Пытаюсь записать видео командой
mencoder tv:// -tv driver=v4l2:device=/dev/video0:alsa:forceaudio:amode=0:adevice=hw.0,0 -ovc lavc -oac mp3lame -lameopts vbr=3:br=32:mode=3 -af volnorm -o video.avi
Когда подбирал опции, всё норм записывалось. Теперь же при воспроизведении у меня видео воспроизводится в удвоенной скорости, звук в норме. При кодировании такие сообщения:
MEncoder svn r34540 (Ubuntu), built with gcc-4.6 (C) 2000-2012 MPlayer Team
success: format: 9 data: 0x0 - 0x0
TV file format detected.
Selected driver: v4l2
name: Video 4 Linux 2 input
author: Martin Olschewski <olschewski@zpr.uni-koeln.de>
comment: first try, more to come ;-)
v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead.
Selected device: USB2.0 Camera
Capabilities: video capture streaming
supported norms:
inputs: 0 = Camera 1;
Current input: 0
Current format: YUYV
v4l2: ioctl set format failed: Invalid argument
v4l2: ioctl set format failed: Invalid argument
v4l2: ioctl set format failed: Invalid argument
tv.c: norm_from_string(pal): Bogus norm parameter, setting default.
v4l2: ioctl enum norm failed: Invalid argument
Error: Cannot set norm!
Selected input hasn't got a tuner!
v4l2: ioctl set mute failed: Invalid argument
[V] filefmt:9 fourcc:0x32595559 size:640x480 fps:30.000 ftime:=0.0333
==========================================================================
Opening audio decoder: [pcm] Uncompressed PCM audio decoder
AUDIO: 44100 Hz, 2 ch, s16le, 1411.2 kbit/100.00% (ratio: 176400->176400)
Selected audio codec: [pcm] afm: pcm (Uncompressed PCM)
==========================================================================
libavcodec version 53.35.0 (external)
Mismatching header version 53.32.2
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
==========================================================================
Opening video decoder: [raw] RAW Uncompressed Video
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
Movie-Aspect is undefined - no prescaling applied.
[swscaler @ 0x7fd2f9389120]using unscaled yuyv422 -> yuv420p special converter
videocodec: libavcodec (640x480 fourcc=34504d46 [FMP4])
Selected video codec: [rawyuy2] vfm: raw (RAW YUY2)
==========================================================================
MP3 audio selected.
Forcing audio preload to 0, max pts correction to 0.
Pos: 0.0s 1f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.000 [0:0]
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
Pos: 0.3s 8f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.000 [0:0]
Skipping frame!
Pos: 0.4s 12f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.000 [0:0]
Skipping frame!
Pos: 0.5s 16f ( 0%) 13.09fps Trem: 0min 0mb A-V:0.000 [0:0]
Skipping frame!
Pos: 0.6s 20f ( 0%) 13.57fps Trem: 0min 0mb A-V:0.000 [0:0]
Skipping frame!
Pos: 0.7s 24f ( 0%) 13.82fps Trem: 0min 0mb A-V:0.000 [0:0]
Skipping frame!
Pos: 0.8s 28f ( 0%) 14.16fps Trem: 0min 0mb A-V:0.000 [0:0]
Skipping frame!
Pos: 0.9s 33f ( 0%) 14.36fps Trem: 0min 0mb A-V:0.000 [0:0]
Skipping frame!
Pos: 1.0s 37f ( 0%) 14.49fps Trem: 0min 0mb A-V:0.000 [0:0]
Skipping frame!
Pos: 1.1s 41f ( 0%) 14.61fps Trem: 0min 0mb A-V:0.000 [1304:32]
Skipping frame!
^Cs: 1.2s 45f ( 0%) 14.72fps Trem: 0min 0mb A-V:0.000 [1259:32]
Skipping frame!
Pos: 1.2s 46f ( 0%) 14.78fps Trem: 0min 0mb A-V:0.000 [1259:32]
Flushing video frames.
Writing index...
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
Video stream: 1259.467 kbit/s (157433 B/s) size: 188920 bytes 1.200 secs 46 frames
Audio stream: 32.715 kbit/s (4089 B/s) size: 4914 bytes 1.202 secs
v4l2: ioctl set mute failed: Invalid argument
v4l2: 48 frames successfully processed, 45 frames dropped.
Получается, пропуская кадры, видео записывается в два раза быстрее. Пробовал записывать без звука - тогда идёт нормально. Видимо, проблема в синхронизации, но как бы я не менял значения fps и srate, проблема на месте. Что можно попробовать, чтобы видео проигрывалось в нормальной скорости?
