[FFmpeg-trac] #4209(avformat:open): GPS coordinates location and other iOS metadata in MOV are not copied to output MP4
FFmpeg
trac at avcodec.org
Wed Apr 10 19:02:05 EEST 2024
#4209: GPS coordinates location and other iOS metadata in MOV are not copied to
output MP4
------------------------------------+------------------------------------
Reporter: elmimmo | Owner: (none)
Type: defect | Status: open
Priority: normal | Component: avformat
Version: git-master | Resolution:
Keywords: mov | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
------------------------------------+------------------------------------
Comment (by wywh):
In fact, ffmpeg copies {{{Keys}}}, {{{UserData}}} and {{{ItemList}}} tags
to the same {{{Keys}}} tags embedded in {{{UserData}}} atom tags that
Apple's apps do not display.
For example, ffmpeg copies {{{Keys}}}, {{{UserData}}} and {{{ItemList}}}
GPS coordinate tags about the same way:
{{{
ffmpeg6 -i input.mp4 -c copy -movflags use_metadata_tags -map_metadata 0
output.mp4
ffmpeg version 6.1.1 Copyright (c) 2000-2023 the FFmpeg developers
built with Apple clang version 15.0.0 (clang-1500.1.0.2.5)
configuration: --cc=/usr/bin/clang
--datadir=/opt/local/libexec/ffmpeg6/share/data
--docdir=/opt/local/libexec/ffmpeg6/share/doc --progs-suffix=6
--prefix=/opt/local/libexec/ffmpeg6 --enable-audiotoolbox --disable-
indev=jack --disable-libjack --disable-libopencore-amrnb --disable-
libopencore-amrwb --disable-libxcb --disable-libxcb-shm --disable-libxcb-
xfixes --disable-metal --disable-outdev=xv --enable-opencl --enable-sdl2
--disable-securetransport --enable-videotoolbox --disable-xlib --enable-
avfilter --enable-fontconfig --enable-gnutls --enable-libass --enable-
libbluray --enable-libdav1d --enable-libfreetype --enable-libfribidi
--enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-
libopus --enable-librsvg --enable-libsoxr --enable-libspeex --enable-
libtheora --enable-libvorbis --enable-libvpx --enable-libzimg --enable-
libzvbi --enable-lzma --enable-shared --enable-pthreads --enable-swscale
--enable-zlib --enable-libaom --enable-libsvtav1 --arch=x86_64 --enable-
x86asm --enable-gpl --enable-libvidstab --enable-libx264 --enable-libx265
--enable-libxvid --enable-postproc
libavutil 58. 29.100 / 58. 29.100
libavcodec 60. 31.102 / 60. 31.102
libavformat 60. 16.100 / 60. 16.100
libavdevice 60. 3.100 / 60. 3.100
libavfilter 9. 12.100 / 9. 12.100
libswscale 7. 5.100 / 7. 5.100
libswresample 4. 12.100 / 4. 12.100
libpostproc 57. 3.100 / 57. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: isommp41mp42
creation_time : 2005-05-05T09:05:05.000000Z
location : -36.6101-066.91515+119.900/
location-eng : -36.6101-066.91515+119.900/
com.apple.quicktime.location.ISO6709: -36.6101-066.91515+119.900/
Duration: 00:00:04.00, start: 0.000000, bitrate: 2593 kb/s
Stream #0:0[0x1](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 133 kb/s (default)
Metadata:
handler_name : Core Media Audio
vendor_id : [0][0][0][0]
Stream #0:1[0x2](und): Video: h264 (High) (avc1 / 0x31637661),
yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 2452 kb/s,
25 fps, 25 tbr, 25k tbn (default)
Metadata:
handler_name : Core Media Video
vendor_id : [0][0][0][0]
Output #0, mp4, to 'output.mp4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: isommp41mp42
