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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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Why is audio bitrate value of ffprobe output higher?

When I check audio bitrate of my video via OS file details, media players or ffprobe -i my_video.mp4, I get the bitrate is 128 kbps. And I want to get more detailed meta information of the video by ffprobe -loglevel 0 -print_format json -show_format…
Tannec
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Need to create a longer version of a video by looping it, all while keeping the frame rate, bitrate, and audio quality. not to mention the resolution

I have this 5 minute long 24fps video, and I need to extend it's length by a factor of some integer number, something like 12, though preferably 24. I need to keep the frame rate the same, which I have achieved through moviepy, but the bit rate has…
YeastTwirler
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Flutter Record (3.0.0) plugin no sound recorded in iOS sometimes

I have tried to record an audio using the Flutter Record plugin(3.0.0) and there was an issue where the recorded files (.aac) of some users didn't have any sound. The bitrate of those files were very low (4478). I haven't set any bitrate from the…
Dinithi De Silva
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GStreamer bitrate does not work the same when implemented in C++ compared to command line get-launch-1.0 (x264enc & omxh264enc)

I encountered different behavior with a gstreamer pipelines when implemented in C++ compared to gst-launch-1.0 execution in command line - the problem is with the bitrate property. Same problem as described bellow in both implementations (C++ &…
LimeLuiz
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Can't get CBR when converting MP4 to Mono MP3

Having read at least a dozen other answers, it seems that the b:a 96k parameter should be producing a MP3 with a constant bitrate (CBR), yet I can only get Variable bitrates. The latest variation of ffmpeg that comes closest is below. I don't…
GDP
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FFMpeg: 2 pass encoding, first with CRF and second with maxrate of first pass average bitrate?

I usually do conversions with ffmpeg 1 pass CRF 22 with maxrate 1400k for some movies to convert them to 720p and generate smallest size with best quality, the parameters I use is: c:v libx264 -vf format=yuv420p,scale=1280:-2 -crf 22 -maxrate 1400k…
Alireza Rinan
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C# AForge VideoFileWriter WriteVideoFrame error

I want to make a app that record video using webcam, I made the logic like get each frame as bitmap and store it to file using AForge VideoFileWriter WriteVideoFrame function, When I open then file using VideoFileWriter Open…
박상욱
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Converting audio files from .wav to mp3 using GNU Parallel

I am trying to convert a full folder of audio files(.wav) to .mp3 by changing the bitrate. The problem is each audio file name consist of multiple '.' and ends with .wav. I am using gnu-parallel to convert the audio signals bitrate and save them as…
blat_spin
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AVI Compression - CBR not configurable

I wrote a C# code that captures video from a video capture card, and writes it in a AVI file. I'm using the XviD encoder (DirectShow). I'm using the IAMVfwCompressDialogs interface to get the configuration form open, and I am also trying to…
Renato Kovarish
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how do I save the videos in an specific bitrate using ffmpeg?

I am trying to save some videos in specific bitrate (8000k) and for this, I used the following code: ffmpeg -i input_1080p60 -c:v libx264 -pix_fmt yuv420p -b:v 8000K -bufsize 8000K -minrate 8000K -maxrate 8000K -x264opts…
david
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writing a video without any loss in data or bitrate - opencv (python)

I am trying to write a video file without any loss in OpenCV, but so far any codec that I have selected from fourcc codec lists somehow results in loss of data. regarding the recording parameters I am using: fps =…
Amirez
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How to change the bit rate of audio while converting from midi file to mp3 using ffmpeg/fluidsynth

I am trying to convert midi file to mp3 using fluidsynth and ffmpeg on Windows 10 OS. fluidsynth -a alsa -T raw -F - "FluidR3Mono_GM.sf3" simple.mid | ffmpeg -ab 192k -f s32le -i simple.mp3 The audio bit rate specification : -ab 192k or -b:a…
Vinod
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html5 video / video.js : Are bitrates consistent among devices?

I have a video streaming player and get back an array of available video quality bitrates for a stream. I am trying to set up a custom url param override to set the bitrate but unsure if I should actually use the bitrate number itself. On a test…
user15909643
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Is there anyway to reduce the bitrate of cv2.VideoWriter live camera record video?

I have a python project that reads frames from a ip_camera and writes it in a .avi video, but its size is becomes too large for example a 1 min record has a size about 200 MB. I want to reduce the video bitrate to reduce the size at same time that…
Mohammad Hakimi
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Plotting PSNR vs BITRATE

I wonder if there is any available code in python or MATLAB in order to plot the psnr Vs Bitrate diagram ? I've found a lot of questions published on the internet but none of them try to explain the process of this job
Ouismed
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