The file contains a NAL-H264 that has the following configuration (SPS + 1 PPS) 0x01 0xa0 0x50 0x7c 0xff 0xe1 0x00 0x09 0x27 0x42 0x80 0x0d 0x95 0xa0 0x50 0x7c 0x40 0x01 0x00 0x04 0x28 0xce 0x0d 0x88 The problems are: Starting playback... [h264 @ 0x85eb568]is_avc in decode_frame, sps, nalsize=11 [h264 @ 0x85eb568]decode_nal_units, is_avc, nalsize=9 [h264 @ 0x85eb568]DECODE_SPS [h264 @ 0x85eb568]width: 20, height: 15 (320 x 240) [h264 @ 0x85eb568]has vui ? 0 [h264 @ 0x85eb568]is_avc in decode_frame, pps, nalsize=6 [h264 @ 0x85eb568]decode_nal_units, is_avc, nalsize=4 [h264 @ 0x85eb568]DECODE_PPS [h264 @ 0x85eb568]is_avc nal_length_size= 4 [h264 @ 0x85eb568]decode_nal_units, is_avc, nalsize=1279 [h264 @ 0x85eb568]AVC: Consumed only 1274 bytes instead of 1279 mplayer: h264.c:2290: mc_dir_part: Assertion `pic->data[0]' failed.