Questions tagged [bitrate]

Bitrate is the number of bits that are conveyed or processed per unit of time.

Bitrate is the number of bits that are conveyed or processed per unit of time.

More information at https://en.wikipedia.org/wiki/Bit_rate

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After transcoding using ffmpeg, I found audio bitrate is not the value I expected

I used ffmpeg to transcode some files into new format and with certain parameters. After transcoding, I found some output file's metadata is not what I expected, the output value is not the same with I set in the cmd line. Before transcoding I check…
penny
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Windows Media Encoder : How to set average bitrate in audio Bitrate-based mode

How to set average bitrate in audio Bitrate-based mode? In Window media encoder SDK, it tell that I must specify average bitrate. Is it using the same audience.SetAudioConfig(0, 2, 44100, 192000, 16); to set the bitrate as CBR?
Prince OfThief
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Cannot record Bitrate-based audio using Windows media encoder

I want to record video from webcam and sound from microphone using Windows Media Encoder. I set a profile to record audio using bitrate-based mode and video using CBR. this.newProfile = new WMEncProfile2(); this.newProfile.ValidateMode…
Prince OfThief
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Audio bitrate sense for byte array

I use mp3spi to read audio files and then convert them to byte array ByteArrayOutputStream baout = new ByteArrayOutputStream(); AudioInputStream sound = AudioSystem.getAudioInputStream(file); byte[] buffer = new byte[4096]; int c; while ((c =…
anatoli
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Converting 32bit wav array to x-bit

I have a 32 bit wav array and I wanted to convert it to 8 bit So I tried to take this function which converts 32 to 16 void _waveIn_DataAvailable(object sender, WaveInEventArgs e) { byte[] newArray16Bit = new byte[e.BytesRecorded / 2]; short…
user779444
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Determining Apple AAC vs. Lossless format using something like Ruby MP4Info gem?

I'm trying to organized music for a radio station and have an iTunes library with a huge number of music files. The files are in various formats (Flac, MP3, AAC, etc.). I need to break all the files up by format. I have a simple Ruby script that…
JohnMetta
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Packet size (mBytesPerPacket) or the bitrate for AAC files in Core Audio

I want to configure a AudioStreamBasicDescription with constant bit rate AAC type. AudioStreamBasicDescription clientFormat = {0}; clientFormat.mSampleRate = 44100.0; clientFormat.mFormatID =…
mbaros
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How to get bitrate for audio file in QT?

Looks like i'm missing something, but I can't figure out how to get bitrate of mp3 file in Qt. I checked QAudioFormat for channels, but still no bitrate value. Correct me if I mistaken, thanks.
htzfun
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mp3 encoding at different bitrates using ffmpy into python

I am trying to convert a .flac audio file into an .mp3 at different bitrates. The simple code is the following: import ffmpy ff = ffmpy.FFmpeg(inputs={'in.flac': None},outputs={'out.mp3': None}) ff.run() Now, since I want my out.mp3, let's say, at…
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Optmizing video for rtmp streaming?

Does anyone know of a guide of how to best optimize video for streaming (RTMP) over the internet? Including optimisation of: bitrate framerate frame size audio p vs i frame proportions Thanks in advance.
user7289
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How to plot the PSNR behavior with respect to the bit-rate for different quality factors and block sizes?

I am learning video processing and I have successfully implemented a video encoder based on JPEG algorithm (for spartial redundancy) and block matching algorithm (for temporal redundancy). Now I am asked to discuss the PSNR behavior with respect to…
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Why the bitrate shown during processing differs so much from the final bitrate after processing using ffmpeg?

Using ffmpeg, why the bitrate shown during processing differs so much from the final bitrate after processing? This command on a 1080p source: ffmpeg -i "$name" -i "$subname" -map 0 -map 1 -vf scale=-1:720 -c:v libx264 -preset veryslow -crf 21 -c:a…
Aspiring Dev
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How to get the resolution and bitrate of a video using YouTube API v3

i'm using the YouTube API v3 on android, but the API seems to have no interface to access the bitrate and resolution of a video.
tshuang
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Twilio bitrate Android

I'm using new twilio library and it works great. Want to know what bitrate is during calls and how to set it. Can't find it at server-side, seems it sets at client-side.
Kyryl Zotov
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Some streams doesn't play on iOS AVPlayer.

I have a weird problem with playing some streams. Those streams don't play, and AVPlayerItem returns the error "Cannot Decode". By inspecting it on different software (ie VLC Media Player), I noticed that the problem is with audio, mean that all…