[FFmpeg-devel] [PATCH] added expr evaluation to drawtext - fontsize

[Brett Harrison]

Pinging for comments / review...

On Tue, Apr 4, 2017 at 3:45 PM, Brett Harrison <brett.harrison at zyamusic.com>
wrote:

> Resurrecting this patch.
>
> On Thu, Sep 15, 2016 at 3:20 AM, Michael Niedermayer <
> michael at niedermayer.cc> wrote:
>
>> On Fri, Sep 09, 2016 at 05:26:03PM -0700, Brett Harrison wrote:
>> > Here are the changes requested
>> [...]
>> > +static av_cold int parse_fontsize(AVFilterContext *ctx)
>> > +{
>> > +    DrawTextContext *s = ctx->priv;
>> > +    int err;
>> > +
>> > +    if (s->fontsize_expr == NULL)
>> > +        return AVERROR(EINVAL);
>> > +
>> > +    av_expr_free(s->fontsize_pexpr);
>> > +    s->fontsize_pexpr = NULL;
>> > +
>> > +    if ((err = av_expr_parse(&s->fontsize_pexpr, s->fontsize_expr,
>> var_names,
>> > +                             NULL, NULL, fun2_names, fun2, 0, ctx)) <
>> 0)
>> > +        return err;
>> > +
>> > +    return 0;
>> > +}
>>
>> why is av_expr_parse() not executed where the other av_expr_parse()
>> are ?
>>
>
> I needed to perform av_expr_parse() during init() to resolve the default
> fontsize.  init() is called before config_input() where the other
> av_expr_parse() calls are.
>
>
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