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ffmpeg changes audio bitrate when transcoding from MKV to FLV
https://superuser.com/questions/909167/ffmpeg-changes-audio-bitrate-when-transcoding-from-mkv-to-flv
ffmpeg -i sample.mkv -c:v copy -c:a pcm_s16le -ac 2 sample.flv This will reduce the number of audio channels, but they will not lose any quality. The bitrate will look lower, but it's fewer channels. Your other choices are AAC audio or MP3 audio: ffmpeg -i sample.mkv -c:v copy -c:a aac -strict experimental -b:a 128k sample.flv ffmpeg -i sample ...
batch file - ffmpeg conversion - keep audio bitrate ...
https://stackoverflow.com/questions/11196474/ffmpeg-conversion-keep-audio-bitrate
I'm using ffmpeg to extract the audio from different video formats (flv, mp4) and convert it to mp3. %~dp0ffmpeg.exe -i %1 -ar 44100 -ac 2 -ab 128k "%~dpn1.mp3". This works just fine. However, in my input files, the audio bitrate varies, and I want to adjust the output bitrate accordingly. Even by extensive Google searching, I didn't find any ...
Use FFmpeg To Easily Extract Audio From FLV FIles
https://helpdeskgeek.com/linux-tips/use-ffmpeg-to-easily-extract-audio-from-flv-files/
Extracting Audio From FLV Files. Once installed, using FFmpeg is pretty simple, as long as you know which commands to use. There are hundreds of different options, a special syntax to use in different circumstance, and the sheer power and complexity can be a bit overwhelming. Thankfully, for our job, FFmpeg is pretty straightforward.
How to Get Video Bitrate with FFmpeg (video, audio & …
https://www.skillsugar.com/how-to-get-video-bitrate-with-ffmpeg-video-audio-total
Get the Total Bitrate of a Video. To get the total bitrate of a video, use the following ffprobe command: The first bit_rate value is the video stream and the second is the audio stream. The bite_rate value is in bits per second so 2293882 + 209716 would be about 2.5 Megabits per second total. To return only the numerical values set the output ...
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.
ffmpeg how do i know what audio rate to use? - Stack …
https://stackoverflow.com/questions/3921464/ffmpeg-how-do-i-know-what-audio-rate-to-use
Show activity on this post. You have to use "ffmpeg -i video.avi" to know the sampling rate and the bitrate of the audio stream in the source video.avi. The audio stream can be extracted with the same sampling rate and bitrate without lose quality. You can decide to reduce one of them for size reasons, but don't increment one of them to ...
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