[bug]record m3u8 ,but output file not video format

[WLaoDuo]

[git commit e7eb3b4]

win11

.\hlsdl.exe -u https://b-hls-16.doppiocdn.com/hls/111375206/111375206.m3u8 -r true

The output is a file named "download",cant open with vlc, when I use imhex to view its binary, its beginning is not like video format.I use ffmpeg try to download it again,the result is a video file.

log:

.\hlsdl.exe -u https://b-hls-16.doppiocdn.com/hls/111375206/111375206.m3u8  -r true
2024/08/09 17:42:21 Start record live streaming movie...
2024/08/09 17:42:25 Recorded segment  8347
2024/08/09 17:42:25 Recorded segment  8348
2024/08/09 17:42:25 Recorded segment  8349
2024/08/09 17:42:26 Recorded segment  8350
2024/08/09 17:42:26 Recorded segment  8351
2024/08/09 17:42:29 Recorded segment  8352
2024/08/09 17:42:31 Recorded segment  8353
2024/08/09 17:42:34 Got stop signal
2024/08/09 17:42:34 Recorded file at  download

m3u8:

#EXTM3U
#EXT-X-VERSION:6
#EXT-X-TARGETDURATION:2
#EXT-X-INDEPENDENT-SEGMENTS
#EXT-X-MEDIA-SEQUENCE:8108
#EXT-X-DISCONTINUITY-SEQUENCE:2
#EXT-X-MAP:URI="https://b-hls-16.doppiocdn.com/hls/111375206/111375206_init_XC4S2CVZu2iTbllX.mp4"
#EXT-X-PROGRAM-DATE-TIME:2024-08-09T09:34:20.463+0000
#EXTINF:2.000
https://b-hls-16.doppiocdn.com/hls/111375206/111375206_8108_93cVdnn3KtYezhND_1723196060.mp4
#EXT-X-PROGRAM-DATE-TIME:2024-08-09T09:34:22.394+0000
#EXTINF:2.000
https://b-hls-16.doppiocdn.com/hls/111375206/111375206_8109_HvmYVjpt2ZVmQcpw_1723196062.mp4
#EXT-X-PROGRAM-DATE-TIME:2024-08-09T09:34:24.444+0000
#EXTINF:2.000
https://b-hls-16.doppiocdn.com/hls/111375206/111375206_8110_OCZpu2rdAgshDc6I_1723196064.mp4

the beginning binary of "download":

47 81 00 00 0B F4 00 00 4A 88 00 00 0B 9A 00 00 1E D8 00 00 0B 9A 00 00 3D B5 00 00 0B F4 00 00 59 CB 00 00 0B 9A 00 00 6D A9 00 00 0B 9A 00 00 4E 26 00 00 0B F4 00 00 56 28 00 00 0B 9A 00 00 48 11 00 00 0B 9A 00 00 20 21 00 00 0B F4 00 00 45 A2 00 00 01 0C 74 72 61 66 00 00 00 1C 74 66 68 64 00 02 00 38 00 00 00 02 00 00 03 FF 00 00 01 5C 02 00 00 00 00 00 00 14 74 66 64 74 01 00 00 00 00 00 00 00 31 F5 03 1D 00 00 00 D4 74 72 75 6E 00 00 03 01 00 00 00 18 00 05 53 57 00 00 03 FF 00 00 01 5C 00 00 04 00 00 00 01 5F 00 00 04 01 00 00 01 60 00 00 03 FF 00 00 01 69 00 00 04 00 00 00 01 5B 00 00 04 00 00 00 01 55 00 00 04 00 00 00 01 58 00 00 04 00 00 00 01 60 00 00 04 00 00 00 01 58 00 00 04 00 00 00 01 62 00 00 04 00 00 00 01 55 00 00 04 00 00 00 01 5E 00 00 04 00 00 00 01 50 00 00 04 00 00 00 01 8C 00 00 04 00 00 00 01 A1 00 00 04 00 00 00 01 58 00 00 04 00 00 00 01 51 00 00 04 00 00 00 01 4B 00 00 04 00 00 00 01 57 00 00 04 00 00 00 01 4B 00 00 04 00 00 00 01 52 00 00 04 00 00 00 01 48 00 00 04 00 00 00 01 4F 00 00 04 01 00 00 01 52 00 05 72 12 6D 64 61 74 00 00 00 25 67 4D 40 1F 95 90 05 00 5B B0 16 A0 20 20 28 00 00 1F 40 00 07 53 07 00 00 03 00 89 54 00 00 11 2A 8B 77 97 05 00 00 00 04 68 EB 8F 20 00 01 98 9F 65 B8 02 02 7F EF B9 EA 99 0D 47 F0 1A 93 4E F1 24 BA B7 6B 32 11 85 66 60 73 E3 70 78 90 DE CD 58 59 84 5A CC 23 57 AF 34 3A 27 CC 31 8C 29 B9 47 64 34 27 88 3D 30 B0 19 23 78 6B 74 03 E5 AE 37 54 39 94 F9 99 70 8F BE 94 49 EA C5 EB EB B1 0D 7A 79 01 85 21 14 5B B2 11 83 B4 95 0F B2 1C 4B B3 E7 E2 9B EA 2F E9 63 11 60 49 FF EE 86 5D 9D 70 1A D3 E1 9A 5B 22 2B B0 46 87 C4 C9 46 F8 95 D6 FB 57 62