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• Museum of Multimedia Software, Part 4

  20 août 2010, par Multimedia Mike — Software Museum

  This is the last part of the series, at least until some more multimedia software shows up at my favorite thrift shop or the other boneyards I scavenge.

  Miscellaneous Multimedia Programs
  This set includes the titles Matinee FMV Screensaver, MetaCreations Painter Classic, and Multimedia JumpStart. The second one is likely a creation program. I have no idea what the third one is, while the first title gives me chills just thinking about the implications.

  
  
  

  Miscellaneous Creativity Software
  Magic Theatre and Microsoft Home : Creative Writer. I think I loaded up the former once to find a very basic animation program. The latter isn’t necessarily multimedia-related but certainly classifies as creative software. It also reminds me of the ad I once spied in Entertainment Weekly magazine during the mid-1990s for a Microsoft music history CD-ROM. MS branched out into all kinds of niches.

  
  
  

  More Multimedia Creativity Software
  VideoCraft and U-Create Games & Animation. I wager these would be fun to play around with if I had the time.

  
  
  

  Showcase CD-ROMs
  "What Can You Make ? Showcase 7" from Macromedia and Microsoft Multimedia Pack 10.

  
  
  

  Basic Multimedia Software Discs
  As a multimedia nerd, these Apple QuickTime and Microsoft Video for Windows discs make me sentimental.

  
  
  

  Real Software Collection
  Grit your teeth and gaze upon CD-ROM distributions of Real’s software. There is a RealAudio disc back from when Real still called themselves Progressive Networks. "Everything you need to hear the web roar !"

  
  
  

  Clips
  And a few multimedia clip CD-ROMs, along with a disc that promises to test and tune your MPC setup.

  
  
  

  Wrap-Up
  I would be remiss if I neglected to mention a few more pieces of multimedia creation software in my collection. First, there’s the Barbie Storymaker. I actually gave that one a go, as you can tragically see from that link. Further, the Taco Bell fast food restaurant chain ran, as one of their many kids meal promotions, a series of 4 simple Comics Constructor CD-ROMs. I played briefly with it here and again during an exploration of XML data formats and the parsing thereof (which the software uses).

• How to record depth stream from realsense L515

  22 avril 2022, par Bilal

  I have a depth camera (Intel Realsense L515) and I do like to record a video of the depth.

  


  I have seen this answer which is using FFMPEG, but I didn't know how to replicate it in my case !

  


  I'm using this code :

  


  import cv2
import numpy as np
import pyrealsense2 as rs
import time

pipeline = rs.pipeline()
config = rs.config()

"""
# Depth Mode
"""
# Resolution
res = [(1024, 768), (640, 480), (320, 240)]
resolution = res[0]
print("RealSense Resolution:{}\n".format(resolution))

# # initialize video writer
fourcc = cv2.VideoWriter_fourcc('F','F','V','1')
fps = 30
video_filename = 'output.avi'
out = cv2.VideoWriter(video_filename, fourcc, fps, resolution, False)


config.enable_stream(rs.stream.depth, resolution[0], resolution[1], rs.format.z16, 30)
profile = config.resolve(pipeline)
# Start streaming
pipeline.start(config)

# Declare sensor object and set options
depth_sensor = profile.get_device().first_depth_sensor()
depth_sensor.set_option(rs.option.visual_preset, 5) # 5 is short range, 3 is low ambient light
depth_sensor.set_option(rs.option.receiver_gain, 8)
depth_sensor.set_option(rs.option.pre_processing_sharpening, 0.0)
depth_sensor.set_option(rs.option.post_processing_sharpening, 3.0)
depth_sensor.set_option(rs.option.laser_power, 100)
depth_sensor.set_option(rs.option.confidence_threshold, 2)
# Get the sensor once at the beginning. (Sensor index: 1)

# # Filters
threshold_filter = rs.threshold_filter(min_dist=1.2, max_dist=1.4)
temporal_filter = rs.temporal_filter(smooth_alpha=0.1, smooth_delta = 9.0,persistence_control=7)

try:
    # # Filters
    threshold_filter = rs.threshold_filter(min_dist=1.2, max_dist=1.4)
    temporal_filter = rs.temporal_filter(smooth_alpha=0.1, smooth_delta = 75.0,persistence_control=0)

    tic = time.time()

    while True:
        # Wait for depth frames:
        frames = pipeline.wait_for_frames()
        depth_frame = frames.get_depth_frame()
        if not depth_frame:
            continue

        #------------
        # # FILTERS |
        #------------

        depth_frame = threshold_filter.process(depth_frame)
        depth_frame = temporal_filter.process(depth_frame)

        # Convert images to numpy arrays
        depth_array = np.asanyarray(depth_frame.get_data())
        # depth_array = np.asanyarray(colorizer.colorize(depth_frame).get_data())

        out.write(depth_array)
        toc = time.time()
        if(round(toc  - tic) > 30):
            break

finally:
    out.release()
    pipeline.stop()


  


  And getting this error :

  


  


  out.write(depth_array)
cv2.error : OpenCV(4.5.4) /tmp/pip-req-build-kneyjnox/opencv/modules/videoio/src/cap_ffmpeg.cpp:186 : error : (-215:Assertion failed) image.depth() == CV_8U in function 'write'

  


  


  Can you please tell me how can I record the depth from my camera ? thanks in advance.

  


• Splitting m4a into multiple files with ffmpeg

  16 juillet 2020, par ARuiz

  I have an audio file (.m4a) and want to split it into smaller pieces using ffmpeg. All answers I have seen do something along one of the following two possibilities :

  


  

  1. ffmpeg -i inputFile -map 0 -f segment -segment_time 60 -c copy "$output%03d.m4a

  


  


  or

  


  

  2. ffmpeg -i inputFile -acodec copy -ss start_time -to end_time outputFile

  


  


  With 1. the first file is fine. From the second file on, I just get a minute of silence in quicktime, and in VLC the file plays but the timing is odd : for example the second file should have second 0 equals to second 60 in the original file. However in vlc it starts playing on second 60 and goes on to second 120.

  


  With 2. I have to set start times and end for each file, unfortunately I notice a small jump when I play one after the other, so it seems as if some miliseconds are lost.

  


  There are definitely a few old questions asked around this, but none of them actually helped me with this.