[FFmpeg-cvslog] ffmpeg_opt: Print a warning if more than one -vf/-af option was specified.

[Carl Eugen Hoyos]

ffmpeg | branch: master | Carl Eugen Hoyos <ceffmpeg at gmail.com> | Mon Jan 14 13:34:22 2019 +0100| [301cee61fa61c55b1c178ebfbc590872e8b033e6] | committer: Carl Eugen Hoyos

ffmpeg_opt: Print a warning if more than one -vf/-af option was specified.

Fixes ticket #4184.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=301cee61fa61c55b1c178ebfbc590872e8b033e6
---

 fftools/ffmpeg_opt.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index a99e762dc6..53d688b764 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -1681,6 +1681,8 @@ static OutputStream *new_video_stream(OptionsContext *o, AVFormatContext *oc, in
 
     MATCH_PER_STREAM_OPT(filter_scripts, str, ost->filters_script, oc, st);
     MATCH_PER_STREAM_OPT(filters,        str, ost->filters,        oc, st);
+    if (o->nb_filters > 1)
+        av_log(NULL, AV_LOG_ERROR, "Only '-vf %s' read, ignoring remaining -vf options: Use ',' to separate filters\n", ost->filters);
 
     if (!ost->stream_copy) {
         const char *p = NULL;
@@ -1862,6 +1864,8 @@ static OutputStream *new_audio_stream(OptionsContext *o, AVFormatContext *oc, in
 
     MATCH_PER_STREAM_OPT(filter_scripts, str, ost->filters_script, oc, st);
     MATCH_PER_STREAM_OPT(filters,        str, ost->filters,        oc, st);
+    if (o->nb_filters > 1)
+        av_log(NULL, AV_LOG_ERROR, "Only '-af %s' read, ignoring remaining -af options: Use ',' to separate filters\n", ost->filters);
 
     if (!ost->stream_copy) {
         char *sample_fmt = NULL;