---
 libavcodec/pcxenc.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/libavcodec/pcxenc.c b/libavcodec/pcxenc.c
index 4bf7377..ae20fb9 100644
--- a/libavcodec/pcxenc.c
+++ b/libavcodec/pcxenc.c
@@ -68,7 +68,7 @@ static int pcx_rle_encode(      uint8_t *dst, int dst_size,
 
     // check worst-case upper bound on dst_size
     if (dst_size < 2LL * src_plane_size * nplanes || src_plane_size <= 0)
-        return -1;
+        return AVERROR_INVALIDDATA;
 
     for (p = 0; p < nplanes; p++) {
         int count = 1;
@@ -112,7 +112,7 @@ static int pcx_encode_frame(AVCodecContext *avctx, AVPacket 
*pkt,
 
     if (avctx->width > 65535 || avctx->height > 65535) {
         av_log(avctx, AV_LOG_ERROR, "image dimensions do not fit in 16 
bits\n");
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
 
     switch (avctx->pix_fmt) {
@@ -136,8 +136,8 @@ static int pcx_encode_frame(AVCodecContext *avctx, AVPacket 
*pkt,
         pal = monoblack_pal;
         break;
     default:
-        av_log(avctx, AV_LOG_ERROR, "unsupported pixfmt\n");
-        return -1;
+        avpriv_request_sample(avctx, "Pixel format %d", avctx->pix_fmt);
+        return AVERROR_PATCHWELCOME;
     }
 
     line_bytes = (avctx->width * bpp + 7) >> 3;
@@ -176,7 +176,7 @@ static int pcx_encode_frame(AVCodecContext *avctx, AVPacket 
*pkt,
         if ((written = pcx_rle_encode(buf, buf_end - buf,
                                       src, line_bytes, nplanes)) < 0) {
             av_log(avctx, AV_LOG_ERROR, "buffer too small\n");
-            return -1;
+            return AVERROR(EINVAL);
         }
         buf += written;
         src += frame->linesize[0];
@@ -185,7 +185,7 @@ static int pcx_encode_frame(AVCodecContext *avctx, AVPacket 
*pkt,
     if (nplanes == 1 && bpp == 8) {
         if (buf_end - buf < 257) {
             av_log(avctx, AV_LOG_ERROR, "buffer too small\n");
-            return -1;
+            return AVERROR(EINVAL);
         }
         bytestream_put_byte(&buf, 12);
         for (i = 0; i < 256; i++) {
-- 
1.9.1

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