Plex is transcoding srt subtitles into ASS which triggers a whole video transcode

Plex Players Desktop Players
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1

Server Version#: 1.40.1.8227
Player Version#: 4.128.1

Apr 13, 2024 22:38:41.285 [139703057656632] DEBUG - [Req#50/Transcode] TranscodeUniversalRequest: adapting profile with augmentation data: append-transcode-target-codec(type=videoProfile&context=streaming&audioCodec=aac&protocol=dash)
Apr 13, 2024 22:38:41.285 [139703057656632] DEBUG - [Req#50/Transcode] TranscodeUniversalRequest: using augmented profile Firefox
Apr 13, 2024 22:38:41.285 [139703057656632] DEBUG - [Req#50/Transcode] Downloading document http://127.0.0.1:32400/library/metadata/3198?includeBandwidths=1&offset=-1&X-Plex-Incomplete-Segments=1&X-Plex-Session-Identifier=u0yl83oxtzsgnoowfq4kfarr
Apr 13, 2024 22:38:41.288 [139703057656632] DEBUG - [Req#50/Transcode] Audio Stream: 5591, Subtitle Stream: 5592
Apr 13, 2024 22:38:41.289 [139703057656632] DEBUG - [Req#50/Transcode] Codecs: testing h264_vaapi (encoder)
Apr 13, 2024 22:38:41.289 [139703057656632] DEBUG - [Req#50/Transcode] Codecs: hardware transcoding: testing API vaapi for device '/dev/dri/renderD128' (DG2 [Arc A380])
Apr 13, 2024 22:38:41.289 [139703057656632] ERROR - [Req#50/Transcode] [FFMPEG] - No VA display found for device /dev/dri/renderD128.
Apr 13, 2024 22:38:41.289 [139703057656632] DEBUG - [Req#50/Transcode] Codecs: hardware transcoding: opening hw device failed - probably not supported by this system, error: Invalid argument
Apr 13, 2024 22:38:41.289 [139703057656632] DEBUG - [Req#50/Transcode] Could not create hardware context for h264_vaapi
Apr 13, 2024 22:38:41.289 [139703057656632] DEBUG - [Req#50/Transcode] Codecs: testing hevc (decoder) with hwdevice vaapi
Apr 13, 2024 22:38:41.289 [139703057656632] DEBUG - [Req#50/Transcode] Codecs: hardware transcoding: testing API vaapi for device '/dev/dri/renderD128' (DG2 [Arc A380])
Apr 13, 2024 22:38:41.289 [139703057656632] ERROR - [Req#50/Transcode] [FFMPEG] - No VA display found for device /dev/dri/renderD128.
Apr 13, 2024 22:38:41.289 [139703057656632] DEBUG - [Req#50/Transcode] Codecs: hardware transcoding: opening hw device failed - probably not supported by this system, error: Invalid argument
Apr 13, 2024 22:38:41.289 [139703057656632] DEBUG - [Req#50/Transcode] Could not create hardware context for hevc
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Selected protocol dash; container: mp4
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: analyzing media item 3105
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Evangelion: 1.0 You Are (Not) Alone (2007): Direct Play is disabled
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Evangelion: 1.0 You Are (Not) Alone (2007): media must be transcoded in order to use the dash protocol
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Evangelion: 1.0 You Are (Not) Alone (2007): selected audio stream is not the first audio stream and direct play stream selection is not enabled
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Evangelion: 1.0 You Are (Not) Alone (2007): no direct play video profile exists for http/mkv/hevc
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Evangelion: 1.0 You Are (Not) Alone (2007): no direct play video profile exists for http/mkv/hevc/dca
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Evangelion: 1.0 You Are (Not) Alone (2007): no direct play video profile exists for http/mkv/hevc/flac
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Evangelion: 1.0 You Are (Not) Alone (2007): no direct play video profile exists for http/mkv/hevc/ac3
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Evangelion: 1.0 You Are (Not) Alone (2007): no direct play video profile exists for http/mkv/hevc/flac
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] Evangelion: 1.0 You Are (Not) Alone - video.bitDepth limitation applies: 10 > 8
