LinuxQuestions.org - [SOLVED] ffmpeg every codec gives me an Illegal instruction error

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ffmpeg every codec gives me an Illegal instruction error

Hi,

I am using Slackware on a 32 bit machine.

Code:

*-core

      description: Motherboard

      product: A7N8X-E

      vendor: ASUSTeK Computer INC.





*-cpu

          description: CPU

          product: AMD Athlon(tm) XP 3000+

          vendor: Advanced Micro Devices [AMD]

          physical id: 4

          bus info: cpu@0

          version: 6.10.0

          slot: Socket A

          size: 2100MHz

          capacity: 3GHz

          width: 32 bits

I recently install the ffmpeg from the UK slackbuilds.

http://slackware.uk/people/alien/res...mpeg/pkg/14.2/

Whenever I try a simple

Code:

ffmpeg -i sample_movie.mpg sample_movie.mp4

it throws this error:

Code:

Illegal instruction

With no other explanation. It happens with any container, not just mp4.

What Slackware version are you using?

Can you try building ffmpeg and its dependencies yourself from SlackBuilds.org?

I am using slackware-current. Should I be using the stable version? I would build from source after I search out how.

If you are using current, then you should already have ffmpeg installed. I would remove any ffmpeg packages you have installed and then reinstall it with slackpkg. You can also update current using slackpkg to ensure you aren't using an old current?

Here's the problem: 'AMD Athlon(tm) XP 3000+'

It's a Barton processor. It hasn't got SSE2 instructions. 'cat /proc/cpuinfo | grep flags' will show sse, but not sse2.

I doubt there's an ffmpeg build flag for disabling sse2 support. You'll get the same problem with lots of other audio, multimedia and graphics software. The world moved on and left your cpu behind. Sorry.

Update!! A very helpful friend (ponce ;) ) tells me that there are flags '--disable-sse2' and '--disable-sse3' that you can add to the ffmpeg SlackBuild so that it should work!!

Thanks for responding. I added those options to the Slackbuild and got this:

Code:

[mark@mediacenter1 Movies]$ ffmpeg -i War.Games.The.Dead.Code.mpg sample.mp4

ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers

  built with gcc 5.3.0 (GCC)

  configuration: --prefix=/usr --libdir=/usr/lib --shlibdir=/usr/lib --docdir=/usr/doc/ffmpeg-3.4.1 --mandir=/usr/man --enable-gpl --enable-version3 --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libass --enable-libdc1394 --enable-libfribidi --enable-libgsm --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libssh --enable-libspeex --enable-libtheora --enable-libv4l2 --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libzvbi --enable-postproc --enable-runtime-cpudetect --enable-sdl2 --enable-vaapi --enable-vdpau --enable-pthreads --enable-bzlib --enable-zlib --enable-shared --enable-static --disable-debug --disable-sse2 --disable-sse3 --enable-libpulse --enable-libfdk-aac --enable-openssl --enable-nonfree --extra-cflags='-I/tmp/build/tmp-ffmpeg/ffmpegdeps/usr/include -I/tmp/build/tmp-ffmpeg/ffmpegdeps/usr/include/SDL2 -DRUNTIME_CPUDETECT' --extra-ldflags='-L/tmp/build/tmp-ffmpeg/ffmpegdeps/usr/lib -ldl -lssl -lcrypto -lz -lusb -ldrm' --pkg-config-flags=--static

  libavutil      55. 78.100 / 55. 78.100

  libavcodec    57.107.100 / 57.107.100

  libavformat    57. 83.100 / 57. 83.100

  libavdevice    57. 10.100 / 57. 10.100

  libavfilter    6.107.100 /  6.107.100

  libavresample  3.  7.  0 /  3.  7.  0

  libswscale      4.  8.100 /  4.  8.100

  libswresample  2.  9.100 /  2.  9.100

  libpostproc    54.  7.100 / 54.  7.100

Input #0, mpeg, from 'War.Games.The.Dead.Code.mpg':

  Duration: 01:39:52.13, start: 0.280633, bitrate: 5149 kb/s

    Stream #0:0[0x1bf]: Data: dvd_nav_packet

    Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, top first), 720x480 [SAR 8:9 DAR 4:3], Closed Captions, 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc

    Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s

    Stream #0:3[0x81]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s

    Stream #0:4[0x82]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s

    Stream #0:5[0x83]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s

    Stream #0:6[0x84]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s

File 'sample.mp4' already exists. Overwrite ? [y/N] y

Stream mapping:

  Stream #0:1 -> #0:0 (mpeg2video (native) -> h264 (libx264))

  Stream #0:3 -> #0:1 (ac3 (native) -> aac (native))

Press [q] to stop, [?] for help

Illegal instruction

Not all the packages were linked correctly, so I used wget in this way to get the packages locally.

Code:

wget --recursive --page-requisites --html-extension --convert-links --restrict-file-names=windows --no-parent http://slackware.uk/people/alien/restricted_slackbuilds/ffmpeg/build/

have you tried with another output video codec, like mpeg or xvid? it might be that also libx264 requires a minimum set of sse2 extensions...

It's working so far with mpeg. Thanks.