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• FFMPEG unable to loop overlay input image for dynamic image overlay

  15 septembre 2017, par Mahi

  I am trying to loop an image in images/logo.png(for ex).

  I am using php laravel to create dynamic images and overwriting it into images/logo.png.

  My ffmpeg code

  ffmpeg -y -listen 1 -i rtmp://192.168.33.11:1935/live/mp4test  -loop 1  -f image2 -i image/logo.png -filter_complex "[0:v]scale=1024:-1,setpts=PTS-STARTPTS[stream];[1:v]scale=120:-1,setpts=PTS-STARTPTS[logo] ; [stream][logo]overlay=W-w-10:H-h-10,format=yuv420p[out]" -map "[out]" -map 0:a:0 -hls_time 10 -hls_list_size 6 -start_number 1 stream.m3u8

  This code works fine if I generate dynamic image using

  until test ; do convert -size 200x100 xc:White -gravity Center  -weight 700 -pointsize 12  -annotate 0 "<code>date" /usr/local/nginx/html/stream/test_stream/datex.png ; mv /usr/local/nginx/html/stream/test_stream/datex.png /usr/local/nginx/html/stream/test_stream/image/logo.png ; sleep 1 ; done

  This script just generates a image with current time stamp and moves it into images/ as logo.png . And this works absolutely fine.

  But when I using my laravel application generate a file move it into images/ ffmpeg starts dropping all the frames.

  Please suggest me a solution.

• Evolution of Multimedia Fiefdoms

  1er octobre 2014, par Multimedia Mike — General

  I want to examine how multimedia fiefdoms have risen and fallen through the years.

  
  
  

  Back in the day, the multimedia fiefdoms were built around the formats put forth by competing companies : there was Microsoft/WMV, Apple/MOV, and Real/RM as the big contenders. On2 always wanted to be a player in this arena but could never quite catch a break. A few brave contenders held the line for open source and also for the power users who desired one application that could handle everything (my original motivation for wanting to get into multimedia hacking).

  The computer desktop was the battleground for internet-based media stream. Whatever happened to those days ? Actually, if memory serves, Flash-based video streaming stepped on all of them.

  Over the last 6-7 years, the battleground has expanded to cover mobile devices, where Flash’s impact has… lessened. During this time, multimedia technology pretty well standardized on a particular stack, namely, the MPEG (MP4/H.264/AAC) stack.

  The belligerents in this war tried for years to effectively penetrate new territory, namely, the living room where the television lived. This had been slowgoing for years due to various user interface and content issues, but steadily improved.

  Last April, Amazon announced their entry into the set-top box market with the Fire TV. That was when it suddenly crystallized for me that the multimedia ecosystem has radically shifted. Now, the multimedia fiefdoms revolve around access to content via streaming services.

  Off the top of my head, here are some of the fiefdoms these days (fiefdoms I have experience using) :

  • Netflix (subscription streaming)
  • Amazon (subscription, rental, and purchased streaming)
  • Hulu Plus (subscription streaming)
  • Apple (rental and purchased media)

  I checked some results on Can I Stream.It ? (which I refer to often) and found a bunch more streaming fiefdoms such as Google (both Play and YouTube, which are separate services), Sony, Xbox 360, Crackle, Redbox Instant, Vudu, Target Ticket, Epix, Sony, SnagFilms, and XFINITY StreamPix. And surely, these are probably just services available in the United States ; I know other geographical regions have their own fiefdoms.

  What happened ?

  When I got into multimedia hacking, there were all these disparate, competing ecosystems. As a consumer, I didn’t care where the media came from, I just wanted to play it. That’s what inspired me to work on open source multimedia projects. Now I realize that I have the same problem 10-15 years later : there are multiple competing ecosystems. I might subscribe to fiefdoms X and Y, but am frustrated to learn that something I’d like to watch is only available through fiefdom Z. Very few of these fiefdoms can be penetrated using open source technology.

  I’m not really sure about the point about this whole post. Multimedia technology seems really standardized these days. But that’s probably just my perspective because I have spent way too long focusing on a few areas of multimedia technology such as audio and video coding. It’s interesting that all these services probably leverage the same limited number of codecs. Their differentiation comes from the catalog of content that each is able to license for streaming. There are different problems to solve in the multimedia arena now.

• How to achieve real time video editing on Android ?

  3 octobre 2024, par Itamar

  I've been working recently on a video-editing-related project on Android, and am desperately looking for resources related to video editing on the platform.

  


  The only video-editing related "method" or information I could find was using the FFmpeg library, which is pretty rich in features and capabilities but works really slow, operations such as reversing a 10-second video can take as long as 30 seconds, which delivers a really poor user experience.

  


  That being said, it seems that there are tons of Android video-editing apps that are capable of doing everything FFmpeg can, only in almost immediate periods of time (apps such as InShot, PocketVideo or even the previous musical.ly TikTok).

  


  I've tried researching and searching for information on the topic in almost any reasonable place (Google, GitHub, YouTube, the Android developer center, and even on "support" pages of the above-mentioned apps) to no avail (no explanatory documents, no open source libraries, not even demo apps), if anyone could shed some light on the subject that would be much, much appreciated !

  


  Thanks.