![]() ![]() ![]() ![]() You can delete the originals and intermediate files once you confirm the output.mp4 file is correct. So I found this answer on StackOverflow, which had exactly the commands I needed: ffmpeg -i 1.mp4 -c copy -bsf:v h264mp4toannexb -f mpegts intermediate1.ts ffmpeg -i 2. This is an annoying interim step for long-running footage from a GoPro-and I've noticed other action cams and dash cams seem to do the same thing.Īnd unfortunately, you can't just use concat: to join the files together in a one-liner, you have to build the intermediate files first (thus you need triple the original footage's size on your disk to do this trick). There are various reasons for this, but in the end, I really wanted one long file, so it would be easier to synchronize with footage from another camera and my audio recorder. In the end, you should get a losslessly-joined MP4 file with the contents of all the video files from the sequence. 1 See How to concatenate clips from the same video with ffmpeg. This assumes I renamed my files from the GoPro to 1.mp4 and so on, and I'm in the same directory as those files. Note: If you use the 'High Efficiency' (HEVC) encoder for your GoPro videos, change h264_mp4toannexb to hevc_mp4toannexb in the above commands. Another method is to to create the segments individually and stream copy them instead of re-encoding (to save time and quality), and join them with the concat demuxer. There is another easy way to import media files to the program, that is to drag and drop the to the media libary area. So I found this answer on StackOverflow, which had exactly the commands I needed: ffmpeg -i 1.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.tsįfmpeg -i 2.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.tsįfmpeg -i 3.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate3.tsįfmpeg -i 4.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate4.tsįfmpeg -i "concat:intermediate1.ts|intermediate2.ts|intermediate3.ts|intermediate4.ts" -c copy -bsf:a aac_adtstoasc output.mp4 When you enter the main interface of this FFmpeg alternative, click the Import Media Files Here Button to select video clips, audio clips, and photos from dialogue box and add them to the program for the combination. There are various reasons for this, but in the end, I really wanted one long file, so it would be easier to synchronize with footage from another camera and my audio recorder. I recently shot some footage with a GoPro, and realized after the fact the GoPro 'chapters' the footage around 4 GB, so I ended up with a number of 4 GB files, instead of one larger file. ![]()
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