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• Bad video quality and only 3 fps

  25 juillet 2019, par ApplowPi

  There are a few things wrong with the quality of the output file when I run this command.

  arecord -d 0 -r 48000 -c 2 -f S16_LE -t wav -D sysdefault:CARD=tc358743 | avconv -t 0 -i pipe:0 -f v4l2 -i /dev/video0 -c:v libx264 -r 30 -acodec aac -ar 48000 -vcodec flv -strict experimental -y -f flv test.flv

  The audio seems okay at the moment but, if I’m reading it correctly (at the very bottom of the output below), the fps is about 3 and the quality is at 31, which I understand is the worse. This is the output during the process.

  I’m looking to get 30 fps (ideally 60 if possible).

  I’m pretty new to this, any help would be great. Thanks in advance.

  ffmpeg version 3.2.10-1~deb9u1+rpt2 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
  
    configuration: --prefix=/usr --extra-version='1~deb9u1+rpt2' --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --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-rpi --enable-mmal --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --arch=armhf --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  Guessed Channel Layout for Input Stream #0.0 : stereo
  
  Input #0, wav, from 'pipe:0':
  
    Duration: N/A, bitrate: 1536 kb/s
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
  
  [video4linux2,v4l2 @ 0x172e110] ioctl(VIDIOC_G_PARM): Inappropriate ioctl for device
  
  [video4linux2,v4l2 @ 0x172e110] Time per frame unknown
  
  Input #1, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 927.631204, bitrate: N/A
  
      Stream #1:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1280x720, 120 tbr, 1000k tbn, 1000k tbc
  
  Output #0, flv, to 'test.flv':
  
    Metadata:
  
      encoder         : Lavf57.56.101
  
      Stream #0:0: Video: flv1 (flv) ([2][0][0][0] / 0x0002), yuv420p, 1280x720, q=2-31, 200 kb/s, 120 fps, 1k tbn, 120 tbc
  
      Metadata:
  
        encoder         : Lavc57.64.101 flv
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 48000 Hz, stereo, fltp, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc57.64.101 aac
  
  Stream mapping:
  
    Stream #1:0 -> #0:0 (rawvideo (native) -> flv1 (flv))
  
    Stream #0:0 -> #0:1 (pcm_s16le (native) -> aac (native))
  
  [wav @ 0x1728730] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  
  [video4linux2,v4l2 @ 0x172e110] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  
  overrun!!! (at least 9513.101 ms long)44kB time=00:00:00.97 bitrate=2890.9kbits/s speed=0.0987x
  
  overrun!!! (at least 25.077 ms long) 363kB time=00:00:01.84 bitrate=1614.1kbits/s speed=0.162x
  
  overrun!!! (at least 254.192 ms long)421kB time=00:00:02.97 bitrate=1159.1kbits/s speed=0.226x
  
  overrun!!! (at least 93.349 ms long) 441kB time=00:00:03.86 bitrate= 935.3kbits/s speed=0.263x
  
  overrun!!! (at least 198.942 ms long)461kB time=00:00:04.97 bitrate= 758.6kbits/s speed=0.303x
  
  overrun!!! (at least 155.909 ms long)526kB time=00:00:06.14 bitrate= 701.0kbits/s speed=0.337x
  
  frame=   54 fps=2.8 q=31.0 Lsize=     534kB time=00:00:06.67 bitrate= 655.6kbits/s speed=0.352x

  Running different commands to see what happens. This command :

  avconv -t 0 -i /dev/video0 -c:v libx264 -preset ultrafast -y newtest.h264

  Slowly builds up to 40 fps but the result is still poor. Feels like it’s 5 fps not 40. The CPU percentage when running this is 65-70%. Output is :

  ffmpeg version 3.2.10-1~deb9u1+rpt2 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
  
    configuration: --prefix=/usr --extra-version='1~deb9u1+rpt2' --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --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-rpi --enable-mmal --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --arch=armhf --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  [video4linux2,v4l2 @ 0x16d4600] ioctl(VIDIOC_G_PARM): Inappropriate ioctl for device
  
  [video4linux2,v4l2 @ 0x16d4600] Time per frame unknown
  
  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 5015.769341, bitrate: N/A
  
      Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1280x720, 59.94 tbr, 1000k tbn, 1000k tbc
  
  No pixel format specified, yuv422p for H.264 encoding chosen.
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  [libx264 @ 0x16d77e0] using cpu capabilities: ARMv6 NEON
  
  [libx264 @ 0x16d77e0] profile High 4:2:2, level 3.2, 4:2:2 8-bit
  
  Output #0, h264, to 'newtest.h264':
  
    Metadata:
  
      encoder         : Lavf57.56.101
  
      Stream #0:0: Video: h264 (libx264), yuv422p, 1280x720, q=-1--1, 59.94 fps, 59.94 tbn, 59.94 tbc
  
