Works only in Debugger Mode?

[fazeez007]

Hi, Im using the YouTube-dl library for ios. However the download of the m3u8 is only happening in the debugger mode in xcode.
Any sugestions why we are not able to run without debugger.

Below is the only log i was able to fetch while not running in debugger mode:

["[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)", "[debug] yt-dlp version stable@2023.12.30 from yt-dlp/yt-dlp [f10589e34] (zip) API", "[debug] params: {\'usenetrc\': False, \'netrc_location\': None, \'netrc_cmd\': None, \'username\': None, \'password\': None, \'twofactor\': None, \'videopassword\': None, \'ap_mso\': None, \'ap_username\': None, \'ap_password\': None, \'client_certificate\': None, \'client_certificate_key\': None, \'client_certificate_password\': None, \'quiet\': False, \'no_warnings\': False, \'forceurl\': False, \'forcetitle\': False, \'forceid\': False, \'forcethumbnail\': False, \'forcedescription\': False, \'forceduration\': False, \'forcefilename\': False, \'forceformat\': False, \'forceprint\': {}, \'print_to_file\': {}, \'forcejson\': False, \'dump_single_json\': False, \'force_write_download_archive\': False, \'simulate\': None, \'skip_download\': False, \'format\': None, \'allow_unplayable_formats\': False, \'ignore_no_formats_error\': False, \'format_sort\': [\'vcodec:h264\', \'res\', \'acodec:m4a\'], \'format_sort_force\': False, \'allow_multiple_video_streams\': False, \'allow_multiple_audio_streams\': False, \'check_formats\': None, \'listformats\': None, \'listformats_table\': True, \'outtmpl\': {\'default\': \'%(id)s.%(ext)s\'}, \'outtmpl_na_placeholder\': \'NA\', \'paths\': {}, \'autonumber_size\': None, \'autonumber_start\': 1, \'restrictfilenames\': False, \'windowsfilenames\': False, \'ignoreerrors\': True, \'force_generic_extractor\': False, \'allowed_extractors\': [\'default\'], \'ratelimit\': None, \'throttledratelimit\': None, \'overwrites\': None, \'retries\': 10, \'file_access_retries\': 3, \'fragment_retries\': 10, \'extractor_retries\': 3, \'retry_sleep_functions\': {}, \'skip_unavailable_fragments\': True, \'keep_fragments\': False, \'concurrent_fragment_downloads\': 1, \'buffersize\': 1024, \'noresizebuffer\': False, \'http_chunk_size\': None, \'continuedl\': True, \'noprogress\': False, \'progress_with_newline\': False, \'progress_template\': {}, \'playliststart\': 1, \'playlistend\': None, \'playlistreverse\': None, \'playlistrandom\': None, \'lazy_playlist\': None, \'noplaylist\': False, \'logtostderr\': False, \'consoletitle\': False, \'nopart\': False, \'updatetime\': True, \'writedescription\': False, \'writeannotations\': False, \'writeinfojson\': None, \'allow_playlist_files\': True, \'clean_infojson\': True, \'getcomments\': False, \'writethumbnail\': False, \'write_all_thumbnails\': False, \'writelink\': False, \'writeurllink\': False, \'writewebloclink\': False, \'writedesktoplink\': False, \'writesubtitles\': False, \'writeautomaticsub\': False, \'allsubtitles\': False, \'listsubtitles\': False, \'subtitlesformat\': \'best\', \'subtitleslangs\': [], \'matchtitle\': None, \'rejecttitle\': None, \'max_downloads\': None, \'prefer_free_formats\': False, \'trim_file_name\': 