diff --git a/libavformat/rmenc.c b/libavformat/rmenc.c
index a96c429..93e2772 100644
--- a/libavformat/rmenc.c
+++ b/libavformat/rmenc.c
@@ -221,6 +221,7 @@ static int rv10_write_header(AVFormatContext *ctx,
             avio_wb32(s, stream->enc->bit_rate / 8 * 60); /* bytes per minute */
             avio_wb16(s, 0x01);
             /* frame length : seems to be very important */
+            av_log(ctx, AV_LOG_ERROR, "coded_frame_size: %d\n", coded_frame_size);
             avio_wb16(s, coded_frame_size);
             avio_wb32(s, 0); /* unknown */
             avio_wb16(s, stream->enc->sample_rate); /* sample rate */