У меня здесь пульсы нет , пишу так -
ffmpeg -f alsa -ac 2 -i hw:0 -f x11grab -s `xrandr | grep '*' | awk '{print $1}'` -r 25 -i :0.0 -acodec pcm_s16le -threads 0 -vcodec libx264 -crf 0 -preset ultrafast video.mkv
hw:0
- звуковая карта , смотрим -
arecord -l
Лог записи -
$ ffmpeg -f alsa -ac 2 -i hw:0 -f x11grab -s `xrandr | grep '*' | awk '{print $1}'` -r 25 -i :0.0 -acodec pcm_s16le -threads 0 -vcodec libx264 -crf 0 -preset ultrafast video.mkv
ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 7.1.1 (GCC) 20170630
configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-avisynth --enable-avresample --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libass --enable-libbluray --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-shared --enable-version3
libavutil 55. 58.100 / 55. 58.100
libavcodec 57. 89.100 / 57. 89.100
libavformat 57. 71.100 / 57. 71.100
libavdevice 57. 6.100 / 57. 6.100
libavfilter 6. 82.100 / 6. 82.100
libavresample 3. 5. 0 / 3. 5. 0
libswscale 4. 6.100 / 4. 6.100
libswresample 2. 7.100 / 2. 7.100
libpostproc 54. 5.100 / 54. 5.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, alsa, from 'hw:0':
Duration: N/A, start: 1504284457.372472, bitrate: 1536 kb/s
Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
[x11grab @ 0x55a9602ff0e0] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #1, x11grab, from ':0.0':
Duration: N/A, start: 1504284457.413308, bitrate: N/A
Stream #1:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1360x768, 25 fps, 1000k tbr, 1000k tbn, 1000k tbc
Stream mapping:
Stream #1:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Stream #0:0 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
No pixel format specified, yuv444p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x55a960309e20] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0x55a960309e20] profile High 4:4:4 Predictive, level 3.2, 4:4:4 8-bit
[libx264 @ 0x55a960309e20] 264 - core 148 r2795 aaa9aa8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=0 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=cqp mbtree=0 qp=0
Output #0, matroska, to 'video.mkv':
Metadata:
encoder : Lavf57.71.100
Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv444p(progressive), 1360x768, q=-1--1, 25 fps, 1k tbn, 25 tbc
Metadata:
encoder : Lavc57.89.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
Metadata:
encoder : Lavc57.89.100 pcm_s16le
[alsa @ 0x55a9602ee0e0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
frame= 463 fps= 25 q=-1.0 Lsize= 6615kB time=00:00:18.48 bitrate=2932.2kbits/s speed=0.999x
video:3230kB audio:3378kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.108256%
[libx264 @ 0x55a960309e20] frame I:2 Avg QP: 0.00 size:854431
[libx264 @ 0x55a960309e20] frame P:461 Avg QP: 0.00 size: 3466
[libx264 @ 0x55a960309e20] mb I I16..4: 100.0% 0.0% 0.0%
[libx264 @ 0x55a960309e20] mb P I16..4: 5.2% 0.0% 0.0% P16..4: 0.1% 0.0% 0.0% 0.0% 0.0% skip:94.7%
[libx264 @ 0x55a960309e20] coded y,u,v intra: 8.4% 7.2% 7.3% inter: 0.1% 0.1% 0.1%
[libx264 @ 0x55a960309e20] i16 v,h,dc,p: 94% 6% 0% 0%
[libx264 @ 0x55a960309e20] kb/s:1428.32
Exiting normally, received signal 2.