This fixes the warning:
libavcodec/aacenc.c:524: warning: passing argument 2 of ‘deinterleave_input_samples’ discards qualifiers from pointer target type
* Deinterleave input samples.
* Channels are reordered from Libav's default order to AAC order.
*/
-static void deinterleave_input_samples(AACEncContext *s, AVFrame *frame)
+static void deinterleave_input_samples(AACEncContext *s, const AVFrame *frame)
{
int ch, i;
const int sinc = s->channels;