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

Robert Smith wmk587 at yahoo.com
Mon Nov 8 16:15:35 EET 2021

 Hi Gonzalo,

Thank you for the info
    On Saturday, November 6, 2021, 11:39:02 PM EDT, Gonzalo Garramuño <ggarra13 at gmail.com> wrote:  

 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,
                                                0, NULL);
Hope that helps!

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