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+--- Thread: AV1 Transcoding Playback Failure (/t-av1-transcoding-playback-failure)
AV1 Transcoding Playback Failure - conor - 2025-11-26
When transcoding to AV1 the video is in a non-standard container and the Jellyfin ffmpeg log gives the below warning.
[mpegts @ 0x7f78e0220580] Stream 0, codec av1, is muxed as a private data stream and may not be recognized upon reading.
Audio plays but there's no video stream recognised in Kodi or VLC with the Jellyfin generated ffmpeg command.
Changing hls_segment_type to fmp4 gives a stream that plays successfully in VLC.
AV1 transcoding worked in 10.10 for me, has something changed in 10.11?
Original non-working ffmpeg command (AMD 780m GPU).
Code:
/usr/lib/jellyfin-ffmpeg/ffmpeg \
-analyzeduration 200M \
-probesize 1G \
-f matroska \
-init_hw_device drm=dr:/dev/dri/renderD128 \
-init_hw_device vaapi=va@dr \
-init_hw_device vulkan=vk@dr \
-filter_hw_device vk \
-hwaccel vaapi \
-hwaccel_output_format vaapi \
-noautorotate \
-i "file:/media/test/input.mkv" \
-noautoscale \
-map_metadata -1 \
-map_chapters -1 \
-threads 0 \
-map 0:0 -map 0:1 -map -0:s \
-codec:v:0 av1_vaapi \
-rc_mode VBR \
-b:v 5666112 \
-maxrate 5666112 \
-bufsize 11332224 \
-force_key_frames:0 "expr:gte(t,n_forced*3)" \
-vf "setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709,scale_vaapi=format=nv12" \
-codec:a:0 ac3 \
-ac 6 \
-ab 256000 \
-ar 48000 \
-copyts \
-avoid_negative_ts disabled \
-max_muxing_queue_size 2048 \
-f hls \
-max_delay 5000000 \
-hls_time 3 \
-hls_segment_type mpegts \
-hls_playlist_type vod \
-hls_list_size 0 \
-start_number 0 \
-hls_segment_filename "/media/encode/test2/5469b5100c67ae2c9b18e3ee80d56c8b%d.ts" \
-y "/media/encode/test2/5469b5100c67ae2c9b18e3ee80d56c8b.m3u8"