the last few seconds of mp4 is not playable in windows media player

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MP4Box -dash 30000 -profile onDemand music_normal.mp4 -out music.mpd --dual
play music_normal_dashinit.mp4 in windows media player
when seek to the last part of the video. it is not playable and will jump back to the beggining .
no problem on other player .

@jeanlf in the last issue (#2488)
you mentioned
"
Here's what I checked:
dashing using 15s segments instead of 30s: playback until end OK
dashing video only with 30s segments: playback until end OK
dashing audio only with 30s segments: playback until end OK
The segment durations in 30s Audio+Video and 30s VideoOnly are the same, and the last segments are correct.

I think that's a WMP bug, there's not much we can do here.
"

I have set the segments to 29s 20s 15s , playback is OK.
babcock_15.m3u8.txt
babcock_29.m3u8.txt
babcock_30.m3u8.txt
babcock_15 and babcock_29 plays ok

for the same mp4 I use different version of mp4box ,the segment is different .
20230922_new30.m3u8.txt
20230922_org30.m3u8.txt
20230922_new30 plays ok

looks like this issue is related to segment strategy

do you still have the mp4 file(timely.mp4) mentioned in #2488 ?
we have a lot of cases here, however ,I could not send them to you , for it is customer data.

timely.zip
here is what I can provide
timly_29.m3u8 plays OK
while
timly_30.m3u8 last few seconds is not playable.

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ffmpeg -loglevel warning -i rawdata.m3u8 -filter_complex "[0:v]scale=1920:1080:force_original_aspect_ratio=decrease, pad=1920:1080:(1920-in_w)/2:(1080-in_h)/2[v0]" -map "[v0]" -map "0:a" -y -preset veryfast -r 25 -g 750 -movflags +faststart -bsf:a aac_adtstoasc -vsync 1 -async 1 -af aresample=async=1 -avoid_negative_ts 1 -tune stillimage -max_muxing_queue_size 1024 normal.mp4

MP4Box -dash 30000 -profile onDemand normal.mp4 -out music.mpd --dual

the whole mp4 generated process is above.
-r 25 -g 750 set the gop to 30 seconds
however we did not set sc_threhold , so some segment is shorter than 30s
the -dash 30000 segment sometimes >30s , sometimes <30s
Even a single segment can sometimes merge with another segment (>30s) or remain separate (<30s) based on different -dash parameters.
I wonder the logic behind it. looks like such logic cause windows media player is not play well at the last few seconds.

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timely_faststart.zip
I dump the file here
mp4box -diso timely_faststart.mp4