moment0instant03d.jpeg -vcodec mpeg4 movienoqual.mp4 Specify a high quality ffmpeg -i. The article he quotes mentions using multi-pass conversion, which is a good way to achieve better compression without sacrificing quality. ffmpeg is an all-in-one video conversion swiss army knife. Marty Jay helpfully mentions that sameq means same quantizer as in the input, which may not result in the same quality. mp4togif.bash This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. The last time I transcoded video I used qscale=8.0, but I'd suggest that you experiment to find the optimum to match the quality of your input. There’s a mixture of files sizes and types from. I’m using ffmpeg Python to loop over my file structure and output any non-mp4 files. The lower the number the better the quality, but the more space your file will take. mp4 ffmpeg settings for quality and space. Alternatively, you may want to use the qscale option to set the quality manually. ffmpeg -loop 1 -i image.jpg -i audio.mp3 -shortest -c:a copy output.mp4 Results: image.jpg 26.7K (image not so clear) audio.mp3 64.6M (54 minutes) output.mp4 80.6M (video result is not so clear, music still good) Is it a reasonable size for MP4 ffmpeg Share Improve this question edited at 23:51 llogan 10. I hope you can use zetah's suggestion above in his comment and use the -sameq switch. If you must transcode because you need to use a particular video codec 3 Answers Sorted by: 24 My solution: ffmpeg -i filename.mp4 -vcodec copy -acodec copy filename. codec:copy may be helpful if you don't have a reason to transcode (and it should be faster). You always lose a little quality whenever you transcode from one codec to another, video or audio, but perhaps you can avoid it if you only want to change from MP4 container type to an AVI container.
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