Tried that and it at least changed the messages.
[h264 @ 0x7f78d002a7c0] Frame num change from 0 to 1
[h264 @ 0x7f78d002a7c0] decode_slice_header error
[h264 @ 0x7f78d002a7c0] error while decoding MB 15 1, bytestream -20
[h264 @ 0x7f78d002a7c0] concealing 8074 DC, 8074 AC, 8074 MV errors in P frame
[h264 @ 0x7f78d002a7c0] error while decoding MB 39 1, bytestream -6
[h264 @ 0x7f78d002a7c0] concealing 8050 DC, 8050 AC, 8050 MV errors in P frame
[h264 @ 0x7f78d002a7c0] error while decoding MB 19 1, bytestream -12
[h264 @ 0x7f78d002a7c0] concealing 8070 DC, 8070 AC, 8070 MV errors in P frame [h264 @ 0x7f78d002a7c0] error while decoding MB 21 1, bytestream -8
