[SOLVED] RPi: Error compiling ffmpeg 4.0.2 with hevc optimizations

Hammett · August 18, 2018 at 2:14 PM

Hi all,

I am unable to compile ffmpeg 4.0.2 with hevc optimizations on RPi stretch with the following error

Code

LD    ffmpeg_g
LD    ffplay_g
LD    ffprobe_g
/usr/bin/ld: libavcodec/libavcodec.a(rpi_qpu.o): undefined reference to symbol 'vcsm_vc_hdl_from_hdl'
//opt/vc/lib/libvcsm.so: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
Makefile:107: recipe for target 'ffprobe_g' failed
make: *** [ffprobe_g] Error 1
make: *** Waiting for unfinished jobs....
/usr/bin/ld: libavcodec/libavcodec.a(rpi_qpu.o): undefined reference to symbol 'vcsm_vc_hdl_from_hdl'
//opt/vc/lib/libvcsm.so: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
Makefile:107: recipe for target 'ffmpeg_g' failed
make: *** [ffmpeg_g] Error 1
/usr/bin/ld: libavcodec/libavcodec.a(rpi_qpu.o): undefined reference to symbol 'vcsm_vc_hdl_from_hdl'
//opt/vc/lib/libvcsm.so: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
Makefile:107: recipe for target 'ffplay_g' failed
make: *** [ffplay_g] Error 1

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I have applied patch found here LibreELEC.tv/ffmpeg-99.1003-pfcd_hevc_optimisations.patch at master · LibreELEC/LibreELEC.tv · GitHub without any errors.

I have an rpi 3B+ with Raspbian Stretch updated, along with rpi-firmware updated as of today.

Has anybody encountered the same error or know how to fix it?

Thanks!

**awiouy** · August 18, 2018 at 3:43 PM Official Post

Quote from Hammett
Hi all,

I am unable to compile ffmpeg 4.0.2 with hevc optimizations on RPi stretch with the following error
Code
LD    ffmpeg_g
LD    ffplay_g
LD    ffprobe_g
/usr/bin/ld: libavcodec/libavcodec.a(rpi_qpu.o): undefined reference to symbol 'vcsm_vc_hdl_from_hdl'
//opt/vc/lib/libvcsm.so: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
Makefile:107: recipe for target 'ffprobe_g' failed
make: *** [ffprobe_g] Error 1
make: *** Waiting for unfinished jobs....
/usr/bin/ld: libavcodec/libavcodec.a(rpi_qpu.o): undefined reference to symbol 'vcsm_vc_hdl_from_hdl'
//opt/vc/lib/libvcsm.so: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
Makefile:107: recipe for target 'ffmpeg_g' failed
make: *** [ffmpeg_g] Error 1
/usr/bin/ld: libavcodec/libavcodec.a(rpi_qpu.o): undefined reference to symbol 'vcsm_vc_hdl_from_hdl'
//opt/vc/lib/libvcsm.so: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
Makefile:107: recipe for target 'ffplay_g' failed
make: *** [ffplay_g] Error 1
Display More
I have applied patch found here LibreELEC.tv/ffmpeg-99.1003-pfcd_hevc_optimisations.patch at master · LibreELEC/LibreELEC.tv · GitHub without any errors.

I have an rpi 3B+ with Raspbian Stretch updated, along with rpi-firmware updated as of today.

Has anybody encountered the same error or know how to fix it?

Thanks!
Display More

Woah!

You use a patch from LibreELEC, but you do not specify what you compile, let alone how.

LibreELEC has a build system of its own. To see how ffmpeg is built, see here: LibreELEC.tv/packages/multimedia/ffmpeg at master · LibreELEC/LibreELEC.tv · GitHub

**Iridium** · August 18, 2018 at 5:51 PM Official Post

I believe that some Milhouse builds have an optimised ffmpeg included for x265 decoding on RPi. I also believe this will hopefully be included in LE9 final.

**HiassofT** · August 18, 2018 at 6:52 PM

ffmpeg HEVC optimization patches are included in LE master tree, what's currently missing in LE master tree are the kodi patches needed to use these.

so long,

Hias

Hammett · August 19, 2018 at 12:03 AM

I managed to compile FFmpeg successfuly with the following:

Code

./configure     
    --prefix=/usr     
    --enable-gpl     
    --enable-nonfree     
    --enable-static     
    --enable-libtheora     
    --enable-libvorbis     
    --enable-omx     
    --enable-omx-rpi     
    --enable-mmal     
    --enable-libxcb     
    --enable-libfreetype     
    --enable-libass     
    --enable-gnutls     
    --disable-opencl     
    --extra-cflags="-march=armv8-a+crc -mfpu=neon-fp-armv8 -mtune=cortex-a53"     
    --disable-doc     
    --enable-rpi     
    --disable-ffplay     
    --disable-ffprobe     
    --extra-libs="-L/opt/vc/lib -lbcm_host -lvcos -lvchiq_arm -lmmal -lmmal_core -lmmal_util -lvcsm"     
    --target-os=linux

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What I was missing from my initial post is the extra libs. Once I added those, compilation and install went fine.

**awiouy** · August 19, 2018 at 8:59 AM Official Post

Excellent!

Thank you for documenting your solution.

A tip for next time: document the instructions you use for compiling in the first post, it helps diagnosing the issue