Encryption Key deleted when append an HLS M3u8 Playlist

[JohnPi]

Hi,

When i append (with "-hls_flags append_list" parameter) a m3u8 playlist which is encrypted with AES-128 , the original key is deleted :

With the command : "ffmpeg -y -loglevel debug -re -i "udp://239.192.0.2:1234?fifo_size=5000000&overrun_nonfatal=1" -c:v libx264 -profile:v main -level 3.1 -preset ultrafast -s 960x540 -b:v 1500k -crf:v 25 -b:a 96k -hls_time 2 -hls_list_size 5 -hls_wrap 5 -hls_flags append_list -hls_allow_cache 0 -hls_key_info_file /var/www/HLSKEY/file2.keyinfo "/var/www/HLS/B.m3u8" "

(Before Appending the list)
#EXT-X-KEY:METHOD=AES-128,URI="http://10.11.0.101/HLSKEY/file2.key"

(After appending the list)
#EXT-X-KEY:METHOD=AES-128,URI=""

Copy of the list :

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:11
#EXT-X-MEDIA-SEQUENCE:1
#EXT-X-KEY:METHOD=AES-128,URI=""
#EXTINF:10.021333,
B1.ts
#EXTINF:10.000000,
B2.ts
#EXTINF:10.000000,
B3.ts
#EXTINF:10.000000,
B4.ts
#EXT-X-KEY:METHOD=AES-128,URI="http://10.11.0.101/HLSKEY/file2.key"
#EXT-X-DISCONTINUITY
#EXTINF:10.000000,
C8.ts
#EXTINF:10.000000,
C9.ts
#EXTINF:10.000000,
C0.ts
#EXTINF:10.000000,

i think its a bug in /libavformat/hlsenc.c .

thank you :)

[Steven Liu]

​https://patchwork.ffmpeg.org/patch/3491/

Try this patch please.

[JohnPi]

It's working thank you for the patch .

[Steven Liu]

fixed-id: 363e4f0810d4085bbee3dced41a2de2d2c135dca