[FFmpeg-cvslog] avfilter/vf_format: check that the format list is not empty

[Michael Niedermayer]

ffmpeg | branch: release/2.1 | Michael Niedermayer <michaelni at gmx.at> | Sun Jan  5 20:14:03 2014 +0100| [edc6f3da0ed58ae3202fea9ba927fd6d4a22c997] | committer: Carl Eugen Hoyos

avfilter/vf_format: check that the format list is not empty

Fixes Ticket3210

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit ee16e0cacc16ea60c35a66796410012755263c3c)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=edc6f3da0ed58ae3202fea9ba927fd6d4a22c997
---

 libavfilter/vf_format.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavfilter/vf_format.c b/libavfilter/vf_format.c
index 1813a2c..a9e386f 100644
--- a/libavfilter/vf_format.c
+++ b/libavfilter/vf_format.c
@@ -55,6 +55,9 @@ static av_cold int init(AVFilterContext *ctx)
     int              pix_fmt_name_len, ret;
     enum AVPixelFormat pix_fmt;
 
+    if (!s->pix_fmts)
+        return AVERROR(EINVAL);
+
     /* parse the list of formats */
     for (cur = s->pix_fmts; cur; cur = sep ? sep + 1 : NULL) {
         if (!(sep = strchr(cur, '|')))