ios - audio slow motion like default Slo-Mo Camera functionality using 240FPS -


i want implement slowmotion video defalut functionality of slo-mo in camera , used following code , worked fine video. in audio track of video not working properly.

   double videoscalefactor =8.0;    compositionaudiotrack scaletimerange:cmtimerangemake(kcmtimezero, videoduration)                                      toduration:cmtimemake(videoduration.value* videoscalefactor,videoduration.timescale)];  [compositionvideotrack scaletimerange:cmtimerangemake(kcmtimezero, videoduration)    toduration:cmtimemake(videoduration.value* videoscalefactor, videoduration.timescale)];   scenario woking video slowmotion.but in audio slow-motion not working...

please me..

i found solution of audio slowmotion

double videoscalefactor =8.0;

[compositionaudiotrack scaletimerange:cmtimerangemake(kcmtimezero, videoduration) toduration:cmtimemake(videoduration.value* videoscalefactor,videoduration.timescale)];

its working not working in avplayer have set following property of avplayeritem

avplayeritem *playeritem = nil;

playeritem.audiotimepitchalgorithm = avaudiotimepitchalgorithmvarispeed;


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