video4linux2: Avoid a floating point exception

This avoids a segfault in avconv_opt.c:opt_target when trying to determine the norm.
11 years ago · dc71f19588
parent e76f2d1197
commit dc71f19588
1 changed files with 2 additions and 1 deletions
--- a/avconv_opt.c
+++ b/avconv_opt.c
@ -1757,7 +1757,8 @@ static int opt_target(void *optctx, const char *opt, const char *arg)
            for (j = 0; j < nb_input_files; j++) {
                for (i = 0; i < input_files[j]->nb_streams; i++) {
                    AVCodecContext *c = input_files[j]->ctx->streams[i]->codec;
-                    if (c->codec_type != AVMEDIA_TYPE_VIDEO)
+                    if (c->codec_type != AVMEDIA_TYPE_VIDEO ||
+                        !c->time_base.num)
                        continue;
                    fr = c->time_base.den * 1000 / c->time_base.num;
                    if (fr == 25000) {