ffmpeg | branch: master | Gyan Doshi <ffm...@gyani.pro> | Fri Jun 22 22:20:16 
2018 +0530| [4ac88ba5487e026bf81da565f97cfcf8f920657d] | committer: Gyan Doshi

fftools/ffmpeg: check sseof value and clash with ss

Prioritize -ss

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4ac88ba5487e026bf81da565f97cfcf8f920657d
---

 fftools/ffmpeg_opt.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index a2ecddae71..58ec13e5a8 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -1103,9 +1103,22 @@ static int open_input_file(OptionsContext *o, const char 
*filename)
         }
     }
 
+    if (o->start_time != AV_NOPTS_VALUE && o->start_time_eof != 
AV_NOPTS_VALUE) {
+        av_log(NULL, AV_LOG_WARNING, "Cannot use -ss and -sseof both, using 
-ss for %s\n", filename);
+        o->start_time_eof = AV_NOPTS_VALUE;
+    }
+
     if (o->start_time_eof != AV_NOPTS_VALUE) {
-        if (ic->duration>0) {
+        if (o->start_time_eof >= 0) {
+            av_log(NULL, AV_LOG_ERROR, "-sseof value must be negative; 
aborting\n");
+            exit_program(1);
+        }
+        if (ic->duration > 0) {
             o->start_time = o->start_time_eof + ic->duration;
+            if (o->start_time < 0) {
+                av_log(NULL, AV_LOG_WARNING, "-sseof value seeks to before 
start of file %s; ignored\n", filename);
+                o->start_time = AV_NOPTS_VALUE;
+            }
         } else
             av_log(NULL, AV_LOG_WARNING, "Cannot use -sseof, duration of %s 
not known\n", filename);
     }

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