I have been struggling with .mp4's for about 2 days now, trying to concatenate a series of about 20 into 1 single file. Any differences between the files and it is a nightmare. Some files have different fps, and others different ratios.
I wanted to know if mp4 is the format I should be using, or if there is a better, easy to use format for concatenation. Time isn't an issue, I simply need a relatively high-quality format that concatenates under most circumstances.
If this doesn't exist, any suggestions on how to deal with massively varying properties of mp4 files (I'm not entirely sure of what can differ aside from fps and ratio between videos that may cause a problem) would be great.
I am using ffmpeg to try and concatenate the files. First I tried to use the demuxer, and then the concat filter, however I find the concat filter very daunting and am completely at a loss as to how to use it.
Each video has audio, some have still images while others have moving.