From: Jun Zhao <barryjz...@tencent.com>
fix crash when used the command like:
- ffmpeg -h protocol
- ffmpeg -h protocol=
Signed-off-by: Jun Zhao <barryjz...@tencent.com>
---
fftools/cmdutils.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c
index 2284631..f0f2b4f 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;
--
1.7.1
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