I already follow ffmpeg -f concat -i drone-shots.txt -c copy output.mp4 but the result, sound of output video very slow, it not keep same with original sound.
i understand. can you check what is the codec and bitrate for audio in each file? if they are not same, then instead of copying codec, reencode the video, this should resolve the issue
Hi, congratulations for the simplicity in describing the process of concatenating even different videos. A question... I have two 360° videos in mov format can I use the ffmpeg command or do I necessarily have to convert them to Mp4? There are converters that when they convert from mov to mp4 make the video no longer 360. thanks
Thanks for your comment! The 'non-monotonic dts' error can occur due to timestamp issues. Try adding '-fflags +genpts' before the input files in your ffmpeg command to fix it. Let me know if that helps!
It seems like the output duration is longer than expected. This might happen due to incorrect input durations or incorrect concatenation settings. Make sure the durations of your input files are accurately specified in the ffmpeg command. You can also try explicitly setting the output duration using the '-t' option followed by the desired duration. Let me know if you need further clarification!
When concatenating multiple video files using FFmpeg, the codec, resolution, and other parameters of the input files must be consistent for the output file to be playable. If the input files all have the same codec and resolution, and you are using the same arguments and extra arguments for all the input files, then it is likely that the output file will be playable. To concatenate multiple video files using FFmpeg, you can use the concat filter. The basic syntax is as follows: ffmpeg -i file1.mp4 -i file2.mp4 -i file3.mp4 -filter_complex "[0:v][0:a][1:v][1:a][2:v][2:a]concat=n=3:v=1:a=1[outv][outa]" -map "[outv]" -map "[outa]" output.mp4 This command will take 3 video files file1.mp4, file2.mp4 and file3.mp4 and concatenate them in to a single output file output.mp4. In this command, n=3 specifies the number of input files to be concatenated, v=1 specifies that the video streams should be concatenated and a=1 specifies that the audio streams should be concatenated. It's important to note that, if the input video files have different codecs, resolutions, or other parameters, FFmpeg will not be able to concatenate them directly. You would have to re-encode the input files to match the codec, resolution, and other parameters of one of the input files. Also, when concatenating video files, it is important to ensure that the video and audio streams are correctly aligned so that the final output file is in sync.