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] Evangelion: 1.0 You Are (Not) Alone - audio.channels limitation applies: 7 > 2
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Evangelion: 1.0 You Are (Not) Alone (2007): Direct Streaming is disabled, so video stream will be transcoded
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Evangelion: 1.0 You Are (Not) Alone (2007): no remuxable profile found, so video stream will be transcoded
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Cannot direct stream video stream due to profile or setting limitations
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] Codecs: testing hevc (decoder) with hwdevice vaapi
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] Codecs: hardware transcoding: testing API vaapi for device '/dev/dri/renderD128' (DG2 [Arc A380])
Apr 13, 2024 22:38:41.290 [139703057656632] ERROR - [Req#50/Transcode] [FFMPEG] - No VA display found for device /dev/dri/renderD128.
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] Codecs: hardware transcoding: opening hw device failed - probably not supported by this system, error: Invalid argument
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] Could not create hardware context for hevc
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Evangelion: 1.0 You Are (Not) Alone (2007): Audio Direct Streaming is disabled, so video's audio stream will be transcoded
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Cannot direct stream audio stream due to profile or setting limitations
Apr 13, 2024 22:38:41.290 [139703057656632] DEBUG - [Req#50/Transcode] MDE: Evangelion: 1.0 You Are (Not) Alone (2007): selected media 0 / 3105
Apr 13, 2024 22:38:41.291 [139703057656632] DEBUG - [Req#50/Transcode] Streaming Resource: Adding session 0x7f0f2ae147c8:u0yl83oxtzsgnoowfq4kfarr which is using transcoder slot.  Used slots is now 1
Apr 13, 2024 22:38:41.291 [139703057656632] DEBUG - [Req#50/Transcode] Streaming Resource: Added session 0x7f0f2ae147c8:u0yl83oxtzsgnoowfq4kfarr
Apr 13, 2024 22:38:41.291 [139703057656632] DEBUG - [Req#50/Transcode] Streaming Resource: Reached Decision id=3198 codes=(General=1001,Direct play not available; Conversion OK. Direct Play=3000,App cannot direct play this item. Direct play is disabled. Transcode=1001,Direct play not available; Conversion OK.) media=(id=3105 part=(id=3108 decision=transcode container=mp4 protocol=dash streams=(Video=(id=5587 decision=transcode bitrate=2147483647 encoder=libx264 width=1920 height=1080) Audio=(id=5591 decision=transcode bitrate=256 encoder=aac channels=2 rate=48000) Subtitle=(id=5592 decision=transcode bitrate=2147483647 encoder=ass languageCode=spa location=sidecar))))
Apr 13, 2024 22:38:41.291 [139703112182584] DEBUG - Completed: [192.168.1.145:56580] 200 GET /video/:/transcode/universal/decision?hasMDE=1&path=%2Flibrary%2Fmetadata%2F3198&mediaIndex=0&partIndex=0&protocol=dash&fastSeek=1&directPlay=0&directStream=0&subtitleSize=50&audioBoost=100&location=lan&addDebugOverlay=0&autoAdjustQuality=1&directStreamAudio=0&mediaBufferSize=102400&session=pg6vfwl149hbwmpuyssd5qbi&subtitles=auto&Accept-Language=es (13 live) #50 TLS GZIP 6ms 3447 bytes (pipelined: 9)
Apr 13, 2024 22:38:41.381 [139703078628152] DEBUG - Request: [192.168.1.145:56580 (Subnet)] GET /video/:/transcode/universal/start.mpd?hasMDE=1&path=%2Flibrary%2Fmetadata%2F3198&mediaIndex=0&partIndex=0&protocol=dash&fastSeek=1&directPlay=0&directStream=0&subtitleSize=50&audioBoost=100&location=lan&addDebugOverlay=0&autoAdjustQuality=1&directStreamAudio=0&mediaBufferSize=102400&session=pg6vfwl149hbwmpuyssd5qbi&subtitles=auto&Accept-Language=es (13 live) #53 TLS GZIP Signed-in Token (user) (Firefox)
Apr 13, 2024 22:38:41.381 [139703078628152] DEBUG - [Req#53/Transcode] Found session GUID of pg6vfwl149hbwmpuyssd5qbi in session start.
