set stream aspect from mov tkhd width/height, patch by Andrew Wason, rectalogic at...

[ffmpeg] / libavformat / utils.c

diff --git a/libavformat/utils.c b/libavformat/utils.c
index fe857905044f6e7ee411e22bf779312c64d0a018..000ab9050e08da0b94d232cfeef30f192456efdf 100644 (file)
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -41,12 +41,12 @@ unsigned avformat_version(void)
     return LIBAVFORMAT_VERSION_INT;
 }
 
-const char * avformat_configuration(void)
+const char *avformat_configuration(void)
 {
     return FFMPEG_CONFIGURATION;
 }
 
-const char * avformat_license(void)
+const char *avformat_license(void)
 {
 #define LICENSE_PREFIX "libavformat license: "
     return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
@@ -2501,6 +2501,11 @@ int av_write_header(AVFormatContext *s)
     AVStream *st;
 
     // some sanity checks
+    if (s->nb_streams == 0) {
+        av_log(s, AV_LOG_ERROR, "no streams\n");
+        return -1;
+    }
+
     for(i=0;i<s->nb_streams;i++) {
         st = s->streams[i];