[FFmpeg-user] Copy all metadata fields?

[Ulf Zibis]

Hi Peter,

you can use "-map_metadata 0".
It copies all possible metadata from input to output.

-Ulf

Am 18.03.20 um 07:49 schrieb Peter B.:
> Hi everyone!
>
> Is it possible to ask/force FFmpeg to keep as many metadata fields as technically possible when transcoding or rewrapping?
>
> I understand that not all (container-)formats support the same metadata fields, but I've noticed for example that when rewrapping, not all metadata fields that were populated in the input are then present in the output - even if the format is identical.
>
>
> Here is an example of rewrapping MOV to MOV where I've noticed the following data missing in the output (commandline and output see below):
>
>   * color information (smpte170m/bt470bg/bt709)
>   * creation_time (*)
>
>
> I'm grateful for any hints or suggestions!
> Thank you in advance,
> Peter
>
> (*) Copying "creation_time" may be controversial, but it would be amazing to be able to preserve this information in the output (e.g. map it to a different field?).
>
>
>
>
> Files were created with the following command:
> // ------------------------
> $ ffmpeg -i in.mov -c copy -map 0 out.mov
> // ------------------------
>
>
> Then metadata checked as follows:
> // ------------------------
> $ ffmpeg -i in.mov -i out.mov -hide_banner
> // ------------------------
>
>
>
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mov':
>   Metadata:
>     major_brand     : qt
>     minor_version   : 0
>     compatible_brands: qt
>     creation_time   : 2012-01-18T12:50:53.000000Z
>   Duration: 00:03:54.80, start: 0.000000, bitrate: 30453 kb/s
>     Stream #0:0(und): Video: dvvideo (dvcp / 0x70637664), yuv420p(smpte170m/bt470bg/bt709, bottom coded first (swapped)), 720x576 [SAR 16:15 DAR 4:3], 28800 kb/s, SAR 59:54 DAR 295:216, 25 fps, 25 tbr, 25k tbn, 25 tbc (default)
>     Metadata:
>       creation_time   : 2012-01-18T12:50:53.000000Z
>       handler_name    : Core Media Video
>       encoder         : DV - PAL
>       timecode        : 00:37:50:04
>     Stream #0:1(und): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
>     Metadata:
>       creation_time   : 2012-01-18T12:50:53.000000Z
>       handler_name    : Core Media Audio
>     Stream #0:2(und): Data: none (tmcd / 0x64636D74)
>     Metadata:
>       creation_time   : 2012-01-18T12:50:53.000000Z
>       handler_name    : Core Media Time Code
>       reel_name       : 2001-11-10_KveldsseteKaarvatn
>       timecode        : 00:37:50:04
>
>
> Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'out.mov':
>   Metadata:
>     major_brand     : qt
>     minor_version   : 512
>     compatible_brands: qt
>     encoder         : Lavf58.33.100
>   Duration: 00:03:54.84, start: 0.000000, bitrate: 30333 kb/s
>     Stream #1:0: Video: dvvideo (dvcp / 0x70637664), yuv420p(bottom coded first (swapped)), 720x576 [SAR 16:15 DAR 4:3], 28800 kb/s, SAR 59:54 DAR 295:216, 25 fps, 25 tbr, 25k tbn, 25 tbc (default)
>     Metadata:
>       handler_name    : Core Media Video
>       encoder         : DV - PAL
>       timecode        : 00:37:50:04
>     Stream #1:1: Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
>     Metadata:
>       handler_name    : Core Media Audio
>     Stream #1:2: Data: none (tmcd / 0x64636D74)
>     Metadata:
>       handler_name    : Core Media Time Code
>       reel_name       : 2001-11-10_KveldsseteKaarvatn
>       timecode        : 00:37:50:04
> At least one output file must be specified
>
>
>
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>
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>
>
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