[mythtv-users] V32 issued with mythexternrecorder and youtube-dl

[OpenMedia Support]

>
> On 3/27/22 02:37, OpenMedia Support wrote:
>> Just upgraded from Ubuntu 18.04 -> 20.04 and MythTV V31 -> V32
>>
>> I had a nicely working external recorder working with our local FTA
>> channels, and even documented the process for others to use under
>>
>>   -https://github.com/steven-ellis/mypvr-nz-iptv
>>
>> I'm using
>>   -
>> https://github.com/steven-ellis/mypvr-nz-iptv/blob/main/external/youtube-dl-nz.conf
>>   -
>> https://github.com/steven-ellis/mypvr-nz-iptv/blob/main/external/youtube-dl-nz-channels.conf
>>
>> With the upgrade to V32 the youtube-dl command just exits almost
>> immediately and I can't debug any reasonable reason why.
>>
>>
>> If I run youtube-dl on the command line and pipe the output to mpv
>> playback works
>>
>> mythfe at mythtv:/tmp$ /usr/bin/youtube-dl -q -o - --hls-use-mpegts
>> --external-downloader-args "-hide_banner -nostats -loglevel panic -re"
>> "https://i.mjh.nz/nz/tv.9.m3u8"  | mpv - --vo=x11
>> [file] Reading from stdin...
>> WARNING: Could not send HEAD request to
>> https://d2ce82tpc3p734.cloudfront.net/v1/master/b1f4432f8f95be9e629d97baabfed15b8cacd1f8/TVNZ_1/master.m3u8:
>> HTTP Error 404: Not Found
>>   (+) Video --vid=1 (h264 1280x720 25.000fps)
>>   (+) Audio --aid=1 (aac 2ch 48000Hz)
>> [vo/x11] Warning: this legacy VO has bad performance. Consider fixing
>> your
>> graphics drivers, or not forcing the x11 VO.
>> ALSA lib conf.c:5187:(snd_config_expand) Unknown parameters
>> CARD=Generic,DEV=0
>> ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM
>> hdmi:CARD=Generic,DEV=0
>> [ao/alsa] Playback open error: Invalid argument
>> [ao] Failed to initialize audio driver 'alsa'
>> [ao] This audio driver/device was forced with the --audio-device option.
>> [ao] Try unsetting it.
>> Could not open/initialize audio device -> no sound.
>> Audio: no audio
>> VO: [x11] 1280x720 yuv420p
>> [vo/x11] Shared memory not supported
>> [vo/x11] Reverting to normal Xlib
>> [vo/x11] Shared memory not supported
>> [vo/x11] Reverting to normal Xlib
>> V: 00:00:00 / 00:00:00 (2%) Cache: 0.6s/162KB
>> [vo/x11] Shared memory not supported
>> [vo/x11] Reverting to normal Xlib
>> [vo/x11] Shared memory not supported
>> [vo/x11] Reverting to normal Xlib
>> V: 00:00:02 / 00:00:02 (82%) Cache: 0.3s/99KB
>>
>>
>> Exiting... (Quit)
>> ERROR: ffmpeg exited with code 1
>>
>>
>> If I try to debug the external recorder I can see it tries to start
>> youtube-dl but it appears to exit immediately
>>
.....
>>
>> Any tips on additional debugging steps.
>
> I have scripts for an external recorder that are working fine.
> (https://github.com/bennettpeter/MythTV-LeanCapture).
>
> If youtube-dl is outputting an error message you may not see it, the
> error output may be getting lost. For my external recorder I use shell
> scripts for all of the commands. The error output is redirected to a file.
>
> I don't know if a redirect on the command line in the conf file will
> work. You could try that:
>
> command="/usr/bin/youtube-dl --hls-use-mpegts --external-downloader-args
> \"-hide_banner -nostats -loglevel panic -re\" -o - \"%URL%\"
> 2>>/tmp/youtube-dl.log"
>
> Alternatively create a shell script that calls the command with the
> redirect of stderr
>
> Also in the shell script you may want to log the return code from
> youtube-dl
>

Hi Peter

Thanks for the tips. I was thinking along the same lines

I created a wrapper to dump all the arguments out and then call the real
command and I get the following


RUNNING: /usr/bin/youtube-dl -q -o - --hls-use-mpegts
--external-downloader-args "-hide_banner -nostats -loglevel panic -re"
"https://i.mjh.nz/nz/tv.9.m3u8"
ERROR: '"https://i.mjh.nz/nz/tv.9.m3u8"' is not a valid URL. Set
--default-search "ytsearch" (or run  youtube-dl
"ytsearch:"https://i.mjh.nz/nz/tv.9.m3u8"" ) to search YouTube
/usr/bin/youtube-dl failed with 1

Yet if I run the following on the command line it works without issue. Odd.

/usr/bin/youtube-dl -q -o - --hls-use-mpegts --external-downloader-args
"-hide_banner -nostats -loglevel panic -re"
"https://i.mjh.nz/nz/tv.9.m3u8" | mpv - -vo=x11

Odd