On Fri, Jul 30, 2021 at 3:47 PM William C Bonner <wbon...@wimsworld.com> wrote:
> On Wed, Jul 28, 2021 at 3:15 PM Suporte JM <jmgeosupo...@gmail.com> wrote: > >> Hi, >> >> I have a Garmin 66W dashcam for my work (street mapping surveyor) which >> produces several 1min. MP4 videos of my journey (60 min. = 60 videos). All >> these videos have telemetry data on it as metadata (GPS location, speed, >> etc...). >> >> I want to concatenate every 5 files excluding the audio but preserving the >> video and the telemetry in the metadata. >> >> What I have tried so far: >> >> >> - Export GPS information as GPX file (result: successful) >> >> *exiftool -p gpx.fmt -ee X:\video_place\videos_1m\GRMN0005.mp4 > >> GRMN0005.gpx* >> >> >> - Merge MP4 videos as a single MP4 video (result: partially successful) >> >> *ffmpeg -f concat -safe 0 -i X:\video_place\videos_1m\mylist.txt -c copy >> X:\video_place\videos_1m\GRMN0005to0011.mp4* >> >> When I use the above command on ffmpeg *I lose all my telemetry data*. >> >> I tried in several different ways for days, searching on several forums, I >> even tried to export all GPS data from each single 1min. file merge them, >> and then merge the videos and put the telemetry back. >> >> The ffprobe output of my 1min. video is as following: >> >> >> *Metadata:major_brand : avc1minor_version : 0compatible_brands: >> avc1isomcreation_time : 2021-07-26T17:08:23.000000ZDuration: 00:01:00.06, >> start: 0.000000, bitrate: 19553 kb/sStream #0:0(eng): Video: h264 (Main) >> (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 19182 kb/s, 29.97 fps, >> 29.97 tbr, 30k tbn (default)Metadata:creation_time : >> 2021-07-26T17:08:23.000000Zhandler_name : Ambarella AVCvendor_id : >> [0][0][0][0]encoder : Ambarella AVC encoderStream #0:1(eng): Audio: aac >> (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 128 kb/s >> (default)Metadata:creation_time : 2021-07-26T17:08:23.000000Zhandler_name >> : >> Ambarella AACvendor_id : [0][0][0][0]Stream #0:2(eng): Subtitle: mov_text >> (text / 0x74786574), 0 kb/s (default)Metadata:creation_time : >> 2021-07-26T17:08:23.000000Zhandler_name : Ambarella EXT* >> >> I have tried as well with following code, but none of them seems to work: >> >> >> *ffmpeg -f concat -safe 0 -i X:\video_place\videos_1m\mylist.txt -c copy >> -scodec copy X:\video_place\videos_1m\GRMN0005to0011_scodec.mp4* >> >> >> *ffmpeg -f concat -safe 0 -i X:\video_place\videos_1m\mylist.txt -c:s copy >> -c:v copy X:\video_place\videos_1m\GRMN0005to0011.mp4* >> >> *ffmpeg -f concat -safe 0 -i X:\video_place\videos_1m\mylist.txt -c copy >> -c:s mov_text X:\video_place\videos_1m\GRMN0005to0011.mp4* >> >> What am I missing? >> > > I don't know if this will help, but I have a program I wrote that uses > ffmpeg to concatenate the output files from my drone and embed the subtitle > files that are created for each input mp4 file. I'm creating MKV files, > because they are the most flexible video storage format that I've found. > > I create two temporary files for the input, the first is the list of the > MP4 files, the second the list of SRT files. > > ffmpeg.exe -hide_banner -f concat -safe 0 -i > C:\Users\Wim\AppData\Local\Temp\WimF5FC.tmp -f concat -safe 0 -i > C:\Users\Wim\AppData\Local\Temp\WimF5FD.tmp -map 0:v -map 1 -c:v copy -c:s > copy -movflags +faststart -n 20210718.mkv > > The nice thing that I figured out is that the SRT files get added at the > correct point in the output file, and I can run the following command to > extract a copy of the SRT that's been embedded, and I see the timestamps > are correct for the full concatenated file. > > ffmpeg.exe -hide_banner -n -i 20210718.mkv 20210718.srt > > I remembered another trick that I'd run into when converting DVD rips to h.264 but keeping all the subtitle or audio tracks from the original. It has to do with the -map 0 option. Try this version of your command: ffmpeg -f concat -safe 0 -i X:\video_place\videos_1m\mylist.txt -c:v copy -c:a copy -c:s copy -map 0 X:\video_place\videos_1m\GRMN0005to0011.mp4 _______________________________________________ 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".
