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• How to debug missing shared library (libffmpeg.so) while running Electron App (LBRY-Desktop) on FreeBSD Linuxulator ?

  13 septembre 2021, par xliiv

  I'm working on running an Electron Linux App on FreeBSD, namly
lbry-desktop.

  


  I did this

  


  


  1. download https://github.com/mrclksr/linux-browser-installer

     


  


  2. run from FreeBSD

     


     sudo ./linux-browser-installer chroot create
sudo chroot /compat/ubuntu/ /bin/bash


     


  


  3. run from chroot/ubuntu

     


     apt install --yes wget
cd /root
wget https://github.com/lbryio/lbry-desktop/releases/download/v0.51.2/LBRY_0.51.2.deb
apt install --yes ./LBRY_0.51.2.deb
rm /var/lib/dpkg/info/libfprint-2-2\:amd64.postinst
apt install --yes ./LBRY_0.51.2.deb


     


  


  4. back to FreeBSD

     


     > /compat/ubuntu/opt/LBRY/lbry


     


  


  


  I'm getting this

  


  /compat/ubuntu/opt/LBRY/lbry: error while loading shared libraries: libffmpeg.so: cannot open shared object file: No such file or directory
fish: Job 1, '/compat/ubuntu/opt/LBRY/lbry' terminated by signal SIGTRAP (Trace or breakpoint trap)


  


  I did some debugging, but can't get it thru.

  


  My conclusion is, it should work, since

  


  

  1. ffmpeg.so is present


     > ll /compat/ubuntu/opt/LBRY/
total 195691
-rw-r--r--  1 root  wheel   1.0K Aug 20 16:22 LICENSE.electron.txt
-rw-r--r--  1 root  wheel   4.5M Aug 20 16:22 LICENSES.chromium.html
-rwsr-xr-x  1 root  wheel   6.0M Aug 20 16:22 chrome-sandbox
-rw-r--r--  1 root  wheel   176K Aug 20 16:22 chrome_100_percent.pak
-rw-r--r--  1 root  wheel   314K Aug 20 16:22 chrome_200_percent.pak
-rw-r--r--  1 root  wheel    10M Aug 20 16:22 icudtl.dat
-rwxr-xr-x  1 root  wheel   122M Aug 20 16:22 lbry
-rwxr-xr-x  1 root  wheel   238K Aug 20 16:22 libEGL.so
-rwxr-xr-x  1 root  wheel   8.5M Aug 20 16:22 libGLESv2.so
-rwxr-xr-x  1 root  wheel   3.0M Aug 20 16:22 libffmpeg.so
-rwxr-xr-x  1 root  wheel   4.3M Aug 20 16:22 libvk_swiftshader.so
-rwxr-xr-x  1 root  wheel   8.1M Aug 20 16:22 libvulkan.so
drwxr-xr-x  2 root  wheel    55B Sep  6 13:04 locales
drwxr-xr-x  4 root  wheel     5B Sep  6 13:04 resources
-rw-r--r--  1 root  wheel   4.6M Aug 20 16:22 resources.pak
-rw-r--r--  1 root  wheel    49K Aug 20 16:22 snapshot_blob.bin
drwxr-xr-x  2 root  wheel     4B Sep  6 13:04 swiftshader
-rw-r--r--  1 root  wheel   167K Aug 20 16:22 v8_context_snapshot.bin
-rw-r--r--  1 root  wheel   107B Aug 20 16:22 vk_swiftshader_icd.json
> strings /compat/ubuntu/opt/LBRY/lbry|rg libffmpeg\.so
libffmpeg.so


     


  


  


  Also, from chroot

  


  root@alef14:~# ldd /opt/LBRY/lbry |grep ffmpeg
        libffmpeg.so => /opt/LBRY/libffmpeg.so (0x0000000808e00000)


  


  So I'm missing something, but can't find it.

  


  How can I debug/solve it ?

  


  Running the program from /compat/ubuntu/opt/LBRY/ dir, doesn't work as well.

  


• Problems using Cuda for video transcoding [closed]

  19 août 2022, par Jay Adlard

  I just bought a new pc as my faithful old windows 7 i7 laptop died. Now the laptop had both intel and nvidea gtx660m chips. When I transcoded video with handbrake the intel graphics managed 8fps when I changed over to the nvidia it managed 80fps and the graphics card got nice and hot so was obviously working.

  


  The new machine i bought is a i9 with an nvidea gtx780 running windows 10. When I tried to transcode some video hoping for it to use the cpu and Gpu but no joy,the card stays cool power usage is only a handful of watts higher than it running something simple.I had been using handbrake but I read it doesn’t support Cuda so why the laptop speeded up I don’t know. A friend of mine that is into ffmpeg came round found that ffmpeg reports no Cuda yet the card works fine in every other respect. Unlike the rest of the machine the graphics card wasn’t new but it looked like new…

  


  One thing to note I am not talking about nvenc as the quality is rather poor, no point in capturing uncompressed files cleaning them up and not using an encoder that will do 2 pass and an exhaustive search.
Can anyone recommend a reasonably priced encoder that will use the Cuda cores ?

  


  Has anyone got any idea what the problem is ?

  


• Demo of WebM Running on TI OMAP 4 Processor

  15 octobre 2010, par noreply@blogger.com (John Luther)

  Texas Instruments has made a video of HD-resolution (1080p) VP8 (WebM) video playing on their new TI OMAP™ 4 processor, in both Android and Ubuntu.

  (If you have a WebM-enabled browser and are enrolled in the YouTube HTML5 beta the video will play in WebM HTML5, otherwise it will play in Flash Player.)

  For more info about the OMAP 4 and the IVA 3 video accelerator that enables low-power HD playback of VP8 on the chip, see the TI web site.