Avoiding transcoding ...

[jellyfin]

Great many thanks. @bitmap and @TheDreadPirate!

I created a test file with a single AAC track (and H264) to check if this avoid transcoding.

But ffmpeg still get's executed:

Code:

[2025-01-13 22:00:48.894 +01:00] [INF] [90] Jellyfin.Api.Helpers.MediaInfoHelper: User policy for "user". EnablePlaybackRemuxing: True EnableVideoPlaybackTranscoding: True EnableAudioPlaybackTranscoding: True
[2025-01-13 22:00:49.249 +01:00] [INF] [3] MediaBrowser.MediaEncoding.Transcoding.TranscodeManager: "/Applications/Jellyfin.app/Contents/MacOS/ffmpeg" "-analyzeduration 200M -probesize 1G -fflags +genpts -f matroska  -i file:\"/Volumes/MEDIA/CONTENT/MOVIES/PRIDE_AND_PREJUDICE_2005/PRIDE_AND_PREJUDICE_H264_AAC_C1.mkv\" -map_metadata -1 -map_chapters -1 -threads 0 -map 0:0 -map 0:1 -map -0:s -codec:v:0 copy -bsf:v h264_mp4toannexb -start_at_zero -codec:a:0 aac_at -ac 2 -ab 256000 -af \"volume=2\" -copyts -avoid_negative_ts disabled -max_muxing_queue_size 2048 -f hls -max_delay 5000000 -hls_time 6 -hls_segment_type fmp4 -hls_fmp4_init_filename \"0594744946fabc12f84ceea5ee1051df-1.mp4\" -start_number 0 -hls_segment_filename \"/Users/user/Library/Application Support/jellyfin/cache/transcodes/0594744946fabc12f84ceea5ee1051df%d.mp4\" -hls_playlist_type vod -hls_list_size 0 -y \"/Users/user/Library/Application Support/jellyfin/cache/transcodes/0594744946fabc12f84ceea5ee1051df.m3u8\""
[2025-01-13 22:00:53.003 +01:00] [INF] [3] MediaBrowser.MediaEncoding.Transcoding.TranscodeManager: FFmpeg exited with code 0

And I still see LOTS of files below ~/Library/Application\ Support/jellyfin/cache/transcodes:

Code:

-rw-r--r--@ 1 tja  staff      1361 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df-1.mp4
-rw-r--r--@ 1 tja  staff  3444137 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df0.mp4
-rw-r--r--@ 1 tja  staff  4257370 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df1.mp4
-rw-r--r--@ 1 tja  staff  1102513 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df2.mp4
-rw-r--r--@ 1 tja  staff  1114032 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df3.mp4
-rw-r--r--@ 1 tja  staff  2581530 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df4.mp4
-rw-r--r--@ 1 tja  staff  3420159 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df5.mp4
-rw-r--r--@ 1 tja  staff  3928152 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df6.mp4
-rw-r--r--@ 1 tja  staff  4867317 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df7.mp4
-rw-r--r--@ 1 tja  staff  6283568 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df8.mp4
-rw-r--r--@ 1 tja  staff  9507165 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df9.mp4
-rw-r--r--@ 1 tja  staff  9132510 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df10.mp4
-rw-r--r--@ 1 tja  staff  7729512 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df11.mp4
-rw-r--r--@ 1 tja  staff  6501036 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df12.mp4
-rw-r--r--@ 1 tja  staff  5132511 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df13.mp4
-rw-r--r--@ 1 tja  staff  6142349 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df14.mp4
-rw-r--r--@ 1 tja  staff  3697508 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df15.mp4
-rw-r--r--@ 1 tja  staff  4249490 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df16.mp4
-rw-r--r--@ 1 tja  staff  6434149 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df17.mp4
-rw-r--r--@ 1 tja  staff  4630903 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df18.mp4
-rw-r--r--@ 1 tja  staff  6291989 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df19.mp4
-rw-r--r--@ 1 tja  staff  2314486 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df20.mp4
-rw-r--r--@ 1 tja  staff  3725373 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df21.mp4
-rw-r--r--@ 1 tja  staff  13749608 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df22.mp4
-rw-r--r--@ 1 tja  staff  3101756 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df23.mp4
-rw-r--r--@ 1 tja  staff  2819417 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df24.mp4
-rw-r--r--@ 1 tja  staff  8799467 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df25.mp4
-rw-r--r--@ 1 tja  staff  11601028 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df26.mp4
-rw-r--r--@ 1 tja  staff  1441272 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df27.mp4
-rw-r--r--@ 1 tja  staff  4091336 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df28.mp4
-rw-r--r--@ 1 tja  staff  5594222 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df29.mp4
-rw-r--r--@ 1 tja  staff  2791765 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df30.mp4
-rw-r--r--@ 1 tja  staff    885411 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df31.mp4
-rw-r--r--@ 1 tja  staff  2119006 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df32.mp4
-rw-r--r--@ 1 tja  staff  1679547 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df33.mp4
-rw-r--r--@ 1 tja  staff  1573869 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df34.mp4
-rw-r--r--@ 1 tja  staff  1534351 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df35.mp4
-rw-r--r--@ 1 tja  staff  1120546 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df36.mp4
-rw-r--r--@ 1 tja  staff  1281904 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df37.mp4
-rw-r--r--@ 1 tja  staff  1945745 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df38.mp4
-rw-r--r--@ 1 tja  staff  1155531 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df39.mp4
-rw-r--r--@ 1 tja  staff  3843598 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df40.mp4
-rw-r--r--@ 1 tja  staff  12146766 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df41.mp4
-rw-r--r--@ 1 tja  staff  5553562 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df42.mp4
-rw-r--r--@ 1 tja  staff  8376327 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df43.mp4
-rw-r--r--@ 1 tja  staff  7736080 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df44.mp4
-rw-r--r--@ 1 tja  staff  6844193 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df45.mp4
-rw-r--r--@ 1 tja  staff  8388941 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df46.mp4
-rw-r--r--@ 1 tja  staff  8452883 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df47.mp4
-rw-r--r--@ 1 tja  staff  3948250 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df48.mp4
-rw-r--r--@ 1 tja  staff  9872536 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df49.mp4
-rw-r--r--@ 1 tja  staff  12661761 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df50.mp4
-rw-r--r--@ 1 tja  staff  11363182 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df51.mp4
-rw-r--r--@ 1 tja  staff  7630908 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df52.mp4
-rw-r--r--@ 1 tja  staff  3815405 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df53.mp4
-rw-r--r--@ 1 tja  staff  2705807 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df54.mp4
-rw-r--r--@ 1 tja  staff  5828105 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df55.mp4
-rw-r--r--@ 1 tja  staff  6602322 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df56.mp4
-rw-r--r--@ 1 tja  staff  5783720 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df57.mp4
-rw-r--r--@ 1 tja  staff  9057551 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df58.mp4
-rw-r--r--@ 1 tja  staff  2495435 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df59.mp4
-rw-r--r--@ 1 tja  staff  3754756 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df60.mp4
-rw-r--r--@ 1 tja  staff      3652 Jan 13 22:00 0594744946fabc12f84ceea5ee1051df.m3u8

So this does not avoid transcoding.

I will test again with disabling transcoding for the user.