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• How to convert ffmpeg raw stdout to video

  20 juin 2018, par Данил Вагапов

  I use ffmpeg to capture video from my webcam and stream it via netcat.

  ffmpeg -f v4l2 -r 25 -s 640x480 -i /dev/video0 -f avi pipe:1 | nc -l -p 5000

  I wanna display the stream on my surface view, but I still don’t know how to do it.
  I use socket to get the data from netcat.
  What’s the simpliest way to convert and display this data ?

• FFMPEG realtime streaming using a remote m3u8

  8 avril 2016, par JJ The Second

  Good morning chaps,

  I’ve been doing a long term research to do DRM solution for my client and we are almost there, here is what we’d like to achieve and please accept my lack of understanding, Im well new to FFMPEG and there are so many questions already asked but I’m not sure if they cover my questions.

  Objectives :

  1- To record and stream (real-time) m3u8 from a remote server : We have access to more than 3000 HLS streams (b2b project) therefore we would need to record and stream m3u8 in real-time. Currently I am able to record to mp4 or mkv but don’t understand how to stream real time

  2- Stream using HL264 : We would need to make sure streams play on all devices, based on my understanding this is the correct format to use, is this correct, more than happy to hear your comments

  3- Delivery to be in 3 different resolutions, HD, 488 and 380 : This is all about sizes, it is unlikely that my users would stream using mobile devices (GA says only 32000 using mobile) but still I need to make sure there are no restrictions to users

  Questions :

  1- I’ve seen lots of tutorials with regards to recording m3u8, converting to mp4 or .ts files, so I’m not sure how this works, do I need to export my recording to .ts files and merge them again ? If this is the case, isn’t this going to have delay in streaming ?

  2- By doing this, am I using my bandwidth or source of m3u8 ?

  3- If converting to .ts then would you please let me know how I can achieve this ?

  Please note, my recording are (for now) all m3u8 and I need to stream as m3u8 at the same time.

  I have latest version of FFMPEG installed on Ubuntu 14.4 TLS

  Thank you all in advance and happy Friday !

• Android apk file too big when using FFMPeg encoder library

  9 novembre 2022, par Diego Perez

  I'm developing an app which creates x264 videos with the following library :

  



  com.arthenica:mobile-ffmpeg-full:4.2.2.LTS


  



  but the result apk file is too big ( 71mb), so I tried :

  



  com.arthenica:mobile-ffmpeg-min-gpl:4.2.2.LTS


  



  and this way, as the library downloads only a few codecs -included the ones I need- apk size was reduced to 49mb, what is much better, but still looks too big to me, so I'd need to know if any of you know a better way to reduce apk size, because people generally refuse to download such big apps

  



  Regarding the rest of the app (drawables, resources and so) they're well optimized, because if I remove this library and rebuild, the size of the app drops to 10mb

  



  I was reading this question :
FFMPEG Android Library Increase Size

  



  and user S.R suggests to compress all cpu architecture models in one archive file and extract target cpu lib based on cpu model on app's directory and load ffmpeg from there, but I really don't know how to do that.

  



  I'm checking my app's folder structure and noticed there are this next folders regarding ffmpeg lib :

  



  arm64-v8a => ~16mb
armeabi-v7a => ~29mb
x86 => ~17mb
x86_64 => ~21mb


  



  But not sure if I could remove any of them, and as you can see armeabi-v7a is the largest.