video playback stutters in a specific scenario with alternative audio playlist

[rajubabannavar]

Hi,

Scenario:
When you are playing an alternative audio playlist in flash, and the available bandwidth is lower than the lowest bitrate, audio chunks will get downloaded faster than video chunks and pushed to (_hls.stream as HLSNetStream).appendTags(tags). This leads to meet the minbuffer length (click here to see the code snippet) condition and force the video to play mode even though enough video frames are not available.

Steps to reproduce:

• Open this link in chrome browser
  http://www.flashls.org/latest/examples/chromeless/?src=http%3A%2F%2Fsample.vodobox.com%2Fplanete_interdite%2Fplanete_interdite_alternate.m3u8

• Manually throttle the network to 500kbps in chrome network options.

• seek to non-buffered timeline position and observe the above described issue.

Any direction here will be very helpful.
@mangui @jlacivita @kfeinUI @neilrackett