249 questions
0 votes
1 answer
255 views
Testing with public iPerf3 server results in bad performance
I am trying to measure the impact my application has on my network. For this to work, I want to run a network test with a public iPerf3 server to see the difference (baseline vs application running). ...
1 vote
1 answer
88 views
Can VLC's method for estimating the duration of a video be reproduced by the means of ffmpeg?
This may seem to duplicate previous questions but it does not, as far as I can tell. I have a bash script for indexing images and videos to a thumbnails database. A user of my script complained that ...
1 vote
2 answers
142 views
Why iPerf3 bitrate difference between single stream and multiples
Why do I get such a difference in Bitrate with iPerf when running a single connection compared to running 10 simultaneous connections? When I run iPerf with 10 simultaneous connections: iperf3 -p ...
0 votes
0 answers
98 views
How should I calculate bit rate using mediainfo?
I'm writing code to parse the JSON output of mediainfo, to get various specs including the video bit rate. Trying mediainfo for a DVD, it reports over 100 tracks (there seem to be lots of extras on ...
0 votes
0 answers
197 views
Media3 Transformer increases bitrate
I want to encode videos using media3 transformers API, it works correctly but output bitrate bigger than input bitrate. Although I am using the reducing frame rate, resolution, bitrate but it not ...
1 vote
0 answers
108 views
Trouble Retrieving Real-Time Input Bitrate from RTSP Streams in WinForms App Using Vlc.DotNet Player
I'm currently working on a WinForms application that plays multiple RTSP streams from IP cameras, with one stream per camera. I'm utilizing the Vlc.DotNet player to display these streams. While the ...
-2 votes
1 answer
339 views
Why does ffmpeg completely ignore my -b:v bitrate flag? [closed]
Running on MacOS. I am trying to specify a bitrate using the -b:v flag in FFMPEG, but it seems to be completely ignored in the output file. The command I am running is: ./ffmpeg -i ./input.mov -c:v ...
0 votes
1 answer
2k views
How to calculate real bitrate of incoming rtsp stream with GStreamer?
Is there any way to calculate real bitrate of incoming RTSP stream? I've used "current-level-bytes" property of queue element, but result was unacceptable. I've also tried ...
1 vote
0 answers
482 views
How to control resolution and bitrate of an ONVIF IP camera?
My CCTV View in C# allows visualizing screens from 1 to 36. However, if all 36 cameras are connected it becomes slow. Therefore I want to create a function to adjust the resolution and bitrate for ...
2 votes
1 answer
1k views
Length of video created with PyAV
When creating a video from a list of frames at an assigned framerate using PyAV, the videos end up being shorter that expected by a few seconds, while the framerate in the video metadata is correct. ...
0 votes
0 answers
235 views
How to modify the bit_rate of AVFormatContext?
Hello,I would like to know how to modify the bit_rate of AVFormatContext. Here is the minimal reproducible example.This is a simple process for pushing rtmp video streams.Now I want to control the ...
-1 votes
2 answers
2k views
How can I record a video of the shader screen with high bitrate from ShaderToy? [closed]
I've wrote a noisy shader in ShaderToy that I want to record a video from. ShaderToy provides this option but it captures the screen with very low bitrate. Is there any opportunity to get the video in ...
2 votes
1 answer
278 views
How to know the byte offset of a specific CBR MP3 frame?
I created my own MP3 frame parser. I can read each frame individually if I do it sequentially. My problem is that I have yet to figure out how to find the byte offset of the nth frame (without having ...
0 votes
0 answers
96 views
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 ...
0 votes
2 answers
1k views
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 ...