allow to set file name prefix for the segment names inside the generated m3u8 file

[mpapp]

Summary of the bug:

This is relevant when using segment option in ffmpeg
I cannot see such option
For vlc, there is an option
,index-url=​http://37.188.125.31/demo/medium-########.ts}
which specifies in what format the filenames are saved inside the m3u8.

I am sorry if I missed it.

[Stefano Sabatini]

Replying to mpapp:

Summary of the bug:
How to reproduce:

This is relevant when using segment option in ffmpeg
I cannot see such option
For vlc, there is an option
,index-url=http://37.188.125.31/demo/medium-########.ts}
which specifies in what format the filenames are saved inside the m3u8.

Your request is not clear. I suppose you want an option like:

ffmpeg -i INPUT -f segment ... -segment_list out.m3u8 -segment_list_prefix "http://37.188.125.31/demo/" medium-%03d.ts 

Correct?

Or do you want the name in the M3U8 to be *different* from the segment filename (not only the prefix)?

Can you elaborate what this would be useful for?

I am sorry if I missed it.
}}}

[mpapp]

yes, a -segment_list_prefix "​http://37.188.125.31/demo/"

which would replace any directory prefix deduced from medium-%03d.ts

There is a practical reason , of course.
OK, supposed you want to generate m3u8 for web use.
Then the filenames inside in m3u8 should be referenced someone differently using http... way.
Some video players like it this way. (E.g. IPhone) So if you want to serve the net, you need this.

It would be useful not only for http requests but I want to use different way of referencing files.
E.g. if I use use full path e.g. /root/video/medium-%03d.ts, then the files will also contain /root/video... prefix as it is implemented right now.
-segment_list_prefix "" would remove those prefixes...

[Stefano Sabatini]

I believe this should be fixed in:

commit 5e278c19c752d65fdc1da1ceb599b091f71a4b4b
Author: Stefano Sabatini <stefasab@gmail.com>
Date:   Fri Nov 22 12:49:05 2013 +0100

    lavf/segment: add segment_list_entry_prefix option
    
    This option allows to add a prefix to the segment list entry filenames.
    
    Also set by default the list entry filenames to the corresponding
    segment basename, consistent with the HLS muxer.
    
    Based on an idea by Steven Liu <lingjiujianke@gmail.com>.

The new option allows to set the prefix to use for the playlist file.