Merge commit '39c2880e'

* commit '39c2880e':
  af_volume: preserve frame properties

Conflicts:
	libavfilter/af_volume.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavfilter/af_volume.c

@@ -325,6 +325,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
     int nb_samples        = buf->nb_samples;
     AVFrame *out_buf;
     int64_t pos;
+    int ret;
 
     if (isnan(vol->var_values[VAR_STARTPTS])) {
         vol->var_values[VAR_STARTPTS] = TS2D(buf->pts);
@@ -351,7 +352,12 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
         out_buf = ff_get_audio_buffer(inlink, nb_samples);
         if (!out_buf)
             return AVERROR(ENOMEM);
-        av_frame_copy_props(out_buf, buf);
+        ret = av_frame_copy_props(out_buf, buf);
+        if (ret < 0) {
+            av_frame_free(&out_buf);
+            av_frame_free(&buf);
+            return ret;
+        }
     }
 
     if (vol->precision != PRECISION_FIXED || vol->volume_i > 0) {