Videojs: 0.4.1.1: hls_startfromlevel=0 playing audio version, not lowest non-audio

[tommyh]

When I set hls_startfromlevel=0 the player is playing the lowest bitrate version (ie the 64k audio), but it's not playing the "lowest non-audio bitrate" version.

Expected behavior: hls_startfromlevel=0 should result in a video level to play.
Actual behavior: hls_startfromlevel=0 results in the audio level playing.

Page to reproduce: http://rawgit.com/tommyh/7cb64812be249660e8bd/raw/d45b964ed8ab3109375a7b65e63de7651876ec27/hls_startfromlevel_0.html

My m3u8 file is:

#EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2040000
272deb0e2c488b98-2040k.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1540000
272deb0e2c488b98-1540k.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1040000
272deb0e2c488b98-1040k.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=640000
272deb0e2c488b98-640k.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=440000
272deb0e2c488b98-440k.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=240000
272deb0e2c488b98-240k.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=64000
272deb0e2c488b98-64k.m3u8

Does this issue mean:

• my m3u8 file isn't giving enough data to flashls to distinguish an audio level vs a video level? (ie: do I need to set a CODECS attribute?)
• the m3u8 file is fine but there is an issue in flashls where it is incorrectly processing the levels and thinks the 64k stream has video?

Note 1: Our hls video is being encoded by zencoder, if that makes a difference.

Note 2: To make sure #351 is not messing up my test for hls_startfromlevel I have also made a page with hls_startfromlevel=1 and that page appears to function correctly by giving the highest bitrate channel: http://rawgit.com/tommyh/7cb64812be249660e8bd/raw/d45b964ed8ab3109375a7b65e63de7651876ec27/hls_startfromlevel_1.html

[mangui]

flashls will use the level you asked for ... if you hardcode startlevel to 0, the lowest bitrate will be used. and if level 0 is audio only,

you should better not configure startLevel (or set it to -1) to let flashls decide and avoid such kind of issues.
also, as you didn't set the CODECS attribute, there is no way flashls could guess that level 0 is audio-only ...
plz refer to the logic here
https://github.com/mangui/flashls/blob/dev/src/org/mangui/hls/controller/LevelController.as#L301-L346