[FFmpeg-user] Fwd: Not able to extract the metadata

[Francois Visagie]

> -----Original Message-----
> From: ffmpeg-user-bounces at ffmpeg.org [mailto:ffmpeg-user-
> bounces at ffmpeg.org] On Behalf Of Seema Singh
> Sent: 14 March 2014 07:26
> To: ffmpeg-user at ffmpeg.org
> Subject: [FFmpeg-user] Fwd: Not able to extract the metadata
> 
> Hi All,
> 
> Any help/input for below problem??
> 
> Regards,
> Seema.
> 
> ------- Original Message -------
> Sender : Seema Singh<seema.singh at samsung.com>  Lead Engineer/SRI-
> Bangalore-TZN/Samsung Electronics
> Date   : Mar 12, 2014 14:58 (GMT+09:00)
> Title  : Not able to extract the metadata
> 
> Hi All,
> 
> I am new to ffmpeg , started off with very basics things .
> Like check the Metadata of a video file.
> But facing the below error .
> 
> Command used :
> 
> fmpeg -i ../TestFiles/Mimic__H264_15fps_D1.MP4 -f ffmetadata
> metadata.txt
> 
> 
> Command output:
> __________________________________________________________
> _________________
> ffmpeg version 2.2.git Copyright (c) 2000-2014 the FFmpeg developers
>   built on Mar  5 2014 12:38:54 with gcc 4.6 (Ubuntu/Linaro
4.6.3-1ubuntu5)
>   configuration: --prefix=/home/seema.s/ffmpeg_build --extra-cflags=-
> I/home/seema.s/ffmpeg_build/include --extra-ldflags=-
> L/home/seema.s/ffmpeg_build/lib --bindir=/home/seema.s/bin --extra-
> libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac
--enable-libmp3lame
> --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --
> enable-libx264 --enable-nonfree --enable-x11grab
>   libavutil      52. 66.101 / 52. 66.101
>   libavcodec     55. 52.102 / 55. 52.102
>   libavformat    55. 33.101 / 55. 33.101
>   libavdevice    55. 11.100 / 55. 11.100
>   libavfilter     4.  2.100 /  4.  2.100
>   libswscale      2.  5.101 /  2.  5.101
>   libswresample   0. 18.100 /  0. 18.100
>   libpostproc    52.  3.100 / 52.  3.100
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
> '../TestFiles/Mimic__H264_15fps_D1.MP4':
>   Metadata:
>     major_brand     : mp42
>     minor_version   : 1
>     compatible_brands: isomiso2avc1mp41mp423gp5
>     creation_time   : 2010-04-28 10:39:08
>     title           : Mimic_mp4-92_amr-12.3gp.MP4.MP4
>     artist          : created with SUPER(C).v2010.bld.37
>     encoder         : eRightSoft
>     comment         : 16:09:25
>   Duration: 00:00:40.07, start: 0.000000, bitrate: 1249 kb/s
>     Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 /
0x31637661),
> yuv420p, 720x480 [SAR 1:1 DAR 3:2], 1248 kb/s, 15 fps, 15 tbr, 15 tbn, 30
tbc
> (default)
>     Metadata:
>       creation_time   : 2010-04-28 10:39:08
>       handler_name    : VideoHandler
>     Stream #0:1(und): Data: none (mp4s / 0x7334706D), 0 kb/s (default)
>     Metadata:
>       creation_time   : 2010-04-27 10:39:21
>       handler_name    : GPAC MPEG-4 OD Handler
>     Stream #0:2(und): Data: none (mp4s / 0x7334706D), 0 kb/s (default)
>     Metadata:
>       creation_time   : 2010-04-27 10:39:21
>       handler_name    : GPAC MPEG-4 BIFS Handler
> File 'metadata.txt' already exists. Overwrite ? [y/N] y Output #0,
ffmetadata,
> to 'metadata.txt':
>   Metadata:
>     major_brand     : mp42
>     minor_version   : 1
>     compatible_brands: isomiso2avc1mp41mp423gp5
>     comment         : 16:09:25
>     title           : Mimic_mp4-92_amr-12.3gp.MP4.MP4
>     artist          : created with SUPER(C).v2010.bld.37
> Stream mapping:
> Press [q] to stop, [?] for help
> size=       0kB time=-577014:-32:-22.-77 bitrate=N/A
> video:0kB audio:0kB subtitle:0 data:0 global headers:0kB muxing overhead
> 0.000000% Output file is empty, nothing was encoded (check -ss / -t / -
> frames parameters if used)
> __________________________________________________________
> ___________________________________
> 
> 
> Have I missed something here? Please let me know.

As mentioned in previous replies, ffmpeg's output file is only used for AV
content, not for metadata. Metadata is written to the console as you can see
in your output above. If you want that in a file, use output redirection.

The "error message" at the end that seems to bother you is caused by the
fact that your command line specifies no AV encoding to occur. This means
ffmpeg never needed to write to the (AV, remember) output file.

Hope this helps.

> 
> Regards,
> Seema.<p> </p><p> </p>
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