Linjie Fu (12021-08-03):
> From: Linjie Fu <linjie.justin...@gmail.com>
>
> Currently the default swscale flags for simple filter graph is bicubic,
> however for complex filter graph it uses bilinear as decleared in scale
> filter.
>
> $ffmpeg -v verbose -i input.mp4 -vf format=yuv420p,scale=800x600 -an -f null -
> [Parsed_scale_1 @ 0x7f86d2c160c0] w:1920 h:1080 fmt:yuv420p sar:0/1 -> w:800
> h:600 fmt:yuv420p sar:0/1 flags:0x4
>
> $ffmpeg -v verbose -i input.mp4 -filter_complex format=yuv420p,scale=800x600
> -an -f null -
> [Parsed_scale_1 @ 0x7f8779e046c0] w:1920 h:1080 fmt:yuv420p sar:0/1 -> w:800
> h:600 fmt:yuv420p sar:0/1 flags:0x2
>
> Set the default flags for scale filter to "bicubic" to match the behaviour in
> swscale.
> And remove setting defaults in ffmpeg/ffprobe/ffplay.
>
> Signed-off-by: Linjie Fu <linjie.justin...@gmail.com>
> ---
> fftools/cmdutils.c | 8 --------
> fftools/ffplay.c | 2 --
> fftools/ffprobe.c | 1 -
> libavfilter/vf_scale.c | 2 +-
> 4 files changed, 1 insertion(+), 12 deletions(-)
>
> diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c
> index 0b1ef03a25..912e881174 100644
> --- a/fftools/cmdutils.c
> +++ b/fftools/cmdutils.c
> @@ -81,11 +81,6 @@ enum show_muxdemuxers {
> SHOW_MUXERS,
> };
>
> -void init_opts(void)
> -{
> - av_dict_set(&sws_dict, "flags", "bicubic", 0);
> -}
> -
> void uninit_opts(void)
> {
> av_dict_free(&swr_opts);
> @@ -670,7 +665,6 @@ static void finish_group(OptionParseContext *octx, int
> group_idx,
> resample_opts = NULL;
> sws_dict = NULL;
> swr_opts = NULL;
> - init_opts();
>
> memset(&octx->cur_group, 0, sizeof(octx->cur_group));
> }
> @@ -708,8 +702,6 @@ static void init_parse_context(OptionParseContext *octx,
>
> octx->global_opts.group_def = &global_group;
> octx->global_opts.arg = "";
> -
> - init_opts();
> }
>
> void uninit_parse_context(OptionParseContext *octx)
> diff --git a/fftools/ffplay.c b/fftools/ffplay.c
> index 6b19574eae..46758b9f55 100644
> --- a/fftools/ffplay.c
> +++ b/fftools/ffplay.c
> @@ -3695,8 +3695,6 @@ int main(int argc, char **argv)
> #endif
> avformat_network_init();
>
> - init_opts();
> -
> signal(SIGINT , sigterm_handler); /* Interrupt (ANSI). */
> signal(SIGTERM, sigterm_handler); /* Termination (ANSI). */
>
> diff --git a/fftools/ffprobe.c b/fftools/ffprobe.c
> index f411ba35b5..95263e1e6f 100644
> --- a/fftools/ffprobe.c
> +++ b/fftools/ffprobe.c
> @@ -3721,7 +3721,6 @@ int main(int argc, char **argv)
> options = real_options;
> parse_loglevel(argc, argv, options);
> avformat_network_init();
> - init_opts();
> #if CONFIG_AVDEVICE
> avdevice_register_all();
> #endif
> diff --git a/libavfilter/vf_scale.c b/libavfilter/vf_scale.c
> index f07e01bf90..3029ab4b68 100644
> --- a/libavfilter/vf_scale.c
> +++ b/libavfilter/vf_scale.c
> @@ -900,7 +900,7 @@ static const AVOption scale_options[] = {
> { "width", "Output video width", OFFSET(w_expr),
> AV_OPT_TYPE_STRING, .flags = TFLAGS },
> { "h", "Output video height", OFFSET(h_expr),
> AV_OPT_TYPE_STRING, .flags = TFLAGS },
> { "height","Output video height", OFFSET(h_expr),
> AV_OPT_TYPE_STRING, .flags = TFLAGS },
> - { "flags", "Flags to pass to libswscale", OFFSET(flags_str),
> AV_OPT_TYPE_STRING, { .str = "bilinear" }, .flags = FLAGS },
> + { "flags", "Flags to pass to libswscale", OFFSET(flags_str),
> AV_OPT_TYPE_STRING, { .str = "bicubic" }, .flags = FLAGS },
This is wrong: still overriding swscale's default.
> { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL,
> {.i64 = 0 }, -1, 1, FLAGS },
> { "size", "set video size", OFFSET(size_str),
> AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
> { "s", "set video size", OFFSET(size_str),
> AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
Regards,
--
Nicolas George
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