=22354== Invalid write of size 8
==22354==    at 0x4B87DE: nut_write_header (nutenc.c:613)
==22354==    by 0x4ED96A: avformat_write_header (utils.c:2917)
==22354==    by 0x4DAE1D: seg_write_packet (segment.c:58)
==22354==    by 0x4EE4A2: av_interleaved_write_frame (utils.c:3162)
==22354==    by 0x4337C4: write_frame (avconv.c:711)
==22354==    by 0x433F50: output_packet (avconv.c:1852)
==22354==    by 0x43ABFE: main (avconv.c:2460)
==22354==  Address 0x65efa70 is 0 bytes after a block of size 16 alloc'd
==22354==    at 0x4C27168: memalign (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==22354==    by 0x4C27217: posix_memalign (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==22354==    by 0x948E51: av_mallocz (mem.c:83)
==22354==    by 0x4B86D0: nut_write_header (nutenc.c:591)
==22354==    by 0x4ED96A: avformat_write_header (utils.c:2917)
==22354==    by 0x4DAE1D: seg_write_packet (segment.c:58)
==22354==    by 0x4EE4A2: av_interleaved_write_frame (utils.c:3162)
==22354==    by 0x4337C4: write_frame (avconv.c:711)
==22354==    by 0x433F50: output_packet (avconv.c:1852)
==22354==    by 0x43ABFE: main (avconv.c:2460)