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Illegal instruction when attempting tu run ffmpeg in mipsel arch under WDTV device (with the wdlxtv firmware) #172

Closed gevialex closed 7 years ago

gevialex commented 7 years ago

Hi, I really like optware-ng, helps to add some more functionality to my WD TV Live PLus device :) I'm getting an "Illegal instruction" message when trying to run ffmpeg or ffprobe or ffserver in the mipsel arch in my wdtv (wdlxtv firmware). Other software downloaded via ipkg from the optware-ng repo appears to run fine. Any ideas or things I could check to assist? Thanks a lot Cheers Alex

alllexx88 commented 7 years ago

Hi @gevialex I can't reproduce it on my mipsel ASUS RT-N66U. What's the output of:

uname -a
strace ffmpeg

If strace is missing, install it via ipkg

Thanks

gevialex commented 7 years ago

Hi there thanks for the reply,

I've pasted the commands and outputs at this site

http://paste.ofcode.org/35EgNU76etSg9Ad4M8HdFcg

Cheers Alex

From: alllexx88 notifications@github.com Sent: Sunday, December 4, 2016 9:57 AM To: Optware/Optware-ng Cc: gevialex; Mention Subject: Re: [Optware/Optware-ng] Illegal instruction when attempting tu run ffmpeg in mipsel arch under WDTV device (with the wdlxtv firmware) (#172)

Hi @gevialexhttps://github.com/gevialex I can't reproduce it on my mipsel ASUS RT-N66U. What's the output of:

uname -a strace ffmpeg

If strace is missing, install it via ipkg

Thanks

- You are receiving this because you were mentioned. Reply to this email directly, view it on GitHubhttps://github.com/Optware/Optware-ng/issues/172#issuecomment-264694447, or mute the threadhttps://github.com/notifications/unsubscribe-auth/APdNMEbkYv89S3TpR2I88YnZ2HfnYI_Fks5rEo5_gaJpZM4K9Mm-.

alllexx88 commented 7 years ago

@gevialex nothing in strace output catches the eye for me... So we'll have to use gdb. Please do this:

ipkg update
ipkg upgrade
ipkg install -force-overwrite gdb

then, we'll need unstripped binaries for sensible gdb output. I've created a tarball with unstripped uclibc-ng, ffmpeg, and all recursive lib dependencies, do this to install (this will overwrite stripped binaries, installed using ipkg):

cd /tmp
wget http://ipkg.nslu2-linux.org/optware-ng/testing/ffmpeg%2Bdeps-unstripped.tar.bz2
tar -C / -xjvf ffmpeg+deps-unstripped.tar.bz2

finally, launch gdb:

gdb ffmpeg
run
(ffmpeg crashes here)
bt full

I hope that the proper backtrace output you should get after this will shed some light on what's wrong

Alex

gevialex commented 7 years ago

Hey,

I copied the output of gdb in the link below, just a comment, the ffmpeg%2Bdeps-unstripped.tar.bz2 file is actually a tar.gz file, but named as tar.bz2.

Link to the gdb output:

https://jpst.it/Q3fT

Thanks

From: alllexx88 notifications@github.com Sent: Sunday, December 4, 2016 1:00 PM To: Optware/Optware-ng Cc: gevialex; Mention Subject: Re: [Optware/Optware-ng] Illegal instruction when attempting tu run ffmpeg in mipsel arch under WDTV device (with the wdlxtv firmware) (#172)

@gevialexhttps://github.com/gevialex nothing in strace output catches the eye for me... So we'll have to use gdb. Please do this:

ipkg update ipkg upgrade ipkg install -force-overwrite gdb

then, we'll need unstripped binaries for sensible gdb output. I've created a tarball with unstripped uclibc-ng, ffmpeg, and all recursive lib dependencies, do this to install (this will overwrite stripped binaries, installed using ipkg):

cd /tmp wget http://ipkg.nslu2-linux.org/optware-ng/testing/ffmpeg%2Bdeps-unstripped.tar.bz2 tar -C / -xjvf ffmpeg+deps-unstripped.tar.bz2

finally, launch gdb:

gdb ffmpeg run (ffmpeg crashes here) bt full

I hope that the proper backtrace output you should get after this will shed some light on what's wrong

Alex

- You are receiving this because you were mentioned. Reply to this email directly, view it on GitHubhttps://github.com/Optware/Optware-ng/issues/172#issuecomment-264702615, or mute the threadhttps://github.com/notifications/unsubscribe-auth/APdNMCHgBl_t9aUVzU0PpZ3xw9Ee9tQ9ks5rErl_gaJpZM4K9Mm-.

gevialex commented 7 years ago

Hi Alex,

just wondering if you got my last mail with the gdb ffmpeg output.

Thanks

Regards

(The other) Alex

From: Alex M gevi_alex@hotmail.com Sent: Monday, December 5, 2016 12:26 AM To: Optware/Optware-ng Subject: Re: [Optware/Optware-ng] Illegal instruction when attempting tu run ffmpeg in mipsel arch under WDTV device (with the wdlxtv firmware) (#172)

Hey,

I copied the output of gdb in the link below, just a comment, the ffmpeg%2Bdeps-unstripped.tar.bz2 file is actually a tar.gz file, but named as tar.bz2.