Apr 13, 2024 22:38:41.381 [139703078628152] DEBUG - [Req#53/Transcode] TranscodeUniversalRequest: adapting profile with augmentation data: append-transcode-target-codec(type=videoProfile&context=streaming&audioCodec=aac&protocol=dash)
Apr 13, 2024 22:38:41.381 [139703078628152] DEBUG - [Req#53/Transcode] TranscodeUniversalRequest: using augmented profile Firefox
Apr 13, 2024 22:38:41.381 [139703078628152] DEBUG - [Req#53/Transcode] Downloading document http://127.0.0.1:32400/library/metadata/3198?checkFiles=1&includeBandwidths=1&offset=-1&X-Plex-Incomplete-Segments=1&X-Plex-Session-Identifier=u0yl83oxtzsgnoowfq4kfarr
Apr 13, 2024 22:38:41.384 [139703078628152] DEBUG - [Req#53/Transcode] Audio Stream: 5591, Subtitle Stream: 5592
Apr 13, 2024 22:38:41.385 [139703078628152] DEBUG - [Req#53/Transcode] Found session GUID of pg6vfwl149hbwmpuyssd5qbi in session start.
Apr 13, 2024 22:38:41.385 [139703078628152] DEBUG - [Req#53/Transcode] Cleaning directory for session pg6vfwl149hbwmpuyssd5qbi ()
Apr 13, 2024 22:38:41.385 [139703078628152] DEBUG - [Req#53/Transcode] Starting a transcode session pg6vfwl149hbwmpuyssd5qbi at offset -1.0 (state=3)
Apr 13, 2024 22:38:41.386 [139703078628152] DEBUG - [Req#53/Transcode] TPU: hardware transcoding: enabled, but no hardware decode accelerator found
Apr 13, 2024 22:38:41.386 [139703078628152] DEBUG - [Req#53/Transcode] [Universal] Using local file path instead of URL: /mnt/raid/Videos/Movies/Evangelion: 1.0 You Are (Not) Alone (2007)/Evangelion: You Are (Not) Alone.mkv
Apr 13, 2024 22:38:41.386 [139703078628152] DEBUG - [Req#53/Transcode] TPU: hardware transcoding: final decoder: , final encoder: 
Apr 13, 2024 22:38:41.386 [139703078628152] DEBUG - [Req#53/Transcode/JobRunner] Job running: FFMPEG_EXTERNAL_LIBS='/var/lib/plexmediaserver/Library/Application\ Support/Plex\ Media\ Server/Codecs/ad47460-4673-linux-x86_64/' X_PLEX_TOKEN=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx "/usr/lib/plexmediaserver/Plex Transcoder" -codec:0 hevc -codec:4 flac -analyzeduration 20000000 -probesize 20000000 -i "/mnt/raid/Videos/Movies/Evangelion: 1.0 You Are (Not) Alone (2007)/Evangelion: You Are (Not) Alone.mkv" -filter_complex "[0:0]scale=w=1920:h=1080:force_divisible_by=4[0];[0]format=pix_fmts=yuv420p|nv12[1]" -map "[1]" -codec:0 libx264 -crf:0 16 -r:0 23.975999999999999 -preset:0 veryfast -x264opts:0 subme=0:me_range=4:rc_lookahead=10:me=hex:8x8dct=0:partitions=none -force_key_frames:0 "expr:gte(t,n_forced*3)" -filter_complex "[0:4] aresample=async=1:ochl='stereo':rematrix_maxval=0.000000dB:osr=48000[2]" -map "[2]" -metadata:s:1 language=jpn -codec:1 aac -b:1 256k -f dash -seg_duration 3 -dash_segment_type mp4 -init_seg_name 'init-stream$RepresentationID$.m4s' -media_seg_name 'chunk-stream$RepresentationID$-$Number%05d$.m4s' -window_size 5 -delete_removed false -skip_to_segment 1 -time_delta 0.0625 -manifest_name "http://127.0.0.1:32400/video/:/transcode/session/pg6vfwl149hbwmpuyssd5qbi/dc07108f-9bd0-4183-bfcf-736448a20854/manifest?X-Plex-Http-Pipeline=infinite" -avoid_negative_ts disabled -map_metadata -1 -map_chapters -1 dash -map 0:5 -metadata:s:0 language=spa -codec:0 ass -strict_ts:0 0 -f segment -segment_format ass -segment_time 1 -segment_header_filename sub-header -segment_start_number 0 -segment_list "http://127.0.0.1:32400/video/:/transcode/session/pg6vfwl149hbwmpuyssd5qbi/dc07108f-9bd0-4183-bfcf-736448a20854/manifest?stream=subtitles&X-Plex-Http-Pipeline=infinite" -segment_list_type csv -segment_list_size 5 -segment_list_separate_stream_times 1 -segment_format_options ignore_readorder=1 -segment_list_unfinished 1 -fflags +flush_packets "sub-chunk-%05d" -start_at_zero -copyts -vsync cfr -y -nostats -loglevel quiet -loglevel_plex error -progressurl http://127.0.0.1:32400/video/:/transcode/session/pg6vfwl149hbwmpuyssd5qbi/dc07108f-9bd0-4183-bfcf-736448a20854/progress

