[FFmpeg-user] Adaptive Streaming between heaac and lcaac

[Ronak]

>> Hi,
>> 
>> We are trying to setup an adaptive stream across two heaac streams and higher order lcaac ones.
>> 
>> So we’d have something like so:
>> 
>> HEAACv2 44khz/32kbps
>> HEAACv2 44/64
>> LCAAC 44/128
>> LCAAC 44/256
>> LCAAC 44/320
>> 
>> I setup a test stream this way and I’m seeing some problems.
>> 
>> Exoplayer is seeing this stream as not being able to support seamless adaptive switching because the defaultSampleDurations in the HE-AACv2 fMP4's moof boxes is 2048 while the LC-AAC file has 1024.
>> 
>> Why does HE-AACv2 have a higher sample duration when the sampling rate is supposed to be 44100, equivalent to the sampling rate of the LC-AAC audio?
>> 
> 
> 
> Has anyone ever tried to do this before? Is this a problem with how ffmpeg is generating the HEAACv2 fmp4 files?
> 
> 


Could anyone please shed any light on why the defaultSampleDurations in moof are different between LC & HE-AAC at the same sampling rates?



>> Thanks,
>> 
>> Ronak
>> _______________________________________________
>> ffmpeg-user mailing list
>> ffmpeg-user at ffmpeg.org <mailto:ffmpeg-user at ffmpeg.org>
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user <http://ffmpeg.org/mailman/listinfo/ffmpeg-user>
>> 
>> To unsubscribe, visit link above, or email
>> ffmpeg-user-request at ffmpeg.org <mailto:ffmpeg-user-request at ffmpeg.org> with subject "unsubscribe".
> 
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org <mailto:ffmpeg-user at ffmpeg.org>
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user <http://ffmpeg.org/mailman/listinfo/ffmpeg-user>
> 
> To unsubscribe, visit link above, or email
> ffmpeg-user-request at ffmpeg.org <mailto:ffmpeg-user-request at ffmpeg.org> with subject "unsubscribe".