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If a video does not matter on a video... you could use an audio file like mp3. But let us assume you are uploading it on a video platform like youtube. Then the video format should be accepted by the platform. If you want to use it on your website, the most commonly used container is MP4, so use that. But what you want to change are the video parameters. For ...


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You have 37 minutes and 14 seconds of audio, so it's going to be at least as large as the original audio file (36Mb) plus one image and a few bytes for each frame saying "the image has not changed". You have some 67,000 frames if you build a 30 fps video. So it will look larger than the input audio file. It could be that the settings are such that ...


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Specify bitrate as -b:v 0 made the trick forme, the overall bitrate bumped from 2m to 16m. ffmpeg -i in.mp4 -c:v h264_nvenc -b:v 0 out.mp4


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