Opened 8 years ago

Last modified 8 years ago

#2600 open enhancement

print EXT-X-STREAM-INF and BANDWIDTH in output M3U8

Reported by: vkroutik Owned by:
Priority: wish Component: avformat
Version: git-master Keywords: hls segment m3u8
Cc: Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no

Description (last modified by saste)

Summary of the ticket:

add support to EXT-X-STREAM-INF and BANDWIDTH field in the generated M3U8 output.

Here is spec from


The value is a decimal-integer of bits per second. It MUST be an
upper bound of the overall bitrate of each media segment (calculated
to include container overhead) that appears or will appear in the

Every EXT-X-STREAM-INF tag MUST include the BANDWIDTH attribute

Here is command line:

C:\ffmpeg\ffmpeg.exe -re -i "rtmp://bar/foo.flv" -y -c:v copy -c:a copy -hls_time 6 -hls_list_size 5 -hls_wrap 30 -start_number 1 "C:\Tools\Foo\stream.m3u8"

Change History (6)

comment:1 Changed 8 years ago by cehoyos

  • Component changed from undetermined to avformat
  • Keywords hls added
  • Priority changed from important to normal

comment:2 Changed 8 years ago by cehoyos

I don't see an EXT-X-STREAM-INF element in m3u8 files produced by FFmpeg - please provide your command line, your complete, uncut console output and the m3u8 file to make this a reproducible ticket.

comment:3 Changed 8 years ago by cehoyos

  • Resolution set to needs_more_info
  • Status changed from new to closed

To the best of my knowledge, there is no bug: BANDWIDTH only exists within EXT-X-STREAM-INF which is optional and not written by FFmpeg.
Please reopen the ticket if you can clarify your issue.

comment:4 Changed 8 years ago by vkroutik

  • Resolution needs_more_info deleted
  • Status changed from closed to reopened
  • Type changed from defect to enhancement

I guess you are right, it should be a feature to write out EXT-X-STREAM-INF. Changing ticket into feature request.

comment:5 Changed 8 years ago by cehoyos

  • Priority changed from normal to wish
  • Reproduced by developer set
  • Status changed from reopened to open
  • Version changed from unspecified to git-master

comment:6 Changed 8 years ago by saste

  • Description modified (diff)
  • Keywords segment m3u8 added
  • Summary changed from m3u8 file generated is not up to published specs to print EXT-X-STREAM-INF and BANDWIDTH in output M3U8
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