diff --git a/libavcodec/tta.c b/libavcodec/tta.c
index 17b4ca9032..fed18451eb 100644
--- a/libavcodec/tta.c
+++ b/libavcodec/tta.c
@@ -113,7 +113,7 @@ static int allocate_buffers(AVCodecContext *avctx)
             return AVERROR(ENOMEM);
     } else
         s->decode_buffer = NULL;
-    s->ch_ctx = av_malloc_array(avctx->channels, sizeof(*s->ch_ctx));
+    s->ch_ctx = av_malloc_array(avctx->ch_layout.nb_channels, sizeof(*s->ch_ctx));
     if (!s->ch_ctx) {
         av_freep(&s->decode_buffer);
         return AVERROR(ENOMEM);
@@ -156,9 +156,17 @@ static av_cold int tta_decode_init(AVCodecContext * avctx)
             }
             AV_WL64(s->crc_pass, tta_check_crc64(s->pass));
         }
-        avctx->channels = s->channels = get_bits(&gb, 16);
-        if (s->channels > 1 && s->channels < 9)
-            avctx->channel_layout = tta_channel_layouts[s->channels-2];
+
+        s->channels = get_bits(&gb, 16);
+
+        av_channel_layout_uninit(&avctx->ch_layout);
+        if (s->channels > 1 && s->channels < 9) {
+            av_channel_layout_from_mask(&avctx->ch_layout, tta_channel_layouts[s->channels-2]);
+        } else {
+            avctx->ch_layout.order       = AV_CHANNEL_ORDER_UNSPEC;
+            avctx->ch_layout.nb_channels = s->channels;
+        }
+
         avctx->bits_per_raw_sample = get_bits(&gb, 16);
         s->bps = (avctx->bits_per_raw_sample + 7) / 8;
         avctx->sample_rate = get_bits_long(&gb, 32);
@@ -199,7 +207,7 @@ static av_cold int tta_decode_init(AVCodecContext * avctx)
                        (s->last_frame_length ? 1 : 0);
 
         av_log(avctx, AV_LOG_DEBUG, "format: %d chans: %d bps: %d rate: %d block: %d\n",
-            s->format, avctx->channels, avctx->bits_per_coded_sample, avctx->sample_rate,
+            s->format, avctx->ch_layout.nb_channels, avctx->bits_per_coded_sample, avctx->sample_rate,
             avctx->block_align);
         av_log(avctx, AV_LOG_DEBUG, "data_length: %d frame_length: %d last: %d total: %d\n",
             s->data_length, s->frame_length, s->last_frame_length, total_frames);
diff --git a/libavcodec/ttaenc.c b/libavcodec/ttaenc.c
index addaf30bb5..5717ec22d1 100644
--- a/libavcodec/ttaenc.c
+++ b/libavcodec/ttaenc.c
@@ -56,7 +56,7 @@ static av_cold int tta_encode_init(AVCodecContext *avctx)
     s->bps = avctx->bits_per_raw_sample >> 3;
     avctx->frame_size = 256 * avctx->sample_rate / 245;
 
-    s->ch_ctx = av_malloc_array(avctx->channels, sizeof(*s->ch_ctx));
+    s->ch_ctx = av_malloc_array(avctx->ch_layout.nb_channels, sizeof(*s->ch_ctx));
     if (!s->ch_ctx)
         return AVERROR(ENOMEM);
 
@@ -89,7 +89,7 @@ static int tta_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
     TTAEncContext *s = avctx->priv_data;
     PutBitContext pb;
     int ret, i, out_bytes, cur_chan, res, samples;
-    int64_t pkt_size =  frame->nb_samples * 2LL * avctx->channels * s->bps;
+    int64_t pkt_size =  frame->nb_samples * 2LL * avctx->ch_layout.nb_channels * s->bps;
 
 pkt_alloc:
     cur_chan = 0, res = 0, samples = 0;
@@ -98,13 +98,13 @@ pkt_alloc:
     init_put_bits(&pb, avpkt->data, avpkt->size);
 
     // init per channel states
-    for (i = 0; i < avctx->channels; i++) {
+    for (i = 0; i < avctx->ch_layout.nb_channels; i++) {
         s->ch_ctx[i].predictor = 0;
         ff_tta_filter_init(&s->ch_ctx[i].filter, ff_tta_filter_configs[s->bps - 1]);
         ff_tta_rice_init(&s->ch_ctx[i].rice, 10, 10);
     }
 
-    for (i = 0; i < frame->nb_samples * avctx->channels; i++) {
+    for (i = 0; i < frame->nb_samples * avctx->ch_layout.nb_channels; i++) {
         TTAChannel *c = &s->ch_ctx[cur_chan];
         TTAFilter *filter = &c->filter;
         TTARice *rice = &c->rice;
@@ -113,8 +113,8 @@ pkt_alloc:
 
         value = get_sample(frame, samples++, avctx->sample_fmt);
 
-        if (avctx->channels > 1) {
-            if (cur_chan < avctx->channels - 1)
+        if (avctx->ch_layout.nb_channels > 1) {
+            if (cur_chan < avctx->ch_layout.nb_channels - 1)
                 value  = res = get_sample(frame, samples, avctx->sample_fmt) - value;
             else
                 value -= res / 2;
@@ -176,7 +176,7 @@ pkt_alloc:
         if (k)
             put_bits(&pb, k, outval & (ff_tta_shift_1[k] - 1));
 
-        if (cur_chan < avctx->channels - 1)
+        if (cur_chan < avctx->ch_layout.nb_channels - 1)
             cur_chan++;
         else
             cur_chan = 0;
