I'm studying to collect RTSP stream's video information
Codec, Frame rate, resolution, bitrate, etc.
But i can't find How to get realtime RTSP stream's bitrate.
What is formula of RTSP stream's bitrate??
I googled that. but i can't find it. It was just formula for saved video's bitrate or network bitrate.
please help me
A picture that explains the answer I want
I want to make music recommendation system based on multimodal dataset. Ive been looking for publicly available dataset but I couldn't find it anywhere . I want to know where will I get multimodal dataset for music or book ?
I watched many YOUTUBE videos but didn't find any video where they are teaching how to create multimodal dataset.
This video clip:
https://www.youtube.com/watch?v=wc0PB6Azwn0
What is the max audio bitrate and how to detect real audio bitrate? is it the same? Please no rumors and no guessing.
Does it depend on the video quality I am watching (1080p, 720p, etc)?
If you say - yes, it makes no sense, because the clip was uploaded at one bitrate only.
Hope, someone who knows the subject can answer that questions.
Is it possible to detect the audio bitrate from YouTube video at all?
Stats for nerds is useless, it shows no audio bitrate.
Taking consideration lossy (vs lossless) audio max is 320 Kbps, it cannot be higher than that by definition.
Anyone who knows?
You can use the command line tool youtube-dl to list all available transcodings for a given YouTube video by running youtube-dl -F <url-to-your-video>.
Example output using the URL mentioned in your question:
Studying the output we can see that the audio transcoding with the highest bitrate is "format 251" using the opus codec at an average bitrate of around 145k. Note that YouTube is not using a fixed bitrate but rather a variable bitrate with target of ~160k.
The opus codec is currently supported in most modern browsers (but not Safari). Browsers without support for opus will fallback to the m4a stream at a variable bitrate targeting ~128k.
If you want to make 100% sure which audio transcoding you're currently listening to, you can right click the YouTube video player and select "Stats for nerds" and look for the number mentioned in the codecs section and cross-reference that with the output given by youtube-dl:
Does it depend on the video quality I am watching (1080p, 720p, etc)? If you say - yes, it makes no sense, because the clip was uploaded at one bitrate only.
Yes, it depends on video quality. When you're choosing a video quality, you're not just choosing the video quality... you're choosing the audio quality as well. YouTube isn't giving you the option, but it's part of the package.
Videos aren't served as-is, they're transcoded. You upload your video and it's re-compressed at a variety of different bitrates with different settings.
Your audio bitrate depends on what YouTube decided to encode it as. Each video may have many versions of the stream.
The best thing you can do is get a build of FFmpeg with libquvi enabled, and let it parse the page, find the streams, download the stream, demux, and figure things out for you from there.
Taking consideration lossy (vs lossless) audio max is 320 Kbps, it cannot be higher than that by definition.
Your definition is wrong. There are all kinds of lossy audio codecs, and they can be ran at a variety of bitrates.
How can I speed up video encoding (VideoWriter) and decoding (VideoCapture) in opencv? Can I use TBB (threading building blocks) library?
I am working with 1280x720 (720p) video and developing a real-time system but my video frame reading and writing alone are consuming 35 ms per frame. Please help.
Is it possible to read the spectrum data from the currently playing track in iOS? For example, to make an equalizer similar to the one in iTunes?
Apple has a sample program, "aurioTouch," which can display time and frequency domain waveforms.
http://developer.apple.com/library/ios/#samplecode/aurioTouch/Introduction/Intro.html