fftools/ffmpeg_opt: Apply copyinkf for all stream types

The earlier code has ignored it for all stream types except
video and subtitles, probably because audio was presumed
to only consist of keyframes. Yet this assumption is not true
for e.g. TrueHD.

Reviewed-by: Jan Ekström <jeebjp@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

fftools/ffmpeg_opt.c

@@ -1611,6 +1611,9 @@ static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, e
     if (!ost->muxing_queue)
         exit_program(1);
 
+    MATCH_PER_STREAM_OPT(copy_initial_nonkeyframes, i,
+                         ost->copy_initial_nonkeyframes, oc, st);
+
     return ost;
 }
 
@@ -1917,8 +1920,6 @@ static OutputStream *new_video_stream(OptionsContext *o, AVFormatContext *oc, in
         ost->last_frame = av_frame_alloc();
         if (!ost->last_frame)
             exit_program(1);
-    } else {
-        MATCH_PER_STREAM_OPT(copy_initial_nonkeyframes, i, ost->copy_initial_nonkeyframes, oc ,st);
     }
 
     if (ost->stream_copy)
@@ -2046,8 +2047,6 @@ static OutputStream *new_subtitle_stream(OptionsContext *o, AVFormatContext *oc,
 
     subtitle_enc->codec_type = AVMEDIA_TYPE_SUBTITLE;
 
-    MATCH_PER_STREAM_OPT(copy_initial_nonkeyframes, i, ost->copy_initial_nonkeyframes, oc, st);
-
     if (!ost->stream_copy) {
         char *frame_size = NULL;