diff options
| -rw-r--r-- | fftools/cmdutils.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c index 22846317c1..f0f2b4fde4 100644 --- a/fftools/cmdutils.c +++ b/fftools/cmdutils.c @@ -1872,8 +1872,14 @@ static void show_help_demuxer(const char *name) static void show_help_protocol(const char *name) { - const AVClass *proto_class = avio_protocol_get_class(name); + const AVClass *proto_class; + if (!name) { + av_log(NULL, AV_LOG_ERROR, "No protocol name specified.\n"); + return; + } + + proto_class = avio_protocol_get_class(name); if (!proto_class) { av_log(NULL, AV_LOG_ERROR, "Unknown protocol '%s'.\n", name); return; |