[FFmpeg-devel] [BUG] Storage of 3gpp metadata in 3gp files

[Larbi Joubala]

Baptiste Coudurier a ?crit :
> Hi,
>
> Larbi Joubala wrote:
>   
>> Hi guys!
>>
>>    I recently found that when I set metadata in 3gp files that the
>> metadata are not displayed by any players or tools. I tested with
>> QuickTime player and an other mp4/3gp/mov file analyzer
>> tool("scenescope"). Then, to see where the issue comes from, I digged in
>> the source code in paricularly "movenc.c" and I found out that the
>> metadata are stored in UTF16 way but without the BOM(Byte Order Marker)
>> to indicate the endianness. The 3gp standard say that the metadata value
>> can be stored in UTF8 way or UTF16 way but for UTF16 the string value
>> shall start with the following BOM 0xFFFE for big-endian.
>>
>> Is this issue known and why don't store the metadata value with UTF8
>> encoding characters to avoid to add the BOM in the beginning of the string?
>>     
>
> UTF8 is prefered I think.
>
>   
Ok, so here is a patch which allows MOV muxer to store 3gpp metadata 
value in a UTF8 way.

-- 
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*Larbi Joubala
* ingenieur d?veloppement logiciel
*Resonate mp4
* 29 rue Miguel Hidalgo 75019 Paris
Tel: 01.42.41.16.65
Fax: 01.42.45.47.18
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