搜尋結果
2015年6月14日 · 330. The basic command is: ffmpeg -i filename.mp4 filename.mp3. or. ffmpeg -i video.mp4 -b:a 192K -vn music.mp3. Check this URL: MP4 Video to MP3 File Using ffmpeg (Ubuntu 9.10 Karmic Koala) link broken [Updated on 7th Dec 2021] Note: Ubuntu does not supply FFmpeg, but the fork named Libav.
2018年8月3日 · 方法/步骤. 首先打开格式工厂。. 其次点击左侧的音频。. 然后在弹出的选项里选择MP3。. 接着点击添加文件，选择需要转换的MP4，并点击打开，点击确定。. 最后点击上方的开始，稍等片刻MP4就转换成MP3了。.
2015年1月18日 · Open command promt (windows + R -> Cmd + Enter). Then go to inside the folder where you have audio and video file. Apply this command: ffmpeg -i "videoFile.mp4" -i "audioFile.mp3" -shortest outPutFile.mp4. You will get a new file named outPutFile.mp4 (a merged file of audio and video) Share. Improve this answer.
I can successfully join multiple files using the following command: ffmpeg -f concat -i input.txt -codec copy output.mp4 The only problem with this command is that you need to read the filepaths ...
2017年6月4日 · Yes, but you have to manually supply the duration, and volume will be reduced. ffmpeg -i 1.mp3 -i 2.mp3 -filter_complex " [1]adelay=75000|75000 [b]; [0] [b]amix" out.mp375000 is the duration of 2.mp3 in milliseconds. Add -map_metadata 0. if any fields clash, the last specified map_metadata will overwrite the first.
Step 1: Open the VLC and select “Media”. Click on the convert/save. Step 2: On the next window that appears, select “add” and choose the video file (MP4) to be converted. Step 3: Next, click down arrow on the “Convert/Save” then click “Convert”. Step 4: On the next window that appears, make sure the “Convert” button is selected.
2013年10月29日 · mp4转换成mp3 无损音频格式转换 一键互转 音频文件格式转换软件，一键导入快速转换，支持 mp3 ，wav，aac，flac等多格式互转。 格式转换器，无损转换，操作简单易上手，立即下载转换文件。
MP3 is officially discontinued and obsolete codec (I hope it will become dead as soon as possible). Internet-world has already switched to AAC (more efficient & quality codec), and everyone should use that (instead of mp3): ffmpeg -i filenameee.m4a -acodec
2013年5月10日 · 91. Yes, it might actually make sense if you are being forced to change formats. If you have a file with 95kbps in a highly efficient format, to retain the same quality, a relatively inefficient format as mp3 needs a higher bitrate. Of course you will never get anything back that was lost in the first place.
2019年7月24日 · 5. You don't need to do this in three steps: ffmpeg -vn -sn -dn -i input.mp4 -codec:a libmp3lame -qscale:a 4 output.mp3. This creates a MP3 file with a VBR (variable bit rate) of 165. Check here for more options. Arguments (beware, the order matters!): -vn disables all video-streams from the input. -sn disables all subtitle-streams from the input.
