hls muxer writes a corrupted init filename when segmenting to fmp4 unless absolute path provided

[pickles]

Summary of the bug:

As discussed in comments 3-5 in #6776, the hls muxer creates an init file with a corrupted filename when segmenting to fmp4 unless hls_fmp4_init_filename is set with an absolute filename.

How to reproduce:

ffmpeg -f lavfi -i testsrc -hls_segment_filename '%d.m4s' -hls_segment_type fmp4 -hls_fmp4_init_filename init.mp4 -f hls -t 30 fmp4.m3u8

This should create a file init.mp4 in the current directory, but, as no absolute path is given, it writes a corrupted filename to the current directory instead.

[pickles]

Update: It seems to only occur if hls_segment_filename is set.

[stevenliu]

let me fix it

[stevenliu]

try this patch please:
​https://patchwork.ffmpeg.org/patch/5693/

[pickles]

I can confirm that the patch works and fixes the problem. Thanks!

[stevenliu]

fixed by commit id: f5208307618d992ddd2d96866cf5a267c9bc7165