Intel Arc A380 has no issues encoding on Handbrake with the QSV encoder, GUC and HUC firmware is loaded. Using packman Mesa 24.0.3 with hardware accelerated codecs enabled, intel-media-driver installed, also ffmpeg 6 from packman too with all non-free codecs installed.
openSUSE Tumbleweed kernel 6.8.5-1

vainfo:

Trying display: wayland
libva info: VA-API version 1.20.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_20
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.20 (libva 2.20.1)
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 24.1.3 ()
vainfo: Supported profile and entrypoints
      VAProfileNone                   :	VAEntrypointVideoProc
      VAProfileNone                   :	VAEntrypointStats
      VAProfileMPEG2Simple            :	VAEntrypointVLD
      VAProfileMPEG2Main              :	VAEntrypointVLD
      VAProfileH264Main               :	VAEntrypointVLD
      VAProfileH264Main               :	VAEntrypointEncSliceLP
      VAProfileH264High               :	VAEntrypointVLD
      VAProfileH264High               :	VAEntrypointEncSliceLP
      VAProfileJPEGBaseline           :	VAEntrypointVLD
      VAProfileJPEGBaseline           :	VAEntrypointEncPicture
      VAProfileH264ConstrainedBaseline:	VAEntrypointVLD
      VAProfileH264ConstrainedBaseline:	VAEntrypointEncSliceLP
      VAProfileHEVCMain               :	VAEntrypointVLD
      VAProfileHEVCMain               :	VAEntrypointEncSliceLP
      VAProfileHEVCMain10             :	VAEntrypointVLD
      VAProfileHEVCMain10             :	VAEntrypointEncSliceLP
      VAProfileVP9Profile0            :	VAEntrypointVLD
      VAProfileVP9Profile0            :	VAEntrypointEncSliceLP
      VAProfileVP9Profile1            :	VAEntrypointVLD
      VAProfileVP9Profile1            :	VAEntrypointEncSliceLP
      VAProfileVP9Profile2            :	VAEntrypointVLD
      VAProfileVP9Profile2            :	VAEntrypointEncSliceLP
      VAProfileVP9Profile3            :	VAEntrypointVLD
      VAProfileVP9Profile3            :	VAEntrypointEncSliceLP
      VAProfileHEVCMain12             :	VAEntrypointVLD
      VAProfileHEVCMain422_10         :	VAEntrypointVLD
      VAProfileHEVCMain422_10         :	VAEntrypointEncSliceLP
      VAProfileHEVCMain422_12         :	VAEntrypointVLD
      VAProfileHEVCMain444            :	VAEntrypointVLD
      VAProfileHEVCMain444            :	VAEntrypointEncSliceLP
      VAProfileHEVCMain444_10         :	VAEntrypointVLD
      VAProfileHEVCMain444_10         :	VAEntrypointEncSliceLP
      VAProfileHEVCMain444_12         :	VAEntrypointVLD
      VAProfileHEVCSccMain            :	VAEntrypointVLD
      VAProfileHEVCSccMain            :	VAEntrypointEncSliceLP
      VAProfileHEVCSccMain10          :	VAEntrypointVLD
      VAProfileHEVCSccMain10          :	VAEntrypointEncSliceLP
      VAProfileHEVCSccMain444         :	VAEntrypointVLD
      VAProfileHEVCSccMain444         :	VAEntrypointEncSliceLP
      VAProfileAV1Profile0            :	VAEntrypointVLD
      VAProfileAV1Profile0            :	VAEntrypointEncSliceLP
      VAProfileHEVCSccMain444_10      :	VAEntrypointVLD
      VAProfileHEVCSccMain444_10      :	VAEntrypointEncSliceLP
2

Anyone?

3

Similar issue here. Apple TV won’t direct play 4k videos if PGS captions are enabled.

4

That’s normal, PGS is an image subtitle format. You would have to either download srt subtitles from a website like opensubtitles or importing the video with the subtitles into a subtitle editor like Subtitle Edit and do OCR on the PGS and then save as .srt.

5

I humbly disagree. Yes, it’s an image based format. However, iOS and AppleTV have support for it. Direct play to my iPhone using Plex with PGS works just fine - no transcoding required. The same doesn’t hold true for Apple TV. Other players, like infuse work just fine on Apple TV too with PGS - no transcoding required. So the issue has something to do with plex’s Apple TV player, not the media or subtitle format.

6

The difference between the Plex and Infuse apps is Metal.

Infuse is native Metal implementation. Plex is MPV based (OpenGL+OpenCL).

There is work in progress but I have no other insight about that effort.

PGS subs, like all other image based subtitles, on AppleTV, will require burning for now.

7

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