diff --git a/libavcodec/pnm.c b/libavcodec/pnm.c
index 3fa4d7c95b..63b77cd807 100644
--- a/libavcodec/pnm.c
+++ b/libavcodec/pnm.c
@@ -118,10 +118,8 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
                 avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
             } else if (maxval < 256) {
                 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
-            } else if (maxval < 65535) {
-                avctx->pix_fmt = AV_PIX_FMT_GRAY16;
             } else {
-                avctx->pix_fmt = AV_PIX_FMT_GRAY16BE;
+                avctx->pix_fmt = AV_PIX_FMT_GRAY16;
             }
         } else if (depth == 2) {
             if (maxval == 255)
@@ -130,13 +128,13 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
             if (maxval < 256) {
                 avctx->pix_fmt = AV_PIX_FMT_RGB24;
             } else {
-                avctx->pix_fmt = AV_PIX_FMT_RGB48BE;
+                avctx->pix_fmt = AV_PIX_FMT_RGB48;
             }
         } else if (depth == 4) {
             if (maxval < 256) {
                 avctx->pix_fmt = AV_PIX_FMT_RGBA;
             } else {
-                avctx->pix_fmt = AV_PIX_FMT_RGBA64BE;
+                avctx->pix_fmt = AV_PIX_FMT_RGBA64;
             }
         } else {
             return AVERROR_INVALIDDATA;
@@ -164,16 +162,14 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
         }
         if (s->maxval >= 256) {
             if (avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
-                avctx->pix_fmt = AV_PIX_FMT_GRAY16BE;
-                if (s->maxval != 65535)
-                    avctx->pix_fmt = AV_PIX_FMT_GRAY16;
+                avctx->pix_fmt = AV_PIX_FMT_GRAY16;
             } else if (avctx->pix_fmt == AV_PIX_FMT_RGB24) {
-                avctx->pix_fmt = AV_PIX_FMT_RGB48BE;
+                avctx->pix_fmt = AV_PIX_FMT_RGB48;
             } else if (avctx->pix_fmt == AV_PIX_FMT_YUV420P && s->maxval < 65536) {
                 if (s->maxval < 512)
-                    avctx->pix_fmt = AV_PIX_FMT_YUV420P9BE;
+                    avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
                 else if (s->maxval < 1024)
-                    avctx->pix_fmt = AV_PIX_FMT_YUV420P10BE;
+                    avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
                 else
                     avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
             } else {
diff --git a/libavcodec/pnmdec.c b/libavcodec/pnmdec.c
index d0c72954aa..a7b91fd509 100644
--- a/libavcodec/pnmdec.c
+++ b/libavcodec/pnmdec.c
@@ -24,6 +24,17 @@
 #include "put_bits.h"
 #include "pnm.h"
 
+static void samplecpy(void *dst, const void *src, int n, int maxval)
+{
+    if (maxval <= 255) {
+        memcpy(dst, src, n);
+    } else {
+        int i;
+        for (i=0; i<n/2; i++) {
+            ((uint16_t *)dst)[i] = av_be2ne16(((uint16_t *)src)[i]);
+        }
+    }
+}
 
 static int pnm_decode_frame(AVCodecContext *avctx, void *data,
                             int *got_frame, AVPacket *avpkt)
@@ -51,12 +62,12 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
     switch (avctx->pix_fmt) {
     default:
         return AVERROR(EINVAL);
-    case AV_PIX_FMT_RGBA64BE:
+    case AV_PIX_FMT_RGBA64:
         n = avctx->width * 8;
         components=4;
         sample_len=16;
         goto do_read;
-    case AV_PIX_FMT_RGB48BE:
+    case AV_PIX_FMT_RGB48:
         n = avctx->width * 6;
         components=3;
         sample_len=16;
@@ -83,8 +94,7 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
         components=2;
         sample_len=8;
         goto do_read;
-    case AV_PIX_FMT_GRAY16BE:
-    case AV_PIX_FMT_GRAY16LE:
+    case AV_PIX_FMT_GRAY16:
         n = avctx->width * 2;
         components=1;
         sample_len=16;
@@ -124,15 +134,19 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
                             c = (*s->bytestream++) - '0';
                         } while (c <= 9);
                     }
-                    put_bits(&pb, sample_len, (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval);
+                    if (sample_len == 16) {
+                        ((uint16_t*)ptr)[j] = (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval;
+                    } else
+                        put_bits(&pb, sample_len, (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval);
                 }
-                flush_put_bits(&pb);
+                if (sample_len != 16)
+                    flush_put_bits(&pb);
                 ptr+= linesize;
             }
         }else{
         for (i = 0; i < avctx->height; i++) {
             if (!upgrade)
-                memcpy(ptr, s->bytestream, n);
+                samplecpy(ptr, s->bytestream, n, s->maxval);
             else if (upgrade == 1) {
                 unsigned int j, f = (255 * 128 + s->maxval / 2) / s->maxval;
                 for (j = 0; j < n; j++)
@@ -150,8 +164,8 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
         }
         break;
     case AV_PIX_FMT_YUV420P:
-    case AV_PIX_FMT_YUV420P9BE:
-    case AV_PIX_FMT_YUV420P10BE:
+    case AV_PIX_FMT_YUV420P9:
+    case AV_PIX_FMT_YUV420P10:
         {
             unsigned char *ptr1, *ptr2;
 
@@ -163,7 +177,7 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
             if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end)
                 return AVERROR_INVALIDDATA;
             for (i = 0; i < avctx->height; i++) {
-                memcpy(ptr, s->bytestream, n);
+                samplecpy(ptr, s->bytestream, n, s->maxval);
                 s->bytestream += n;
                 ptr           += linesize;
             }
@@ -172,9 +186,9 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
             n >>= 1;
             h = avctx->height >> 1;
             for (i = 0; i < h; i++) {
-                memcpy(ptr1, s->bytestream, n);
+                samplecpy(ptr1, s->bytestream, n, s->maxval);
                 s->bytestream += n;
-                memcpy(ptr2, s->bytestream, n);
+                samplecpy(ptr2, s->bytestream, n, s->maxval);
                 s->bytestream += n;
                 ptr1 += p->linesize[1];
                 ptr2 += p->linesize[2];
diff --git a/tests/lavf-regression.sh b/tests/lavf-regression.sh
index 4d5c7dca5c..cd96567325 100755
--- a/tests/lavf-regression.sh
+++ b/tests/lavf-regression.sh
@@ -235,8 +235,8 @@ if [ -n "$do_pam" ] ; then
 do_image_formats pam
 do_image_formats pam "-pix_fmt rgba"
 do_image_formats pam "-pix_fmt gray"
-do_image_formats pam "-pix_fmt gray16be"
-do_image_formats pam "-pix_fmt rgb48be"
+do_image_formats pam "-pix_fmt gray16be" "-pix_fmt gray16be"
+do_image_formats pam "-pix_fmt rgb48be" "-pix_fmt rgb48be"
 do_image_formats pam "-pix_fmt monob"
 fi