[FFmpeg-user] Adaptive Streaming between heaac and lcaac

[Ronak Patel]

> On Jun 21, 2018, at 9:02 AM, Ronak Patel <ronak2121-at-yahoo.com at ffmpeg.org> wrote:
> 
> 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?


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