[Libav-user] How to transcode without usage of av_opt_set_sample_fmt function

[Gonzalo Garramuño]

El 6/11/21 a las 23:35, Robert Smith via Libav-user escribió:
>
> If I skip setting setting sample format option the swr_init display 
> warning
>
> [SWR @ 0x2c7b950] Requested sample format (null) is not supported 
> internally, only float & S16 is supported
>
> and eventually swr_convert fails on assertion:
> Assertion a->planar failed at libswresample/swresample.c:284
>
> Could you advise how to resolve this issue? Thanks
>
See if there's a swr_alloc_set_opts function in your libav.  If there 
is, you can pass all the flags like:

   swr_ctx  = swr_alloc_set_opts(NULL, out_ch_layout,
                                                out_sample_fmt, 
out_sample_rate,
                                                in_ch_layout, in_sample_fmt,
                                                in_sample_rate,
                                                0, NULL);

Hope that helps!

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