Want to get ffmpeg 7.1 (MacOS) to compress mp4 files produced by GoPro while copying the metadata streams, particularly the GPS data. It works to MOV output but not MP4 output. I would like to keep it as mp4 for max compatibility. It seems to choke copying stream 2, the tmcd stream. Insights welcome, thanks!
Here’s the command that works:
ffmpeg -i GX-0195-02.MP4 -copy_unknown -map 0 -map_metadata 0 -c:v hevc_videotoolbox -q:v 45 -vtag hvc1 GX-0195-02-htb45.mov
If I simply change the output file name from .mov to .mp4, I get the following error:
[mp4 @ 0x13af06a70] You requested a copy of the original timecode track so timecode metadata are now ignored [mp4 @ 0x13af06a70] Could not find tag for codec none in stream #2, codec not currently supported in container [out#0/mp4 @ 0x600000194180] Could not write header (incorrect codec parameters ?): Invalid argument [vf#0:0 @ 0x600000594140] Error sending frames to consumers: Invalid argument [vf#0:0 @ 0x600000594140] Task finished with error code: -22 (Invalid argument) [vf#0:0 @ 0x600000594140] Terminating thread with return code -22 (Invalid argument) [out#0/mp4 @ 0x600000194180] Nothing was written into output file, because at least one of its streams received no packets.
Here’s the input file info:
% ffprobe GX-0195-02.MP4 11:05:32 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'GX-0195-02.MP4': Metadata: major_brand : mp41 minor_version : 538120216 compatible_brands: mp41 creation_time : 2024-08-05T16:21:07.000000Z firmware : H22.01.02.30.70 Duration: 00:03:31.01, start: 0.000000, bitrate: 45108 kb/s Stream #0:0[0x1](eng): Video: hevc (Main) (hvc1 / 0x31637668), yuvj420p(pc, bt709), 3840x2160 [SAR 1:1 DAR 16:9], 44844 kb/s, 29.97 fps, 29.97 tbr, 30k tbn (default) Metadata: creation_time : 2024-08-05T16:21:07.000000Z handler_name : GoPro H.265 vendor_id : [0][0][0][0] encoder : GoPro H.265 encoder timecode : 10:00:05:09 Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default) Metadata: creation_time : 2024-08-05T16:21:07.000000Z handler_name : GoPro AAC vendor_id : [0][0][0][0] timecode : 10:00:05:09 Stream #0:2[0x3](eng): Data: none (tmcd / 0x64636D74) (default) Metadata: creation_time : 2024-08-05T16:21:07.000000Z handler_name : GoPro TCD timecode : 10:00:05:09 Stream #0:3[0x4](eng): Data: bin_data (gpmd / 0x646D7067), 57 kb/s (default) Metadata: creation_time : 2024-08-05T16:21:07.000000Z handler_name : GoPro MET Unsupported codec with id 0 for input stream 2 Unsupported codec with id 98314 for input stream 3`
Have tried variations on -tag:2 based on other searches, but I don’t quite know what that’s actually doing so don’t fully understand syntax or implications.
