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author | Jun Zhao <barryjzhao@tencent.com> | 2020-01-30 22:03:17 +0800 |
---|---|---|
committer | James Almer <jamrial@gmail.com> | 2020-01-30 12:50:22 -0300 |
commit | b99ed6e4287ccc4dcaf3c5133e9ec62d4ddb5bc6 (patch) | |
tree | 1444868ec14e92e7f4fac13558fa3dbde7dd85a6 /fftools | |
parent | 863accbefa2b433adbdfe189438adb11abc276c6 (diff) |
cmdutils: fix crash if no name for "ffmpeg -h protocol"
fix crash when used the command like:
- ffmpeg -h protocol
- ffmpeg -h protocol=
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
Diffstat (limited to 'fftools')
-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; |