Hello,
So at the moment I can record video only like this:
ffmpeg -f v4l2 -input_format mjpeg -s uhd2160 -i /dev/video0 -vcodec
copy video.mp4
and audio only like this:
ffmpeg -f pulse -channels 1 -i default audio.wav
But I can't seem to make both record at the same time and I've tried it
all. This is the closest I got so far that doesn't throw any errors:
ffmpeg -f v4l2 -input_format mjpeg -s uhd2160 -i /dev/video0 -f pulse
-channels 1 -i default video.mp4
The above command produces following output, but doesn't record anything
(output file is 0 bytes) and needs to be killed manually (pressing 'q'
does nothing):
ffmpeg version 3.4-1~16.04.york0 Copyright (c) 2000-2017 the FFmpeg
developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.5) 20160609
configuration: --prefix=/usr --extra-version='1~16.04.york0'
--toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
--incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping
--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-libmp3lame --enable-libopenjpeg --enable-libopenmpt
--enable-libopus --enable-libpulse --enable-librubberband
--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-libzmq --enable-libzvbi
--enable-omx --enable-openal --enable-opengl --enable-sdl2
--enable-libdc1394 --enable-libiec61883 --enable-chromaprint
--enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
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, video4linux2,v4l2, from '/dev/video0':
Duration: N/A, start: 6061.105323, bitrate: N/A
Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown),
3840x2160, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
Guessed Channel Layout for Input Stream #1.0 : mono
Input #1, pulse, from 'default':
Duration: N/A, start: 1512320284.610900, bitrate: 768 kb/s
Stream #1:0: Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x558ff21210e0] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2 AVX
[libx264 @ 0x558ff21210e0] profile High 4:2:2, level 5.1, 4:2:2 8-bit
[libx264 @ 0x558ff21210e0] 264 - core 148 r2795 aaa9aa8 - H.264/MPEG-4
AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html -
options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7
psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1
8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2
threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1
interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2
b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250
keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf
mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40
aq=1:1.00
Output #0, mp4, to 'video.mp4':
Metadata:
encoder : Lavf57.83.100
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661),
yuvj422p(pc, progressive), 3840x2160, q=-1--1, 30 fps, 15360 tbn, 30 tbc
Metadata:
encoder : Lavc57.107.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono,
fltp, 69 kb/s
Metadata:
encoder : Lavc57.107.100 aac
frame= 1 fps=0.1 q=0.0 size= 0kB time=00:00:00.27 bitrate=
0.0kbits/s speed=0.0204x
Any ideas how can I make it work? I need mono audio and both audio and
video in lossless formats.
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