YouTube Android API seekToMillis() not working accurately -

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while using youtubeplayer.seektomillis() function, there seek delay of 2 seconds. not 2 seconds, so. if try seek between 10,000 milliseconds , 12,000 milliseconds (eg: 11,000 11,500, 11,550). video started 10,000 itself. if give value between 12,000 , 14,000 goes 12,000 point.. , on...

we developing app youtube has start accurate time specified. hence function quite crucial us. 

youtubeplayer.seektomillis(10000); youtubeplayer.play();

please show hints how can start video youtube player precise starting time, if possible precisely millisecond.

this not bug, this standard behavior of seekable-compressed video file.

short , super-simplified explanation

a compressed video file composed sequence of frames. there 2 macro-types of frame, full frames (f) , partial frames (p*):

  • full frame: contains full real frame @ specific time (like full jpeg image)
  • partial frame set of differences in relation previous frame, expressed motion vectors.

raw video sequence:

f f f f f f f f f f f f f f f f f f ... (eof)

compressed video sequence:

f p p p p f p p p p f p p p p p f p p ... (eof)

a compressed structure allows create smaller file (because partial frames smaller full frames), introduces silly problem: it not possible start playback directly partial frame because, in order decode correctly, need ascend until first full frame!

this problem experiencing: seeking specific time mapped on partial frame, need go nearest full frame , start playback there.

in streming context youtube problem more difficult because header trick limitation using, example, fast forward approach.

as written above, simplified explanation. can find more information here.


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