[FFmpeg-devel] [PATCH v1 1/3] fftools: Add thumbnail output to vaapi_h264 decoder

[Zhou, Zachary]

> -----Original Message-----
> From: Zhou, Zachary
> Sent: Monday, April 8, 2019 3:10 PM
> To: ffmpeg-devel at ffmpeg.org
> Cc: Zhou, Zachary <zachary.zhou at intel.com>
> Subject: [PATCH v1 1/3] fftools: Add thumbnail output to vaapi_h264 decoder
> 
> This is sample code for reference
> 
> HW support for decode+scaling in a single HW command (VDBOX+SFC).
> The primary target usage is video analytics, but can be used playback,
> transcoding, etc.
> 
> For VAAPI -
> https://github.com/intel/libva
> basically, it allows multiple outputs (in different resolutions) using the decode
> context in a single call (you can search for “additional_outputs” in va.h).
> 
> VAAPI sample code -
> https://github.com/intel/libva-
> utils/commit/957a269f02b00760b7e807643c821ee26abc529b
> ---
>  fftools/ffmpeg_opt.c | 28 ++++++++++++++++++++++++++++
>  1 file changed, 28 insertions(+)
> 
> diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c index
> 53d688b764..bfb0f882b5 100644
> --- a/fftools/ffmpeg_opt.c
> +++ b/fftools/ffmpeg_opt.c
> @@ -111,6 +111,10 @@ int filter_nbthreads = 0;  int
> filter_complex_nbthreads = 0;  int vstats_version = 2;
> 
> +int sfc_flags = 0;
> +int sfc_width = 0;
> +int sfc_height = 0;
> +char *sfc_format;
> 
>  static int intra_only         = 0;
>  static int file_overwrite     = 0;
> @@ -1100,6 +1104,13 @@ static int open_input_file(OptionsContext *o,
> const char *filename)
>          av_dict_set(&o->g->format_opts, "scan_all_pmts", "1",
> AV_DICT_DONT_OVERWRITE);
>          scan_all_pmts_set = 1;
>      }
> +
> +    //sfc opt
> +    av_dict_set_int(&o->g->codec_opts, "sfc_flags", sfc_flags,
> AV_DICT_DONT_OVERWRITE);
> +    av_dict_set_int(&o->g->codec_opts, "sfc_width", sfc_width,
> AV_DICT_DONT_OVERWRITE);
> +    av_dict_set_int(&o->g->codec_opts, "sfc_height", sfc_height,
> AV_DICT_DONT_OVERWRITE);
> +    av_dict_set(&o->g->codec_opts, "sfc_format", sfc_format,
> + AV_DICT_DONT_OVERWRITE);
> +
>      /* open the input file with generic avformat function */
>      err = avformat_open_input(&ic, filename, file_iformat, &o->g-
> >format_opts);
>      if (err < 0) {
> @@ -2898,6 +2909,13 @@ static int opt_vstats_file(void *optctx, const char
> *opt, const char *arg)
>      return 0;
>  }
> 
> +static int opt_sfc_format(void *optctx, const char *opt, const char
> +*arg) {
> +    av_free (sfc_format);
> +    sfc_format = av_strdup (arg);
> +    return 0;
> +}
> +
>  static int opt_vstats(void *optctx, const char *opt, const char *arg)  {
>      char filename[40];
> @@ -3746,5 +3764,15 @@ const OptionDef options[] = {
>      { "filter_hw_device", HAS_ARG | OPT_EXPERT, { .func_arg =
> opt_filter_hw_device },
>          "set hardware device used when filtering", "device" },
> 
> +    //sfc opt
> +    { "sfc_flags",    OPT_VIDEO | HAS_ARG | OPT_INT | OPT_INPUT,
> { &sfc_flags },
> +      "set sfc flags", "sfc" },
> +    { "sfc_width",    OPT_VIDEO | HAS_ARG | OPT_INT | OPT_INPUT,
> { &sfc_width },
> +      "set sfc width", "sfc" },
> +    { "sfc_height",   OPT_VIDEO | HAS_ARG | OPT_INT | OPT_INPUT,
> { &sfc_height },
> +      "set sfc height", "sfc" },
> +    { "sfc_format",  OPT_VIDEO | HAS_ARG | OPT_EXPERT ,  { .func_arg =
> opt_sfc_format },
> +        "set sfc format", "sfc" },
> +
>      { NULL, },
>  };

Please ignore this patch, new version will be send out soon.
Sorry for inconvenience. 


> --
> 2.17.1