when i converted to hls av1 video format, the video was not playing in vlc but the audio was playing?

[udhayNuk]

./ffmpeg -i Aaruyire.mkv -max_muxing_queue_size 1024 -preset ultrafast -c:v copy -c:a copy -b:a 128k -ac 2 -f hls -hls_time 2 -hls_list_size 0 master.m3u8

when i converted av1 to hls video format, the video was not playing in vlc but the audio was playing

how to solve this?