--- a/src/decoder/FfmpegDecoderPlugin.cxx
+++ b/src/decoder/FfmpegDecoderPlugin.cxx
@@ -376,6 +376,13 @@ ffmpeg_probe(Decoder *decoder, InputStre
 
 	unsigned char buffer[BUFFER_SIZE];
 	size_t nbytes = decoder_read(decoder, is, buffer, BUFFER_SIZE);
+
+	if ((nbytes > 0) && (nbytes < 1024))
+	{
+		// Gobble some more data if header is small
+		nbytes += decoder_read(decoder, is, buffer + nbytes, BUFFER_SIZE - nbytes);
+	}
+
 	if (nbytes <= PADDING || !is.LockRewind(IgnoreError()))
 		return nullptr;