creation_time : 2005-05-05T09:05:05.000000Z
location : -36.6101-066.91515+119.900/
location-eng : -36.6101-066.91515+119.900/
com.apple.quicktime.location.ISO6709: -36.6101-066.91515+119.900/
encoder : Lavf60.16.100
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv,
bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 2452 kb/s, 25
fps, 25 tbr, 25k tbn (default)
Metadata:
handler_name : Core Media Video
vendor_id : [0][0][0][0]
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 133 kb/s (default)
Metadata:
handler_name : Core Media Audio
vendor_id : [0][0][0][0]
Stream mapping:
Stream #0:1 -> #0:0 (copy)
Stream #0:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
[out#0/mp4 @ 0x7f85f801f4c0] video:1197kB audio:66kB subtitle:0kB other
streams:0kB global headers:0kB muxing overhead: 0.329143%
size= 1268kB time=00:00:03.98 bitrate=2603.7kbits/s speed=1.26e+03x
}}}
{{{Keys}}}, {{{UserData}}} and {{{ItemList}}} are all copied to {{{Keys}}}
tags embedded in {{{UserData}}} atom {{{'MOV-Movie-UserData-Meta-Keys'}}}
which Apple's apps do not display. exiftool -G5 switch reveals that
difference (output grouped as {{{Keys-UserData-ItemList}}}):
{{{
exiftool -a -G5 -s -n -api LargeFileSupport=1 -Keys:All -UserData:All
-ItemList:All .
======== ./input.mp4
[MOV-Movie-Meta-Keys] GPSCoordinates : -36.6101 -66.91515 119.9
[MOV-Movie-UserData] GPSCoordinates : -36.6101 -66.91515 119.9
[MOV-Movie-UserData-Meta-ItemList] GPSCoordinates: -36.6101 -66.91515
119.9
======== ./output.mp4
[MOV-Movie-UserData-Meta-Keys] GPSCoordinates : -36.6101 -66.91515 119.9
[MOV-Movie-UserData-Meta-Keys] Location :
-36.6101-066.91515+119.900/
[MOV-Movie-UserData-Meta-Keys] Location-eng :
-36.6101-066.91515+119.900/
[MOV-Movie-UserData] LocationInformation : (none) Role=shooting
Lat=-36.61009 Lon=-66.91515 Alt=119.90 Body=earth Notes=
[MOV-Movie-UserData-Meta-Keys] Location :
-36.6101-066.91515+119.900/
[MOV-Movie-UserData] LocationInformation : (none) Role=shooting
Lat=-36.61009 Lon=-66.91515 Alt=119.90 Body=earth Notes=
}}}
The same with exiftool G1 switch. ffmpeg adds those extra lines for
{{{UserData}}} and {{{ItemList}}} GPS:
{{{
exiftool -a -G1 -s -n -api LargeFileSupport=1 -Keys:All -UserData:All
-ItemList:All .
======== ./input.mp4
[Keys] GPSCoordinates : -36.6101 -66.91515 119.9
[UserData] GPSCoordinates : -36.6101 -66.91515 119.9
[ItemList] GPSCoordinates : -36.6101 -66.91515 119.9
======== ./output.mp4
[Keys] GPSCoordinates : -36.6101 -66.91515 119.9
[Keys] Location :
-36.6101-066.91515+119.900/
[Keys] Location-eng :
-36.6101-066.91515+119.900/
[UserData] LocationInformation : (none) Role=shooting
Lat=-36.61009 Lon=-66.91515 Alt=119.90 Body=earth Notes=
[Keys] Location :
-36.6101-066.91515+119.900/
[UserData] LocationInformation : (none) Role=shooting
Lat=-36.61009 Lon=-66.91515 Alt=119.90 Body=earth Notes=
}}}
p.s. Notice that {{{Keys}}} tags are actually stored inside the
{{{ItemList}}}, so deleting the {{{ItemList}}} group as a block (ie.
{{{-ItemList:All=}}}) also deletes Keys tags. Instead, to preserve
{{{Keys}}} tags the {{{ItemList}}} tags may be deleted individually with
{{{-QuickTime:ItemList:All=}}}.
https://exiftool.org/forum/index.php?topic=14491.msg78100#msg78100
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4209#comment:27>
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