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Extract AC3 Dolby Digital with FFMpeg - Savvy Admin
https://savvyadmin.com/extract-ac3-dolby-digital-with-ffmpeg/#:~:text=ffmpeg%20-i%20audio.ac3%20Input%20%230%2C%20ac3%2C,from%20%27audio.ac3%27%3A%20Duration%3A%2001%3A17%3A57.46%2C%20bitrate%3A%20448%20kb%2Fs
ffmpeg - How to specify audio and video bitrate - Super User
https://superuser.com/questions/319542/how-to-specify-audio-and-video-bitrate
In order to specify the target bitrate for video and audio, use the -b:v and -b:a options, respectively. You can use abbreviations like K for kBit/s and M for MBit/s. For example: ffmpeg -i input.mp4 -b:v 1M -b:a 192k output.avi Note: This is a simple one-pass encode that tries to reach the specified bitrate at the end.
Extract AC3 Dolby Digital with FFMpeg - Savvy Admin
https://savvyadmin.com/extract-ac3-dolby-digital-with-ffmpeg/
You can now use ffmpeg again to show that audio.ac3 only contains the ac3 audio stream. ffmpeg -i audio.ac3 Input #0, ac3, from 'audio.ac3': Duration: 01:17:57.46, bitrate: 448 kb/s Stream #0.0: Audio: ac3, 48000 Hz, 5.1, s16, 448 kb/s At least one output file must be specified. Now that you have extracted the audio stream, you can do anything ...
Simple DTS to AC3 using FFmpeg - GDion's Personal Blog
https://gdion.wordpress.com/2016/06/12/simple-dts-to-ac3-using-ffmpeg/
c:\ffmpeg\ is where you have extracted the FFmpeg build – myvideofile.mkv is the name of the video file you want the audio converted to AC3 – myvideofilewithAC3.mkv is the name of the new video file with the converted audio. The bit rate I use for AC3 is 640kb/s (the maximum for AC3).
audio - FFMPEG - 5.1 EAC3 encode output quality - Video ...
https://video.stackexchange.com/questions/28184/ffmpeg-5-1-eac3-encode-output-quality
Presuming ffmpeg's default AC-3 encoder, if you simply set the sample rate to 48kbps (which you did in your example above), you'd be encoding at 1,536kbps for all channels. That is because the only bit depth that codec supports is 32 bits per sample. 32 bit depth x 48,000 sampling frequency = 1,536,000 bits per second
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