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Check ADTS frame len and UDP frame len match to stop invalid data output #40

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Check ADTS frame len and UDP frame len match to stop invalid data output #40

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11 changes: 9 additions & 2 deletions mpe2aac.c
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Original file line number Diff line number Diff line change
Expand Up @@ -306,8 +306,15 @@ void callback(mpegts_psi_t *psi)
}

/* when aac located successfully */
if (len_udp > 8)
fwrite(payload, 1, len_udp, stdout);
if (len_udp > 8) {
/* get AAC frame length as reported by the ADTS packet itself */
int aac_frame_len = ((payload[3] & 0x3) << 11) | ((payload[4] << 3) | (payload[5] >> 5));

/* Only output AAC frames with matching length in ADTS packet to avoid FFMPEG errors */
if (len_udp == aac_frame_len) {
fwrite(payload, 1, len_udp, stdout);
}
}

}

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