libavformat/flvdec.c:813: error: Uninitialized Value
  The value read from flags was never initialized.

libavformat/flvdec.c:813:34: 
811.         sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >>
812.                                 FLV_AUDIO_SAMPLERATE_OFFSET) >> 3;
813.         bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
                                      ^
814.         if (!st->codec->channels || !st->codec->sample_rate ||
815.             !st->codec->bits_per_coded_sample) {
