[FFmpeg-devel] [PATCH] Add four metadata tags to 3gp files

[John Kelley]

> # FFMpeg generated tags (mp4dump)
>
>  type udta
>   type titl
>    data = <24 bytes>
>    00 00 00 00 15 c7 00 4d 00 59 00 20 00 54 00 49
>    00 54 00 4c 00 45 00 00
>   type auth
>    data = <20 bytes>
>    00 00 00 00 15 c7 00 4d 00 45 00 20 00 53 00 41
>    00 4e 00 00
>   type dscp
>    data = <20 bytes>
>    00 00 00 00 15 c7 65 e5 67 2c 8a 9e 30 c6 30 b9
>    30 c8 00 00
>   type cprt
>    type ?
>     data = <24 bytes>
>     00 59 00 20 00 43 00 4f 00 50 00 59 00 52 00 49
>     00 47 00 48 00 54 00 00
>   type yrrc
>    data = <6 bytes> 00 00 00 00 00 00
>
> # AtomicParsley generated tags (mp4dump)
>
>  type udta
>   type cprt
>    type ?MY
>     data = <11 bytes> 20 43 4f 50 59 52 49 47 48 54 00
>   type dscp
>    data = <25 bytes>
>    00 00 00 00 2a 0e e6 97 a5 e6 9c ac e8 aa 9e e3
>    83 86 e3 82 b9 e3 83 88 00
>   type titl
>    data = <15 bytes> 00 00 00 00 15 c7 4d 59 20 54 49 54 4c 45 00
>   type auth
>    data = <13 bytes> 00 00 00 00 2a 0e 4d 45 20 53 41 4e 00
>  type free
>  type mdat
>
>
> If someone can point me the difference and/or how to generate
> AtomicParsley format I will try to patch ffmpeg to generate similar
> tags.

FFmpeg is writing the strings in Unicode and AtomicParsely is writing
them in plain ASCII.