[Cin] Filter initialization change in git relative to 7.0?

[Terje J. Hanssen]

Den 14.05.2025 04:04, skrev Andrew Randrianasulu via Cin:
> Even if our code compiles it does not work anymore ...
>
> [out @ 0xe1821180] Option 'pix_fmts' is not a runtime option and so
> cannot be set after the object has been initialized
>
>          int ret = 0;  char args[BCTEXTLEN];
>          AVPixelFormat pix_fmt = (AVPixelFormat)avpar->format;
>          snprintf(args, sizeof(args),
>
> "video_size=%dx%d:pix_fmt=%i:time_base=%d/%d:pixel_aspect=%d/%d",
>                  avpar->width, avpar->height,(int)pix_fmt,
>                  st->time_base.num, st->time_base.den, sa_num, sa_den);
>          if( ret >= 0 ) {
>                  filt_ctx = 0;
>                  ret = insert_filter("buffer", args, "in");
>                  buffersrc_ctx = filt_ctx;
>          }
>          if( ret >= 0 )
>                  ret = flip(theta);
>          AVFilterContext *fsrc = filt_ctx;
>          if( ret >= 0 ) {
>                  filt_ctx = 0;
>                  ret = insert_filter("buffersink", 0, "out");
>                  buffersink_ctx = filt_ctx;
>          }
>          if( ret >= 0 ) {
>                  ret = av_opt_set_bin(buffersink_ctx, "pix_fmts",
>                          (uint8_t*)&pix_fmt, sizeof(pix_fmt),
>                          AV_OPT_SEARCH_CHILDREN);
>          }
>          if( ret >= 0 )
>                  ret = config_filters(filter_spec, fsrc);
>          else
>                  ff_err(ret, "FFVideoStream::create_filter");
>          return ret >= 0 ? 0 : -1;
>
>
> =========
>
> There is no video filtering example in doc/examples.
>
> How I supposed to know what should be put there now?

I have read a discussion on reddit that -pix_fmt possibly is 
deprecated(?) in favour of -vf format= or -pixel_format
https://www.reddit.com/r/ffmpeg/comments/1du0mia/vf_formatpixel_format_vs_pix_fmt_pixel_format/