Link to the gdb output:

https://jpst.it/Q3fT

Thanks

From: alllexx88 notifications@github.com Sent: Sunday, December 4, 2016 1:00 PM To: Optware/Optware-ng Cc: gevialex; Mention Subject: Re: [Optware/Optware-ng] Illegal instruction when attempting tu run ffmpeg in mipsel arch under WDTV device (with the wdlxtv firmware) (#172)

@gevialexhttps://github.com/gevialex nothing in strace output catches the eye for me... So we'll have to use gdb. Please do this:

ipkg update ipkg upgrade ipkg install -force-overwrite gdb

then, we'll need unstripped binaries for sensible gdb output. I've created a tarball with unstripped uclibc-ng, ffmpeg, and all recursive lib dependencies, do this to install (this will overwrite stripped binaries, installed using ipkg):

cd /tmp wget http://ipkg.nslu2-linux.org/optware-ng/testing/ffmpeg%2Bdeps-unstripped.tar.bz2 tar -C / -xjvf ffmpeg+deps-unstripped.tar.bz2

finally, launch gdb:

gdb ffmpeg run (ffmpeg crashes here) bt full

I hope that the proper backtrace output you should get after this will shed some light on what's wrong

Alex

- You are receiving this because you were mentioned. Reply to this email directly, view it on GitHubhttps://github.com/Optware/Optware-ng/issues/172#issuecomment-264702615, or mute the threadhttps://github.com/notifications/unsubscribe-auth/APdNMCHgBl_t9aUVzU0PpZ3xw9Ee9tQ9ks5rErl_gaJpZM4K9Mm-.

alllexx88 commented 7 years ago

Hi Alex Sorry, very busy this week, will look at the log as soon as I have some free time

Alex

8 груд. 2016 р. 15:51 "gevialex" notifications@github.com пише:

Hi Alex,

just wondering if you got my last mail with the gdb ffmpeg output.

Thanks

Regards

(The other) Alex

From: Alex M gevi_alex@hotmail.com Sent: Monday, December 5, 2016 12:26 AM To: Optware/Optware-ng Subject: Re: [Optware/Optware-ng] Illegal instruction when attempting tu run ffmpeg in mipsel arch under WDTV device (with the wdlxtv firmware) (#172)

Hey,

I copied the output of gdb in the link below, just a comment, the ffmpeg%2Bdeps-unstripped.tar.bz2 file is actually a tar.gz file, but named as tar.bz2.

Link to the gdb output:

https://jpst.it/Q3fT

Thanks

From: alllexx88 notifications@github.com Sent: Sunday, December 4, 2016 1:00 PM To: Optware/Optware-ng Cc: gevialex; Mention Subject: Re: [Optware/Optware-ng] Illegal instruction when attempting tu run ffmpeg in mipsel arch under WDTV device (with the wdlxtv firmware) (#172)

@gevialexhttps://github.com/gevialex nothing in strace output catches the eye for me... So we'll have to use gdb. Please do this:

ipkg update ipkg upgrade ipkg install -force-overwrite gdb

then, we'll need unstripped binaries for sensible gdb output. I've created a tarball with unstripped uclibc-ng, ffmpeg, and all recursive lib dependencies, do this to install (this will overwrite stripped binaries, installed using ipkg):

cd /tmp wget http://ipkg.nslu2-linux.org/optware-ng/testing/ffmpeg% 2Bdeps-unstripped.tar.bz2 tar -C / -xjvf ffmpeg+deps-unstripped.tar.bz2

finally, launch gdb:

gdb ffmpeg run (ffmpeg crashes here) bt full

I hope that the proper backtrace output you should get after this will shed some light on what's wrong

Alex

- You are receiving this because you were mentioned. Reply to this email directly, view it on GitHubhttps://github.com/ Optware/Optware-ng/issues/172#issuecomment-264702615, or mute the thread< https://github.com/notifications/unsubscribe-auth/APdNMCHgBl_ t9aUVzU0PpZ3xw9Ee9tQ9ks5rErl_gaJpZM4K9Mm->.

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/Optware/Optware-ng/issues/172#issuecomment-265744183, or mute the thread https://github.com/notifications/unsubscribe-auth/AGSEfIFdEuiyqbQZ0jJ06sRFeBl6NRyzks5rGAtvgaJpZM4K9Mm- .

gevialex commented 7 years ago

Ok cool no prob thanks for the support cheers

alllexx88 commented 7 years ago

I've pasted the commands and outputs at this site

http://paste.ofcode.org/35EgNU76etSg9Ad4M8HdFcg

It's still ambiguous. This time, please try this ffmpeg ipk: http://ipkg.nslu2-linux.org/optware-ng/testing/ffmpeg_2.5.4%2Bgit20150217-rev075178-6_mipsel.ipk

It's compiled without optimization, and with the most extensive debug info (-ggdb flag). Run gdb the same way as the last time. Let's see if it gets clearer now.

Thanks

alllexx88 commented 7 years ago

Closing due to no response