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• Stream H264 raw data on RTSP server

  1er janvier, par Aitazaz

  I have H264 hex string data saved in a list.
The data is in correct format as it is being received, I am trying to stream it to RTSP server.

  


  I have stream the data in realtime as it is from a dashcam.

  


  The RTSP server is deployed but when I stream frames to it, the connection is created and then ends in an instant (does not last for a second)

  


  The code is mentioned below which performs this streaming task.

  


  def h264_stream_to_rtsp(data_list, rtsp_url):
    try:
        ffmpeg_command = [
            "ffmpeg", 
            "-f", "h264",
            "-i", "-",
            "-vcodec", "libx264",
            "-preset", "fast",
            "-f", "rtsp",
            "-analyzeduration", "5000000",
            "-probesize", "5000000", 
            rtsp_url  # The RTSP URL to stream to
        ]
        
        ffmpeg_process = subprocess.Popen(ffmpeg_command, stdin=subprocess.PIPE)

        for index, hex_data in enumerate(data_list):
            # print(f"Processing hex data {index + 1}/{len(data_list)}...")

            if len(hex_data) % 2 != 0:
                hex_data = '0' + hex_data  # Append a leading zero if length is odd

            binary_data = binascii.unhexlify(hex_data)

            ffmpeg_process.stdin.write(binary_data)

        ffmpeg_process.stdin.close()

        ffmpeg_process.wait()
        print("Stream completed.")

    except KeyboardInterrupt:
        print("Stopping live stream.")
    except Exception as e:
        print(f"Error: {e}")


  


  Logs from the RTSP server are mentioned below :

  


  2025/01/01 10:56:04 INF [RTSP] [conn 20.174.9.78:35474] opened
2025/01/01 10:56:04 INF [RTSP] [session 1d2bb871] created by 20.174.9.78:35474
2025/01/01 10:56:04 INF [RTSP] [session 1d2bb871] is publishing to path 'live', 1 track (H264)
2025/01/01 10:56:04 INF [RTSP] [session 1d2bb871] destroyed: torn down by 20.174.9.78:35474
2025/01/01 10:56:04 INF [RTSP] [conn 20.174.9.78:35474] closed: EOF
2025/01/01 10:56:48 INF [RTSP] [conn 20.174.9.78:54448] opened
2025/01/01 10:56:48 INF [RTSP] [session b6a95e71] created by 20.174.9.78:54448
2025/01/01 10:56:48 INF [RTSP] [session b6a95e71] is publishing to path 'live', 1 track (H264)
2025/01/01 10:56:48 INF [RTSP] [session b6a95e71] destroyed: torn down by 20.174.9.78:54448


  


  How can I stream continuously ?

  


• Split mixed content into sections by scan type using FFmpeg ?

  7 août 2023, par Vivian

  Trying to deinterlace and detelecine "Star Trek : Voyager" and "Star Trek : Deep Space Nine" NTSC DVD rips made using MakeMKV without changing the total number of frames. The videos are a variable frame rate combination of interlaced, telecined, and progressive frames.

  


  I'd like to be able to convert each episode to a sequence of video clips, split by scan type, so I can then feed those individually into Selur's Hybrid for processing, then stitch them back together and feed the reconstructed video into Topaz Video AI.

  


  Is there a way to use FFmpeg to split a video into sections by scan type, and if so, how ?

  


  I've tried automated handling in Hybrid and HandBrake, but both created artifacts and left unfixed issues as a result of applying filters to frames that didn't need them as well as not applying filters to frames that did.

  


• Performance Evaluation of RTX 3080 10G in ffmpeg Transcoding

  26 juin 2023, par JoeLin

  My GPU is RTX 3080 10G ,in ffmpeg , command is :

  


  ffmpeg -loglevel level+info
  
-n -hide_banner -hwaccel cuda -hwaccel_device 0 -hwaccel_output_format cuda
  
-i test.mkv
  
-map 0
  
-c:a copy -preset slow -g 50 -bf 2 -rc:v vbr -cq:v 20 -c:v : h264_nvenc -b:v : 3500k -maxrate:v:0 3500k -bufsize:v:0 7000k -map a:0 -var_stream_map "v:0,a:0,name:1080"
  
"/data/joe/speed/1080_test.mp4"
  
-benchmark

  


  My video file is 3.5G and it takes 27 minutes to execute this command. Can you please tell me if this is within a reasonable range ? By checking the logs, I found that the speed is 7.0x. I would like to know how efficient the transcoding capability of RTX 3080 is and if there are any GPUs with a similar price range that offer better transcoding performance. Alternatively, could there be an issue with my command parameters ? Thank you for your help, guys !

  


  I haven't found similar documentation, so I'm unsure if it's due to an issue with my command