0, \'verbose\': True, \'dump_intermediate_pages\': False, \'write_pages\': False, \'load_pages\': False, \'test\': False, \'keepvideo\': False, \'min_filesize\': None, \'max_filesize\': None, \'min_views\': None, \'max_views\': None, \'daterange\': yt_dlp.utils.DateRange(\'0001-01-01\', \'9999-12-31\'), \'cachedir\': None, \'youtube_print_sig_code\': False, \'age_limit\': None, \'download_archive\': None, \'break_on_existing\': False, \'break_on_reject\': False, \'break_per_url\': False, \'skip_playlist_after_errors\': None, \'cookiefile\': None, \'cookiesfrombrowser\': None, \'legacyserverconnect\': False, \'nocheckcertificate\': True, \'prefer_insecure\': None, \'enable_file_urls\': False, \'http_headers\': {\'User-Agent\': \'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36\', \'Accept\': \'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\', \'Accept-Language\': \'en-us,en;q=0.5\', \'Sec-Fetch-Mode\': \'navigate\'}, \'proxy\': None, \'socket_timeout\': None, \'bidi_workaround\': None, \'debug_printtraffic\': False, \'prefer_ffmpeg\': True, \'include_ads\': None, \'default_search\': None, \'dynamic_mpd\': True, \'extractor_args\': {}, \'youtube_include_dash_manifest\': True, \'youtube_include_hls_manifest\': True, \'encoding\': None, \'extract_flat\': \'discard_in_playlist\', \'live_from_start\': None, \'wait_for_video\': None, \'mark_watched\': False, \'merge_output_format\': \'mp4\', \'final_ext\': None, \'postprocessors\': [{\'key\': \'FFmpegConcat\', \'only_multi_video\': True, \'when\': \'playlist\'}], \'fixup\': None, \'source_address\': None, \'call_home\': False, \'sleep_interval_requests\': None, \'sleep_interval\': None, \'max_sleep_interval\': None, \'sleep_interval_subtitles\': 0, \'external_downloader\': {}, \'download_ranges\': yt_dlp.utils.download_range_func([], []), \'force_keyframes_at_cuts\': False, \'list_thumbnails\': False, \'playlist_items\': None, \'xattr_set_filesize\': None, \'match_filter\': None, \'color\': {}, \'ffmpeg_location\': None, \'hls_prefer_native\': None, \'hls_use_mpegts\': None, \'hls_split_discontinuity\': False, \'external_downloader_args\': {}, \'postprocessor_args\': {}, \'cn_verification_proxy\': None, \'geo_verification_proxy\': None, \'geo_bypass\': True, \'geo_bypass_country\': None, \'geo_bypass_ip_block\': None, \'_warnings\': [], \'_deprecation_warnings\': [], \'compat_opts\': set(), \'logger\': <MyLogger object at 0x1390438e0>, \'progress_hooks\': [<built-in method pythonkit_swift_function of PyCapsule object at 0x139042a60>]}", "[debug] Python 3.10.10 (CPython iPhone16,1 64bit) - macOS-17.5.1-iPhone16,1-64bit (OpenSSL 1.1.1l 24 Aug 2021)"]

So what I noticed is that the log after the above in debugger mode continue like below

Popen.__init__: <yt_dlp.utils.Popen object at 0x125e2feb0> (['ffmpeg', '-bsfs'],)
Popen.communicate: <yt_dlp.utils.Popen object at 0x125e2feb0> () {'timeout': None}
popenHandler [<yt_dlp.utils.Popen object at 0x125e2feb0>, (['ffmpeg', '-bsfs'],)]

[nasircsms]

facing same issue.. as soon as debugger is detached it stops working.

[fazeez007]

@nasircsms Any progress on the issue?

[nasircsms]

@nasircsms Any progress on the issue?

Nope.. no progress so far.

[nasircsms]

@fazeez007 did you manage to resolve it ?

@kewlbear any guidance on it ??

[willsmillie]

+1

I'm also encountering this. I'll also poke around if there's some recommendations on where to look. It's hard to debug when you can't use the debugger 🥴. I tried using os_log but it won't let me log variables without making the log private.

Seems like it's something to do with calling ffmpeg via python. I know what's pretty vague tho....

[willsmillie]

I managed to mitigate the issue by disabling stdout/err redirection in the popenHandler.

I'm not totally certain of what/if implications this may have, so hoping @kewlbear can maybe shed some light here.