ffmpeg同时添加字幕和水印

[酷咪哥]

1.添加字幕
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=(0):\
text='Hello, this is drawtext function,any more questsion can concat su.gao\([e-mail]\)' ";

2.添加水印
char *video_filter_spec ="movie=/root/mscore/extern/source/logo/dexin_ch.png[wm];[in] [wm]overlay='if(gte(t,5), (W-mod(t*30,W)), NAN)':0 [out]";

3.同时添加字幕和水印
char *video_filter_spec = "drawtext=x=0:y=main_h:text='Hello!';movie=/root/mscore/extern/source/logo/dexin_ch.png[wm];[in] [wm]overlay=0:0 [out] ";

解析函数
if ( avfilter_graph_parse_ptr(graph, video_filter_spec,&inputs, &outputs, NULL) < 0){
ms_errgoto( endfiter, "avgraph_parse_ptr failed");
}

video_filter_spec定义1和2可以正常使用，但3会报错误：Invalid filterchain containing an unlabelled output pad: "drawtext=x=0:y=main_h:text='Hello!';movie=/root/mscore/extern/source/logo/dexin_ch.png[wm];[in] [wm]overlay=0:0 [out] "

请问我要同时实现添加字幕和水印，应该如何定义video_filter_spec？？？？？

[广州小程]

again 如果水印跟字幕分开可以，那可以分开加上去吧。

[酷咪哥]

问题已经解决，解决方法见 http://blog.csdn.net/weixin_35804181/article/details/54931647