[FFmpeg-user] chwe17/FFmpeg-Cedrus can't open my webcam?
cedric.dewijs at telfort.nl
cedric.dewijs at telfort.nl
Mon May 14 16:48:18 EEST 2018
Hi all,
I have a bananapi, running Armbian 5.38. I have done the following steps to compile ffmpeg:
git clone https://github.com/chwe17/FFmpeg-Cedrus.git
cd FFmpeg-Cedrus/
./configure --prefix=/usr --enable-nonfree --enable-gpl --enable-version3 --enable-vdpau --enable-libx264 --enable-libpulse --enable-libv4l2
make -j 2
sudo make install
Now i try to capture and encode video from my webcam:
cedric at bananapi:~$ ffmpeg -i /dev/video0 -c:v cedrus264 -b:v 1000k -vewait 1000 -f h264 test.h264
ffmpeg version git-2018-03-24-e785140 Copyright (c) 2000-2014 the FFmpeg developers
built on May 4 2018 16:31:39 with gcc 5.4.0 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.5) 20160609
configuration: --prefix=/usr --enable-nonfree --enable-gpl --enable-version3 --enable-vdpau --enable-libx264 --enable-libpulse --enable-libv4l2
libavutil 54. 6.100 / 54. 6.100
libavcodec 56. 0.101 / 56. 0.101
libavformat 56. 2.100 / 56. 2.100
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 0.102 / 5. 0.102
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
/dev/video0: Invalid argument
Then I uninstall and reinstall ffmpeg from armbian, so I can test if my webcam itself is to blame. I see this works correctly, but it does not have the options -c:v cedrus264 and -vewait:
cedric at bananapi:~/new/FFmpeg-Cedrus$ ffmpeg -b:v 1000k -f h264 test.h264 -i /dev/video0
ffmpeg version 2.8.14-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 20160609
configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Input #0, video4linux2,v4l2, from '/dev/video0':
Duration: N/A, start: 1597.248143, bitrate: 110592 kb/s
Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x360, 110592 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
File 'test.h264' already exists. Overwrite ? [y/N] y
No pixel format specified, yuv422p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x1682dc0] using cpu capabilities: ARMv6 NEON
[libx264 @ 0x1682dc0] profile High 4:2:2, level 3.0, 4:2:2 8-bit
Output #0, h264, to 'test.h264':
Metadata:
encoder : Lavf56.40.101
Stream #0:0: Video: h264 (libx264), yuv422p, 640x360, q=-1--1, 1000 kb/s, 30 fps, 30 tbn, 30 tbc
Metadata:
encoder : Lavc56.60.100 libx264
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Press [q] to stop, [?] for help
^Cav_interleaved_write_frame(): Immediate exit requested
^CReceived > 3 system signals, hard exiting
After that i repeated the test from above with my compiled version:
cedric at bananapi:~/new/FFmpeg-Cedrus$ ./ffmpeg -v debug -c:v cedrus264 -b:v 1000k -vewait 1000 -f h264 test.h264 -i /dev/video0
ffmpeg version git-2018-03-24-e785140 Copyright (c) 2000-2014 the FFmpeg developers
built on May 4 2018 16:31:39 with gcc 5.4.0 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.5) 20160609
configuration: --prefix=/usr --enable-nonfree --enable-gpl --enable-version3 --enable-vdpau --enable-libx264 --enable-libpulse --enable-libv4l2
libavutil 54. 6.100 / 54. 6.100
libavcodec 56. 0.101 / 56. 0.101
libavformat 56. 2.100 / 56. 2.100
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 0.102 / 5. 0.102
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with argument 'debug'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'cedrus264'.
Reading option '-b:v' ... matched as option 'b' (video bitrate (please use -b:v)) with argument '1000k'.
Reading option '-vewait' ... matched as AVOption 'vewait' with argument '1000'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'h264'.
Reading option 'test.h264' ... matched as output file.
Reading option '-i' ... matched as input file with argument '/dev/video0'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input file /dev/video0.
Successfully parsed a group of options.
Opening an input file: /dev/video0.
[AVIOContext @ 0x214fc80] Statistics: 0 bytes read, 0 seeks
/dev/video0: Invalid argument
Where can I get a version of ffmpeg that uses the h264 hardware encoder for the Allwinner A20 SOC on the bananapi?
Cheers,
Cedric
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