-diff -urN a/libavfilter/af_aformat.c b/libavfilter/af_aformat.c
---- a/libavfilter/af_aformat.c 2019-12-02 08:48:03.060361273 -0700
-+++ b/libavfilter/af_aformat.c 2019-12-02 08:52:25.619248884 -0700
-@@ -109,6 +109,16 @@
- return 0;
- }
-
-+#define DEL_FIELD(p,mem,fld) if( p->mem ) { av_freep(&p->mem->fld); av_freep(&p->mem); }
-+
-+static av_cold void uninit(AVFilterContext *ctx)
-+{
-+ AFormatContext *s = ctx->priv;
-+ DEL_FIELD(s, formats, formats);
-+ DEL_FIELD(s, sample_rates, formats);
-+ DEL_FIELD(s, channel_layouts, channel_layouts);
-+}
-+
- static int query_formats(AVFilterContext *ctx)
- {
- AFormatContext *s = ctx->priv;
-@@ -146,6 +156,7 @@
- .name = "aformat",
- .description = NULL_IF_CONFIG_SMALL("Convert the input audio to one of the specified formats."),
- .init = init,
-+ .uninit = uninit,
- .query_formats = query_formats,
- .priv_size = sizeof(AFormatContext),
- .priv_class = &aformat_class,
+--- a/libavformat/avidec.c
++++ b/libavformat/avidec.c
+@@ -1995,6 +1995,7 @@
+ .priv_data_size = sizeof(AVIContext),
+ .flags_internal = FF_FMT_INIT_CLEANUP,
+ .extensions = "avi",
++ .flags = AVFMT_SEEK_NOSTREAMS,
+ .read_probe = avi_probe,
+ .read_header = avi_read_header,
+ .read_packet = avi_read_packet,