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• Can I have time stamps on my screen recording [closed]

  27 décembre 2023, par user23160856

  I have been looking around for a way to add timestamps with dates on my screen records (I am using a Mac and have recorded them via cmd + 5). I ran into an issue of not having timestamps on the recordings which I need for a project and I have to have the timestamps on the vid recordings.

  


  I saw a few places where ffmpeg is a good option. I have managed to install it. However im unsure if theres a way for me to include the timestamps on my previous recording or would I need to record a brand new vid with ffmpeg's screen record options and if yes, I don't see any that boasts of such an option. Hoping someone is able to assist !

  


  I have downloaded ffmpeg and tried this string on a prerecorded screen recording

  


   ffmpeg -i <input /> -vf "drawtext=text=&#x27;%{localtime\:%T}&#x27;" -f flv <output>&#xA;</output>

  


  I was successful but theres 2 issues. I need the date stamp and time stamp. The second issue was that it gave it the time stamp at the current time of conversion and not the time of the recording.

  


  I am fairly new to these aspects and open to learning more !

  


• Scaling Application for video decoding using ffmpeg

  6 juillet 2020, par jasoos

  I am building an application to read multiple IP camera streams (rtsp) and run different Machine Learning Algorithms over it in real time. For each camera stream,

  


  

  1. I spawn an ffmpeg process which continuously break the rtsp streams
into frames and store them as images (JPEG). The streams use H.264
encoding. I am taking 1 frame every second as output.

  


  2. Message queues corresponding to models are given the message
containing location of the file.

  


  3. Models keep on picking up the file and drawing inferences

  


  


  The problem I am facing is the CPU usage by ffmpeg decoding process. For real time inference without any loss of frames, I have to beef up my server by a core for every 2 camera streams. Is there any optimization I am missing for ffmpeg ?

  


  I am using Intel Xeon Gold processor with Ubuntu 18.04 OS

  


• Issue with ffmpeg command : Copying video and audio streams

  27 juillet 2023, par sadra hoseini

  I am trying to use ffmpeg to copy both the video and audio streams from an input file to an output file without any re-encoding. I have used the following command :

  


  ffmpeg -i "file.mp4" -c:v copy -c:a copy "Path.mp4"


  


  However, I'm encountering an issue, and the command doesn't seem to work as expected. The output file is not being generated or the process terminates with an error. I've checked that "file.mp4" exists, and "Path.mp4" is the intended output path.

  


  Could someone please help me identify what might be causing this problem ? Are there any common pitfalls with the -c:v copy and -c:a copy options that I should be aware of ? If there are any alternative approaches to copy both video and audio streams without re-encoding, I'd appreciate learning about those as well.

  


  Thank you for your assistance !