythtv/html/apps/backend/index.html'
>>>>> Feb 15 21:12:28 nucboxg3 mythbackend[699]: mythbackend[699]: W HTTP0
>>>>> mythhttpfile.cpp:50 (ProcessFile) HTTPFile: Failed to find
>>>>> '/home/jim/mythtv-qt5-output/share/mythtv/html/apps/backend/index.html'
>>>>> Feb 15 21:12:28 nucboxg3 mythbackend[699]: mythbackend[699]: W HTTP0
>>>>> mythhttpfile.cpp:50 (ProcessFile) HTTPFile: Failed to find
>>>>> '/home/jim/mythtv-qt5-output/share/mythtv/html/favicon.ico'
>>>>> Feb 15 21:12:28 nucboxg3 mythbackend[699]: mythbackend[699]: W HTTP0
>>>>> mythhttpfile.cpp:50 (ProcessFile) HTTPFile: Failed to find
>>>>> '/home/jim/mythtv-qt5-output/share/mythtv/html/apps/backend/index.html'
>>>>> lines 1-22/22 (END)
>>>>>
>>>>> Even though it's looking the a different place, the files are there:
>>>>>
>>>>> cd mythtv-qt5-output/share/mythtv/html/apps/backend/
>>>>> [jim at nucboxg3 backend]$ ls
>>>>> 3rdpartylicenses.txt  color.png  favicon.ico  hue.png  index.html
>>>>>  main.js  polyfills.js  runtime.js  styles.css
>>>>> [jim at nucboxg3 backend]$
>>>>>
>>>>> Jim A
>>>>>
>>>>> Did you export MYTHTVDIR=/usr/local in the systemd service?
>>>>>
>>>>> Better to build with the correct MYTH_RUN_PREFIX so that you don't
>>>>> need to specify MYTHTVDIR in the systemd service. I only use MYTHTVDIR for
>>>>> testing and debugging or when running mythbackend from the command line.
>>>>>
>>>>> Peter
>>>>>
>>>> I'm not completely sure I understand the MYTH_RUN_PREFIX.  If I'm
>>>> building with -DCMAKE_INSTALL_PREFIX=~/my_mythtv_cmake_output but I intend
>>>> to copy the content of the my_mythtv_cmake_output directory to /usr then I
>>>> need to add -DMYTH_RUN_PREFIX=/usr??
>>>>
>>>> Jim A
>>>>
>>>>
>>>
>>> Yes, in this case you need both prefixes.
>>>
>>> Roland
>>>
>>>
>>
>> Okay, I'll test building with both prefixes on my next test.  For now I
>> was successful with using sudo and -DCMAKE_INSTALL_PREFIX=/usr
>>
>> Jim A
>>
>
> So I just tested on a fresh install of Archlinux Plasma via archinstall.
> The dependencies were installed with the recently fixed ansible role for
> Archlinux.
>
> I cloned mythtv and checked out fixes/35 and ran:
>
> cmake --preset qt5 -DCMAKE_INSTALL_PREFIX=~/mythtv-output
> -DMYTH_RUN_PREFIX=/usr
> cmake --build build-qt5
>
> Then I copied all the files from ~/mythtv-output to /usr.
>
> I ran my script that setups the mythtv user, mythtv-backend.service,
> mythconverg database, and Storage Group directories with permissions.
>
> After reboot the web app worked and found the database okay.
>
> Only one issue, when trying to work the Input Connections page I could not
> use the scan option of HDHomerun Channel Import.  It got stuck on LOCK on
> the first channel.
>
> I switched to Full Scan and got past that.  This has not been an issue on
> Debian or Ubuntu systems.
>
> hdhomerun_config discover
> hdhomerun device 1043ECAB found at fe80::218:ddff:fe04:3eca%3
> hdhomerun device 1043ECAB found at 192.168.68.93
> hdhomerun device 1074C841 found at fe80::218:ddff:fe07:4c84%3
> hdhomerun device 1074C841 found at 192.168.68.92
>
> Jim A
>

I found some more information.  Originally I had both of my HDHomerun
tuners selected. So there should have been a total of 4+2= 6 channels
available. I only wanted 2 capture card entries and the system could pick
from either tuner device.  That must have confused Mythtv. It's worked in
the past on non-Arch systems.  So I edited to only select the HDHR Connect
for both capture card entries. So both tuner inputs from the same device.
This time HDHomerun Channel Import worked.

Jim A
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