docu: add flite ffmpeg example

[ffmpeg] / ffmpeg_filter.c

diff --git a/ffmpeg_filter.c b/ffmpeg_filter.c
index eb09b778b60f017edf6428554f9cd6876ebdf779..d0f25d82ad64fa11ed0ec4df2d81574822d7e12a 100644 (file)
--- a/ffmpeg_filter.c
+++ b/ffmpeg_filter.c
@@ -129,10 +129,8 @@ static char *choose_pix_fmts(OutputStream *ost)
         return NULL;
 }
 
-/**
- * Define a function for building a string containing a list of
- * allowed formats,
- */
+/* Define a function for building a string containing a list of
+ * allowed formats. */
 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator)\
 static char *choose_ ## var ## s(OutputStream *ost)                            \
 {                                                                              \
@@ -560,6 +558,13 @@ static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
     int pad_idx = in->pad_idx;
     int ret;
 
+    if (!ist->framerate.num) {
+        AVRational codec_fr = av_inv_q(ist->st->codec->time_base);
+        codec_fr.den *= ist->st->codec->ticks_per_frame;
+        if(av_q2d(codec_fr) < av_q2d(fr)*0.7)
+            fr = codec_fr;
+    }
+
     if (ist->st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
         ret = sub2video_prepare(ist);
         if (ret < 0)