The following tested command will convert a .mp4 video that I dragged to the Desktop into a .mp3 audio file (also on the Desktop): ffmpeg -i "Herding Cats".mp4 -acodec libmp3lame -ac 2 -ab 160k -ar 48000 foo.mp3. That command-line is from that Linux page link showing constant bitrate encoding (CBR). Reply.
iFunia MKV Converter is a stable and simple-to-use Mac MKV video converter helps you convert MKV to most popular video/audio formats, such as converting MKV to MP4, MKV to AVI, MKV to iPad, MKV to PS3, MKV to VOB, MKV to WMV, MKV to FLV, MKV to MP3 and more, and you could convert the 2D MKV video to other video formats in 3D effortlessly. Key
Choose the output MP3 format. Click the "Convert" button to convert; if you need to change the output file format, choose the "Convert to" button to change the output file format and then click the "Convert" button to convert. STEP 3.
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