      Metadata:
  
        encoder         : Lavc57.64.101 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame= 1813 fps= 37 q=-1.0 Lsize=    3218kB time=00:00:30.24 bitrate= 871.5kbits/s dup=1700 drop=0 speed=0.617x
  
  video:3218kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
  
  [libx264 @ 0x16d77e0] frame I:8     Avg QP:14.00  size:170114
  
  [libx264 @ 0x16d77e0] frame P:1805  Avg QP:15.46  size:  1071
  
  [libx264 @ 0x16d77e0] mb I  I16..4: 100.0%  0.0%  0.0%
  
  [libx264 @ 0x16d77e0] mb P  I16..4:  0.4%  0.0%  0.0%  P16..4:  2.0%  0.0%  0.0%  0.0%  0.0%    skip:97.6%
  
  [libx264 @ 0x16d77e0] coded y,uvDC,uvAC intra: 43.4% 28.3% 19.2% inter: 1.1% 0.8% 0.2%
  
  [libx264 @ 0x16d77e0] i16 v,h,dc,p: 61% 26%  8%  5%
  
  [libx264 @ 0x16d77e0] i8c dc,h,v,p: 68% 12% 17%  4%
  
  [libx264 @ 0x16d77e0] kb/s:871.45

  Running this command :

  avconv -t 0 -i /dev/video0 -r 60 -c:v libx264 -preset ultrafast -y newtest.flv 

  (just specifying a different output file format, results in a CPU usage of about 30% and produces this output :

  avconv -t 0 -i /dev/video0 -r 60 -c:v libx264 -preset ultrafast -y newtest.flv
  
  ffmpeg version 3.2.10-1~deb9u1+rpt2 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
  
    configuration: --prefix=/usr --extra-version='1~deb9u1+rpt2' --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --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-rpi --enable-mmal --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --arch=armhf --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  [video4linux2,v4l2 @ 0x527620] ioctl(VIDIOC_G_PARM): Inappropriate ioctl for device
  
  [video4linux2,v4l2 @ 0x527620] Time per frame unknown
  
  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 6071.912862, bitrate: N/A
  
      Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1280x720, 120 tbr, 1000k tbn, 1000k tbc
  
  No pixel format specified, yuv422p for H.264 encoding chosen.
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  [libx264 @ 0x52a870] using cpu capabilities: ARMv6 NEON
  
  [libx264 @ 0x52a870] profile High 4:2:2, level 3.2, 4:2:2 8-bit
  
  [libx264 @ 0x52a870] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=1 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=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
  
  Output #0, flv, to 'newtest.flv':
  
    Metadata:
  
      encoder         : Lavf57.56.101
  
      Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv422p, 1280x720, q=-1--1, 60 fps, 1k tbn, 60 tbc
  
      Metadata:
  
        encoder         : Lavc57.64.101 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame=  158 fps=4.1 q=-1.0 Lsize=     878kB time=00:00:30.70 bitrate= 234.2kbits/s speed=0.803x
  
  video:874kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.385400%
  
  [libx264 @ 0x52a870] frame I:1     Avg QP:20.00  size: 68854
  
  [libx264 @ 0x52a870] frame P:157   Avg QP: 8.93  size:  5261
  
  [libx264 @ 0x52a870] mb I  I16..4: 100.0%  0.0%  0.0%
  
  [libx264 @ 0x52a870] mb P  I16..4:  1.4%  0.0%  0.0%  P16..4:  7.7%  0.0%  0.0%  0.0%  0.0%    skip:90.9%
  
  [libx264 @ 0x52a870] coded y,uvDC,uvAC intra: 28.1% 13.8% 13.4% inter: 3.4% 2.7% 2.3%
  
  [libx264 @ 0x52a870] i16 v,h,dc,p: 76% 22%  1%  1%
  
  [libx264 @ 0x52a870] i8c dc,h,v,p: 88%  4%  7%  0%
  
  [libx264 @ 0x52a870] kb/s:231.42

• OSError : [Errno 2] No such file or directory - code worked on new computer doesnt work on old one

  9 mars 2016, par Natasha Hoherchak

  I wrote a script to extract frames from a database I have stored on my computer desktop. I wrote the code on a different computer (new macbook pro 2016) as my computer’s harddrive died. I was finally able to restore my computer (and therefore returned the new computer I wrote the code on).

  I am trying to run the same script, completely unchanged and I keep getting this error : (The line btwn ** ATTENTION** is the printed command line.)

