`mpv av://v4l2:/dev/video0`: `ERROR: Unable to handle request: Unsupported url scheme: "av" (urllib)`

[alopatindev]

Debug log

Log

``` $ mpv --msg-level=mpv_thumbnail_script_server=debug,mpv_thumbnail_script_client_osc=debug,ytdl_hook=debug av://v4l2:/dev/video0 Warning: option --status-msg was replaced with --term-status-msg and might be removed in the future. Warning: option --display-fps was replaced with --override-display-fps and might be removed in the future. [ytdl_hook] Loading lua script @ytdl_hook.lua... [ytdl_hook] loading mp.defaults [mpv_thumbnail_script_server] Loading lua script /home/al/.config/mpv/scripts/mpv_thumbnail_script_server.lua... [mpv_thumbnail_script_client_osc] Loading lua script /home/al/.config/mpv/scripts/mpv_thumbnail_script_client_osc.lua... [mpv_thumbnail_script_server] loading mp.defaults [mpv_thumbnail_script_client_osc] loading mp.defaults [ytdl_hook] loading @ytdl_hook.lua [mpv_thumbnail_script_server] loading file /home/al/.config/mpv/scripts/mpv_thumbnail_script_server.lua [mpv_thumbnail_script_client_osc] loading file /home/al/.config/mpv/scripts/mpv_thumbnail_script_client_osc.lua [ytdl_hook] reading options for ytdl_hook [ytdl_hook] Opened config file script-opts/ytdl_hook.conf. [mpv_thumbnail_script_server] reading options for mpv_thumbnail_script [mpv_thumbnail_script_server] Opened config file script-opts/mpv_thumbnail_script.conf. [mpv_thumbnail_script_client_osc] reading options for mpv_thumbnail_script [mpv_thumbnail_script_client_osc] Opened config file script-opts/mpv_thumbnail_script.conf. [mpv_thumbnail_script_client_osc] reading options for osc [mpv_thumbnail_script_client_osc] script-opts/osc.conf not found. [mpv_thumbnail_script_client_osc] lua-settings/osc.conf not found. [ytdl_hook] full hook [mpv_thumbnail_script_client_osc] osc_init [mpv_thumbnail_script_server] Announcing self to master... [mpv_thumbnail_script_client_osc] Registered worker mpv_thumbnail_script_server [mpv_thumbnail_script_server] Successfully registered with master Not seekable, but enabling seeking on user request. (+) Video --vid=1 (rawvideo 640x480 30.000fps) [mpv_thumbnail_script_client_osc] osc_init [autoconvert] Converting yuyv422 -> yuv422p [autoconvert] Converting yuyv422 -> yuv422p VO: [gpu] 640x480 yuv422p Time: 00:00:00 / 00:00:00 0% [mpv_thumbnail_script_client_osc] Gathering video/thumbnail state [mpv_thumbnail_script_client_osc] thumb size550 412 [mpv_thumbnail_script_client_osc] Thumbnailer.state: {"worker_extra" = {}, "ready" = true, "available" = false, "is_remote" = 3, "thumbnail_directory" = "/var/tmp/al_mpv_thumbnails/ddd1a66bb45e60621e98da1d15b67df7369985fd-0", "thumbnail_template" = "/var/tmp/al_mpv_thumbnails/ddd1a66bb45e60621e98da1d15b67df7369985fd-0/%06d.bgra", "thumbnail_size" = {"h" = 412, "w" = 550}, "finished_thumbnails" = 0, "thumbnails" = {}, "thumbnail_count" = 0} [mpv_thumbnail_script_client_osc] Trying to get storyboard info... [mpv_thumbnail_script_client_osc] osc_init Time: 00:00:00 / 00:00:00 53% [mpv_thumbnail_script_client_osc] [debug] Command-line config: ['--format', 'sb0', '--dump-json', '--no-playlist', '--extractor-args', 'youtube:skip=hls,dash,translated_subs', '--', 'av://v4l2:/dev/video0'] [mpv_thumbnail_script_client_osc] [debug] System config "/etc/yt-dlp.conf": ['-vU', '-vvv', '--format-sort', 'res,codec:codec:h264,codec:av1,codec:vp9', '--format-sort-force', '--sub-format', 'ass/srt/best', '--concurrent-fragments', '32', '--no-write-comments', '--no-post-overwrites', '--user-agent=Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36'] [mpv_thumbnail_script_client_osc] [debug] Encodings: locale UTF-8, fs utf-8, pref UTF-8, out utf-8 (No ANSI), error utf-8 (No ANSI), screen utf-8 (No ANSI) [mpv_thumbnail_script_client_osc] [debug] yt-dlp version local@2023.11.25.1 [a0b19d319] Time: 00:00:00 / 00:00:00 56% [mpv_thumbnail_script_client_osc] [debug] Python 3.11.6 (CPython x86_64 64bit) - Linux-6.6.1-x86_64-11th_Gen_Intel-R-_Core-TM-_i9-11950H_@_2.60GHz-with-glibc2.37 (OpenSSL 3.0.11 19 Sep 2023, glibc 2.37) Time: 00:00:00 / 00:00:00 59% [mpv_thumbnail_script_client_osc] [debug] exe