Add FourCC V264 for H264 in CCTV recordings.

libavformat/riff.c

@@ -42,6 +42,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
     { AV_CODEC_ID_H264,         MKTAG('S', 'M', 'V', '2') },
     { AV_CODEC_ID_H264,         MKTAG('V', 'S', 'S', 'H') },
     { AV_CODEC_ID_H264,         MKTAG('Q', '2', '6', '4') }, /* QNAP surveillance system */
+    { AV_CODEC_ID_H264,         MKTAG('V', '2', '6', '4') },
     { AV_CODEC_ID_H263,         MKTAG('H', '2', '6', '3') },
     { AV_CODEC_ID_H263,         MKTAG('X', '2', '6', '3') },
     { AV_CODEC_ID_H263,         MKTAG('T', '2', '6', '3') },