On 2020-03-04 01:51, Ulf Zibis wrote: > > Am 04.03.20 um 00:34 schrieb James Darnley: >> On 2020-03-04 00:16, James Darnley wrote: >>> It is clearly present in the input file's metadata so how is it not >>> copied into the output file? > > Even with normal transcoding "creation_time" is listed in the OUTPUT > metadata, but in the resulting output file it is missing.
I think the answer to that is shown in a previous log. > $ ~/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 > Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), > yuv420p(tv, bt709), 1920x1080, 17013 kb/s, SAR 1:1 DAR 16:9, 29.99 fps, > 30 tbr, 90k tbn, 180k tbc (default) > Metadata: > creation_time : 2020-02-05T19:55:01.000000Z > handler_name : VideoHandle > Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, > stereo, fltp, 256 kb/s (default) > Metadata: > creation_time : 2020-02-05T19:55:01.000000Z > handler_name : SoundHandle > 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 > size= 0kB time=-577014:32:22.77 bitrate=N/A speed=N/A > video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB > muxing overhead: unknown > Output file is empty, nothing was encoded The *other* creation time metadata is on the streams. The ffmetadata output file has no streams. Therefore it has no stream metadata I have no idea if you can change that. >> Trac ticket cause: http://trac.ffmpeg.org/ticket/1439 > That may make sense for normal transcoding, but not for: > ffmpeg -i INPUT.mp4 -f ffmetadata INPUT.meta You're probably right. >> I would say: use ffprobe to get the metadata of files. > > But how to transfer it to the output video? Modify ffmpeg to remove the line I showed before, currently in fftools/ffmpeg_opt.c at line 2608. Or get o->metadata_global_manual to be false. You seem to be able to do that with -map_metadata 0 but I thought that was the default anyway. I manually added creation_time to a file, used that as input for an ffmetadata output and sure enough, there it was. To which I said "what the flaming fuck". _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
