ffmpeg同时叠加字幕和水印

sugao

1.环境：ubuntu16.04 64位

2.编解码使用nvidia的硬件加速接口

3.使用方式ffmpeg api调用；

4.video_filter_spec定义如下：
char *video_filter_spec = "drawtext=fontfile=FreeSerif.ttf:\
fontsize=36: \
fontcolor=yellow@1.0: \
x='if(gte(t,5), (main_w-mod(t*30,main_w+text_w)), NAN)':\
y=500:\
text='Hello, this is drawtext function,any more questsion can concat su.gao(sugao_cn@163.com)!' [text];  \
movie=/root/mscore/extern/source/logo/test.png [wm]; \
[text] [wm] overlay=0:0 [out]";


使用的filters如下
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1362]        nb_filters:5
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1369]        ----------------------
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1370]        filters:in(buffer)
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1372]        filters outputs:default(0)
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1373]        ----------------------
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1369]        ----------------------
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1370]        filtersut(buffersink)
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1371]        filters inputs:default(0)
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1373]        ----------------------
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1369]        ----------------------
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1370]        filtersarsed_drawtext_0(drawtext)
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1371]        filters inputs:default(0)
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1372]        filters outputs:default(0)
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1373]        ----------------------
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1369]        ----------------------
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1370]        filtersarsed_movie_1(movie)
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1373]        ----------------------
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1369]        ----------------------
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1370]        filtersarsed_overlay_2(overlay)
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1371]        filters inputs:main(0)
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1372]        filters outputs:default(0)
2017-02-08 19:11:26[msffmpeg_opt_set]        [driver/ffmpeg_opt_set.c msffmpeg_api_initvideofilters 1373]        ----------------------


效果图：

孙悟空

多谢支持，给加个精华