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ffmpeg how to convert audio to aac but keep bit rate at ...
https://stackoverflow.com/questions/47087802/ffmpeg-how-to-convert-audio-to-aac-but-keep-bit-rate-at-what-the-old-file-used#:~:text=You%20could%20detect%20the%20bitrate%20of%20the%20audio,128Kbps%20just%20use%20that%20original%20bitrate%20during%20conversion.
Encode/AAC – FFmpeg
https://trac.ffmpeg.org/wiki/Encode/AAC
ffmpeg - How to specify audio and video bitrate - Super User
https://superuser.com/questions/319542/how-to-specify-audio-and-video-bitrate
Stream 0 Type: Video Codec: H264-MPEG-4 AVC (part 10)avc1 Language: English Resolution: 1280x720 Frame rate: 24 Stream 1 Type: Audio Codec: MPEG AAC Audio (mp4a) Language: English Channels: Stereo Sample rate: 44100HZ. And I would like to use FFmpeg to convert that MOV file to an AVI file.
ffmpeg how to convert audio to aac but keep bit rate at ...
https://stackoverflow.com/questions/47087802/ffmpeg-how-to-convert-audio-to-aac-but-keep-bit-rate-at-what-the-old-file-used
Show activity on this post. I don't expect this to happen often, but while re-encoding video files via batch file to h265 I'm checking to make sure the audio is in aac. If it isn't then I want to convert to aac, but keep the bit rate at what ever the old file uses since if I just convert to aac ffmpeg is going to use the default 128kbps value. For any old videos I have the …
ffmpeg - Variable bitrate for AAC - how to reach it ...
https://video.stackexchange.com/questions/29116/variable-bitrate-for-aac-how-to-reach-it
Audio ID : 2 Format : AAC LC Format/Info : Advanced Audio Codec Low Complexity Codec ID : mp4a-40-2 Duration : 1 min 26 s Bit rate mode : Variable Bit rate : 75.3 kb/s Maximum bit rate : 142 kb/s Channel(s) : 2 channels Channel layout : L R Sampling rate : 24.0 kHz Frame rate : 23.438 FPS (1024 SPF) Compression mode : Lossy Stream size : 778 KiB (9%) Language : …
audio - ffmpeg + libfdk_aac + vbr => wrong "BitRate_Mode ...
https://video.stackexchange.com/questions/32941/ffmpeg-libfdk-aac-vbr-wrong-bitrate-mode
The issue was caused by ffmpeg/libavformat/movenc.c::mov_write_esds_tag, it can't find max_bitrate. To solve it you should specify audio bitrate -b:a 128k along with -vbr 4. Then mp4's ESDescriptor would have info about max_bitrate and mediainfo and decoders would know that audio stream has variable bitrate mode.
[ffmpeg] why using AAC codec the bitrate is alwais VBR? I ...
https://forum.videohelp.com/threads/391032-%5Bffmpeg%5D-why-using-AAC-codec-the-bitrate-is-alwais-VBR-I-need-CBR
General Complete name : E:\Media\FF\WeaveSample_aac.mp4 Format : MPEG-4 Format profile : Base Media Codec ID : isom (isom/iso2/mp41) File size : 748 KiB Duration : 46 s 998 ms Overall bit rate mode : Constant Overall bit rate : 130 kb/s Writing application : Lavf58.22.100 Audio ID : 1 Format : AAC LC Format/Info : Advanced Audio Codec Low …
Encode/HighQualityAudio – FFmpeg
https://trac.ffmpeg.org/wiki/Encode/HighQualityAudio
ffmpeg -i input.wav -c:a libfaac -q:a 330 -cutoff 15000 output.m4a aac – usable range ≥ 32Kbps (depending on profile and audio). Recommended range ≥ 128Kbps Example of usage: ffmpeg -i input.wav output.m4a libtwolame – usable range ≥ 192Kbps. Recommended range ≥ 256Kbps
FFmpeg Codecs Documentation
https://ffmpeg.org/ffmpeg-codecs.html
8.1 aac. Advanced Audio Coding (AAC) encoder. This encoder is the default AAC encoder, natively implemented into FFmpeg. 8.1.1 Options b. Set bit rate in bits/s. Setting this automatically activates constant bit rate (CBR) mode. If this option is unspecified it is set to 128kbps. q. Set quality for variable bit rate (VBR) mode.
ffmpeg: Add multichannel audio stream (ac3 to aac) - Stack ...
https://stackoverflow.com/questions/67069945/ffmpeg-add-multichannel-audio-stream-ac3-to-aac
I want my first audio stream to be stereo (by default) and my second to be multichannel (5.1 surround) in my .mp4 video. There's no problem in replacing the stereo audio stream, but when I try to add a 5.1 multichannel audio stream to the video, ffmpeg does only take the first two channels (front left and right speakers).
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