  --------------------------**********ATTENTION**********-------------------------
  
  ffmpeg -i /Desktop/UCF101/v_BaseballPitch_g01_c01.avi -ss 00:00:00.0 -vframes 1 BPout0.png
  
  --------------------------**********ATTENTION**********-------------------------
  
  Traceback (most recent call last):
  
    File "./Desktop/processing.py", line 50, in <module>
  
      processvideo('/Desktop/UCF101/v_BaseballPitch_g01_c01.avi')
  
    File "./Desktop/processing.py", line 47, in processvideo
  
      sp.check_output(args) #was cmdline
  
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 568, in check_output
  
      process = Popen(stdout=PIPE, *popenargs, **kwargs)
  
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 711, in __init__
  
      errread, errwrite)
  
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1308, in _execute_child
  
      raise child_exception
  
  OSError: [Errno 2] No such file or directory
  
  </module>

  Everything is in the same place as it was on the new computer where it was able to run successfully. Does anyone have any idea what it could be ? Could my version of python have anything to do with it ? Could it be a larger issue on my computer ? Any tips for debugging whats caused this error ? I’ve already printed the command (matches perfectly), used shlex.split("mycommandline"), checked my current directory in the script...

• How to convert raw .avi to .yuv through command line (YUV420) ?

  27 février 2016, par Natures Wrath

  I have tried the following command to no avail :

  ffmpeg -i in.avi -vcodec rawvideo -pix_fmt yuv420p out.yuv

  I have a raw avi file (which plays video on vlc). I then take .yuv file. I then tried this command :

  ffmpeg -i in.avi -c:v rawvideo -pix_fmt yuv420p out.yuv

  Still, no luck. I am at a loss as to why my output .yuv file is incorrect. I have a sneaking suspicion that my yuv is not being given the proper headers during this conversion.

  Does anyone know what I can do to get a proper .yuv file from a raw .avi (which I have confirmed is playable on vlc) ?

  Output from second command : (please note that "out.avi" is actually my in.avi from above two commands)

      ffmpeg version 2.8.6 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with Apple LLVM version 7.0.2 (clang-700.1.81)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.6 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
  
    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, avi, from 'out.avi':
  
    Metadata:
  
      encoder         : Lavf56.40.101
  
    Duration: 00:01:13.16, start: 0.000000, bitrate: 104602 kb/s
  
      Stream #0:0: Video: huffyuv (HFYU / 0x55594648), yuv422p, 1280x720, 104653 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Output #0, rawvideo, to 'fin.yuv':
  
    Metadata:
  
      encoder         : Lavf56.40.101
  
      Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc56.60.100 rawvideo
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (huffyuv (native) -> rawvideo (native))
  
  Press [q] to stop, [?] for help
  
  frame=  124 fps=0.0 q=-0.0 size=  167400kB time=00:00:04.96 bitrate=276480.0kbits/s dup=1 drop=0   frame=  250 fps=249 q=-0.0 size=  337500kB time=00:00:10.00 bitrate=276480.0kbits/s dup=1 drop=0   frame=  372 fps=247 q=-0.0 size=  502200kB time=00:00:14.88 bitrate=276480.0kbits/s dup=1 drop=0   frame=  497 fps=247 q=-0.0 size=  670950kB time=00:00:19.88 bitrate=276480.0kbits/s dup=1 drop=0   frame=  621 fps=247 q=-0.0 size=  838350kB time=00:00:24.84 bitrate=276480.0kbits/s dup=1 drop=0   frame=  741 fps=246 q=-0.0 size= 1000350kB time=00:00:29.64 bitrate=276480.0kbits/s dup=1 drop=0   frame=  858 fps=244 q=-0.0 size= 1158300kB time=00:00:34.32 bitrate=276480.0kbits/s dup=1 drop=0   frame=  984 fps=245 q=-0.0 size= 1328400kB time=00:00:39.36 bitrate=276480.0kbits/s dup=1 drop=0   frame= 1108 fps=245 q=-0.0 size= 1495800kB time=00:00:44.32 bitrate=276480.0kbits/s dup=1 drop=0   frame= 1232 fps=245 q=-0.0 size= 1663200kB time=00:00:49.28 bitrate=276480.0kbits/s dup=1 drop=0   frame= 1356 fps=246 q=-0.0 size= 1830600kB time=00:00:54.24 bitrate=276480.0kbits/s dup=1 drop=0   frame= 1482 fps=246 q=-0.0 size= 2000700kB time=00:00:59.28 bitrate=276480.0kbits/s dup=1 drop=0   frame= 1606 fps=246 q=-0.0 size= 2168100kB time=00:01:04.24 bitrate=276480.0kbits/s dup=1 drop=0   frame= 1728 fps=246 q=-0.0 size= 2332800kB time=00:01:09.12 bitrate=276480.0kbits/s dup=1 drop=0   frame= 1829 fps=246 q=-0.0 Lsize= 2469150kB time=00:01:13.16 bitrate=276480.0kbits/s dup=1 drop=0    
  
  video:2469150kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
  
  100 taken.