diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
index 516f1c972b9cb2b36d4f0bbc06a19d2a67b8340d..dea72e5d73194ecf1323db81462041ae422506ba 100644
--- a/libavcodec/avpacket.c
+++ b/libavcodec/avpacket.c
@@ -41,8 +41,6 @@ void av_destruct_packet(AVPacket *pkt)
     av_free(pkt->data);
     pkt->data = NULL;
     pkt->size = 0;
-
-    ff_packet_free_side_data(pkt);
 }
 
 void av_init_packet(AVPacket *pkt)
@@ -174,11 +172,16 @@ int av_copy_packet(AVPacket *dst, AVPacket *src)
 void av_free_packet(AVPacket *pkt)
 {
     if (pkt) {
+        int i;
+
         if (pkt->destruct)
             pkt->destruct(pkt);
         pkt->data            = NULL;
         pkt->size            = 0;
-        pkt->side_data       = NULL;
+
+        for (i = 0; i < pkt->side_data_elems; i++)
+            av_free(pkt->side_data[i].data);
+        av_freep(&pkt->side_data);
         pkt->side_data_elems = 0;
     }
 }
diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index 5e12575e004edc307d9d14ff74f7c887eeb337d9..c82a9084d08307653f4ca7cda026037e9ec64cfe 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -498,8 +498,8 @@ static int init_convert_timestamp(AVFormatContext *ctx, int64_t ts)
     now = av_gettime_monotonic();
     if (s->ts_mode == V4L_TS_MONO2ABS ||
         (ts <= now + 1 * AV_TIME_BASE && ts >= now - 10 * AV_TIME_BASE)) {
-        int64_t period = av_rescale_q(1, ctx->streams[0]->codec->time_base,
-                                      AV_TIME_BASE_Q);
+        int64_t period = av_rescale_q(1, AV_TIME_BASE_Q,
+                                      ctx->streams[0]->avg_frame_rate);
         av_log(ctx, AV_LOG_INFO, "Detected monotonic timestamps, converting\n");
         /* microseconds instead of seconds, MHz instead of Hz */
         s->timefilter = ff_timefilter_new(1, period, 1.0E-6);
@@ -554,7 +554,11 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
 
         return AVERROR(errno);
     }
-    av_assert0(buf.index < s->buffers);
+
+    if (buf.index >= s->buffers) {
+        av_log(ctx, AV_LOG_ERROR, "Invalid buffer index received.\n");
+        return AVERROR(EINVAL);
+    }
 
     /* CPIA is a compressed format and we don't know the exact number of bytes
      * used by a frame, so set it here as the driver announces it.
@@ -735,8 +739,8 @@ static int v4l2_set_parameters(AVFormatContext *s1)
             return AVERROR(errno);
         }
     }
-    s1->streams[0]->codec->time_base.den = tpf->denominator;
-    s1->streams[0]->codec->time_base.num = tpf->numerator;
+    s1->streams[0]->avg_frame_rate.num = tpf->denominator;
+    s1->streams[0]->avg_frame_rate.den = tpf->numerator;
 
     return 0;
 }
@@ -878,7 +882,7 @@ static int v4l2_read_header(AVFormatContext *s1)
         st->codec->codec_tag = MKTAG('Y', 'V', '1', '2');
     st->codec->width = s->width;
     st->codec->height = s->height;
-    st->codec->bit_rate = s->frame_size * 1/av_q2d(st->codec->time_base) * 8;
+    st->codec->bit_rate = s->frame_size * av_q2d(st->avg_frame_rate) * 8;
 
     return 0;
 }