[FFmpeg-user] filter ffmetadata does not output all metadata and is missing in documentation

[James Darnley]

On 2020-03-03 23:07, Ulf Zibis wrote:
> $ ~/Projects/ffmpeg/ffmpeg-git-20200211-amd64-static/ffmpeg -i
> 20200205_165401.mp4 -f ffmetadata 20200205_165401.meta 

> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '20200205_165401.mp4':
>   Metadata:
>     major_brand     : mp42
>     minor_version   : 0
>     compatible_brands: isommp42
>     creation_time   : 2020-02-05T19:55:01.000000Z
>     location        : -00.7655-047.1715/
>     location-eng    : -00.7655-047.1715/
>     com.android.version: 8.0.0
>   Duration: 00:00:58.65, start: 0.000000, bitrate: 17273 kb/s

> File '20200205_165401.meta' already exists. Overwrite? [y/N] y
> Output #0, ffmetadata, to '20200205_165401.meta':
>   Metadata:
>     major_brand     : mp42
>     minor_version   : 0
>     compatible_brands: isommp42
>     com.android.version: 8.0.0
>     location        : -00.7655-047.1715/
>     location-eng    : -00.7655-047.1715/
>     encoder         : Lavf58.38.100
> Stream mapping:
> Press [q] to stop, [?] for help

It is clearly present in the input file's metadata so how is it not
copied into the output file?

To the source!