versions: ffmpeg 4.4.4 (fdk,setts), ffprobe 4.4.4, phantomjs broken, rtmpdump 2.4 [mpv_thumbnail_script_client_osc] [debug] Optional libraries: brotlicffi-1.1.0.0, certifi-2022.12.07, pycrypto-3.19.0, requests-2.31.0, secretstorage-3.3.3, sqlite3-3.43.2, urllib3-1.26.16 [mpv_thumbnail_script_client_osc] [debug] Proxy map: {} [mpv_thumbnail_script_client_osc] [debug] Request Handlers: urllib Time: 00:00:00 / 00:00:00 61% [mpv_thumbnail_script_client_osc] [debug] Loaded 1915 extractors [mpv_thumbnail_script_client_osc] [debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest Time: 00:00:00 / 00:00:00 74% [mpv_thumbnail_script_client_osc] Latest version: stable@2023.11.16 from yt-dlp/yt-dlp [mpv_thumbnail_script_client_osc] yt-dlp is up to date (local@2023.11.25.1) Time: 00:00:00 / 00:00:01 83% [mpv_thumbnail_script_client_osc] [generic] Extracting URL: av://v4l2:/dev/video0 [mpv_thumbnail_script_client_osc] [generic] video0: Downloading webpage [mpv_thumbnail_script_client_osc] ERROR: Unable to handle request: Unsupported url scheme: "av" (urllib) [mpv_thumbnail_script_client_osc] Traceback (most recent call last): [mpv_thumbnail_script_client_osc] File "/usr/lib/python3.11/site-packages/yt_dlp/YoutubeDL.py", line 1570, in wrapper [mpv_thumbnail_script_client_osc] return func(self, *args, **kwargs) [mpv_thumbnail_script_client_osc] ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [mpv_thumbnail_script_client_osc] File "/usr/lib/python3.11/site-packages/yt_dlp/YoutubeDL.py", line 1705, in __extract_info [mpv_thumbnail_script_client_osc] ie_result = ie.extract(url) [mpv_thumbnail_script_client_osc] ^^^^^^^^^^^^^^^ [mpv_thumbnail_script_client_osc] File "/usr/lib/python3.11/site-packages/yt_dlp/extractor/common.py", line 715, in extract [mpv_thumbnail_script_client_osc] ie_result = self._real_extract(url) [mpv_thumbnail_script_client_osc] ^^^^^^^^^^^^^^^^^^^^^^^ [mpv_thumbnail_script_client_osc] File "/usr/lib/python3.11/site-packages/yt_dlp/extractor/generic.py", line 2439, in _real_extract [mpv_thumbnail_script_client_osc] full_response = self._request_webpage(url, video_id, headers=filter_dict({ [mpv_thumbnail_script_client_osc] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [mpv_thumbnail_script_client_osc] File "/usr/lib/python3.11/site-packages/yt_dlp/extractor/common.py", line 847, in _request_webpage [mpv_thumbnail_script_client_osc] return self._downloader.urlopen(self._create_request(url_or_request, data, headers, query)) [mpv_thumbnail_script_client_osc] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [mpv_thumbnail_script_client_osc] File "/usr/lib/python3.11/site-packages/yt_dlp/YoutubeDL.py", line 4055, in urlopen [mpv_thumbnail_script_client_osc] return self._request_director.send(req) [mpv_thumbnail_script_client_osc] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [mpv_thumbnail_script_client_osc] File "/usr/lib/python3.11/site-packages/yt_dlp/networking/common.py", line 127, in send [mpv_thumbnail_script_client_osc] raise NoSupportingHandlers(unsupported_errors, unexpected_errors) [mpv_thumbnail_script_client_osc] yt_dlp.networking.exceptions.NoSupportingHandlers: Unable to handle request: Unsupported url scheme: "av" (urllib) [mpv_thumbnail_script_client_osc] Time: 00:00:01 / 00:00:01 81% Saving state. Not seekable, or time unknown - not saving position. [ffmpeg/demuxer] video4linux2,v4l2: Some buffers are still owned by the caller on close. [ffmpeg] ioctl(VIDIOC_QBUF): Bad file descriptor [ffmpeg] ioctl(VIDIOC_QBUF): Bad file descriptor Exiting... (Quit) [ytdl_hook] Exiting... [mpv_thumbnail_script_server] Exiting... [mpv_thumbnail_script_client_osc] Exiting... ```

Environment

• OS: Gentoo GNU/Linux
• mpv version: 0.36
• mpv_thumbnail_script version: 0.5.3

[po5]

How do you expect thumbnailing to ever work on an unseekable stream?

[alopatindev]

I don't. I expect that thumbling attempts will not happen for unseekable streams and this error won't appear.

Also I believe this error relates to micro freeze in this case, which doesn't happen with --no-config. Ok, this one was not related.