Sur d’autres sites (10109)

• 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

• lavc/h265_profile_level : Add new profiles

  6 mai 2019, par Mark Thompson

  lavc/h265_profile_level : Add new profiles
  Monochrome 10 and Main 10 Still Picture profiles are added by the 2018
  
  version of the standard.
  

  • [DH] libavcodec/h265_profile_level.c

• Your 6-step guide to increasing acquisition

  2 juillet 2019, par Matomo Core Team — Analytics Tips
  Your 6-step guide to increasing acquisition

  Want to save time and money, as well as increase conversions and acquisition ? Matomo Analytics is here to help with that !

  Let’s start by helping you create a website visitors’ acquisition strategy, without it you might be going in blind and missing opportunities that might’ve been easily found in your metrics.

  To help you craft a strategy for your site, check out the steps below !

  Step one : Get familiar with the Acquisition feature

  The easiest way is to start with Matomo’s Acquisition feature itself. Discover and take action on the marketing channels with the biggest ROI for your business. You’ll learn :

  How to get traffic from external websites : Find out who’s helping you succeed from external websites and convince them to do more of it. Get more traffic by proactively asking for : paid sponsorships ; guest blog posts ; or spending more advertising on the particular website.

  

  About Social Networks : Which social media channels are connecting with the audience you want ? Take the guesswork out by using only the ones you need. By finding out which social channels your ideal audience prefers, you can generate shareable, convincing and engaging content to drive shares and traffic through to your site.

  Campaigns : This helps you understand which marketing campaign is working and which isn’t. You can then shift your efforts to effectively gain more visitors with less costs. Keep track of every ad and content piece you show across internal and external channels to see which has the biggest impact on your business objectives.

  Enhanced SEO : Every acquisition plan needs a focus on maximising your Search Engine Optimization (SEO) efforts. When it comes to getting conclusive search engine referrer metrics, you need to be sure you’re getting ALL the insights to drive your SEO strategy. See keyword position rankings, integrate Google, Bing and Yahoo search consoles, and no longer be restricted with “keyword not defined” showing up in your keywords reports.

  >> Watch Acquisition introduction video (playtime : 2.54 minutes)

  Step two : Set your goals and monitor conversion funnels

  Let the Goals feature guide you

  Goals are essential for building your marketing strategy and getting new customers. The more goals you track, the more you learn about behavioural changes and modify pathways to impact acquisitions over time. 

  Are you checking :

  • Which channels are converting the best for your business ?
  • Which cities/countries are most popular ?
  • What devices will attract the most visitors ?
  • How engaged your visitors are before converting ?

  This way you can see if your campaigns (SEO, PPC, signups, blogs etc.) or optimising efforts (A/B Testing, Funnels) have made an impact with the time and investment you’ve put in.

  >> Watch Goals introduction video (playtime : 2.04 minutes)

  The Funnels feature leads you to success

  Conversion funnels give you the big picture on whether your acquisition plans are paying off and where they may be falling short. If the ultimate goal of your site is to drive conversions, then each funnel can tell you how effectively you’re driving traffic through to your desired outcome.

  >> Watch Funnels introduction video (playtime : 2.29 minutes)

  

  Step three : Measure the success of every touchpoint in your customer’s journey

  Multi Attribution feature

  Accurately identify channels where visitors first engage with your business, as well as the final channel they came from, before purchasing your product/service. This helps you make smarter decisions when determining acquisition spend to accurately calculate the Customer Acquisition Cost (CAC). Here you no longer falsely over-estimate investment in failing marketing channels.

  >> Watch Multi Attribution introduction video (playtime : 2.28 minutes)

  Step four : For ecommerce sites, understand who your customers are to increase sales

  Ecommerce feature to significantly increase $ potential

  If your website’s overall purpose is to generate revenue, the Ecommerce feature gives you comprehensive insights into your customer’s purchasing behaviours.

  This heavily reduces your risks when marketing products to potential customers as you’ll understand who to target, what to target them with and where further opportunities exist.

  >> Watch Ecommerce introduction video (playtime : 2.04 minutes)

  

  Step five : Make sure the forms on your website are easy to complete

  Form Analytics feature

  Once you get visitors through the funnel, the forms on your website are the final step to conversion and need special attention. If not done right, you could be missing out on converting a large portion of your visitors.

  Thankfully, you can now identify and fix pain points on the forms that are most important to your business’ success.

  >> Watch Form Analytics introduction video (playtime : 2.39 minutes)

  

  Step six : Discover what a customer journey looks like on a user-by-user basis and bring in key acquisition elements to your strategy

  Visitor Profiles tell you each visitors’ history

  The Profile feature summarises every visit, action and purchase made.

  Better understand :

  • Why your visitors viewed your website.
  • Why your returning visitors continue to view your website.
  • What specifically your visitors are looking for and whether they found it on your website.

  The benefit is being able to see how a combination of acquisition channels play a part in a single buyer’s journey.

  >> Watch Visitors introduction video (playtime : 1.46 minutes)

  

  To summarise

  This guide will set you on a path to creating a well-planned acquisition strategy. It’s the key to attracting and capturing the attention of potential visitors/leads, and successfully driving them through a funnel/buyer’s journey on your website.

  Because of Matomo’s reputation as a trusted analytics platform, the features above can be used to assist you in making smarter data-driven decisions. You can pursue different acquisition avenues with confidence and create a strategy that’s agile and ready for success, all while respecting user privacy.