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• Presentation of Piwik’s collaborative translations platform : oTrance [Interview]

  19 avril 2013, par matt — Community, translation

  Piwik enables domain administrators, hobbyists, power users, personal website builders and everyone in between to access enormous amounts of data for website analytics. To support all those users, Piwik needs to be available in a number of different languages. From the start, we made internationalization (i18n) part of Piwik’s DNA. There are now dozens active volunteers who help make sure each language is well represented in the latest official release of Piwik. As of now, Piwik is available in 48 languages.

  Recently a new tool became available that makes the translation of Piwik much easier. The software we are using is an open source platform called oTrance. It has made our translation architecture more robust, and it allows us to expedite the timely delivery of high quality and up-to-date translations to the thousands of people who rely on Piwik every day.

  We’ve met with oTrance creator and lead developer Daniel Schlichtholz who answered a few questions for us.

  1. What is oTrance ?
  2. What sets oTrance apart from the other ways to manage translations ?
  3. Now that oTranCe 1.0 is out, what will you be working on next ?

  What is oTrance ?

  oTranCe is the short form of “Online Translation Center”. It was born because I needed a translation platform for my project MySQLDumper.

  Many languages have been added by the community and manual maintenance became more and more time consuming. I wanted to change that. So I searched for an existing platform I could use and tested a lot of approaches. To put a long story short : none of the given solutions satisfied my needs.

  From the view of a translator maintaining a language should be as easy as possible. In most cases they have to install a program on their local machine or the workflow was too difficult. A translator doesn’t want to struggle with technical things ; he just wants to translate the phrases and wants to know the progress.

  That’s the main goal we want to reach : to make the translation process as easy as possible.

  What sets oTrance apart from the other ways to manage translations ?

  Ease of use is one advantage of oTranCe compared to other solutions. Another advantage is that project administrators can install oTranCe on their own server – so nobody is dependant of a third party provider.

  We love to get feedback from other users. User feedback influences the way oTranCe is developed. We believe that this way oTranCe satisfies the requirements of the real world.

  We also have extensive user documentation, in our “Working with oTranCe” wiki. We try to document use cases in an understandable way. We don’t write down marketing buzz words, but try to explain the use from the view of the user/administrator.

  Now that oTranCe 1.0 is out, what will you be working on next ?

  The language files can be exported to version control and oTranCe can commit changes to the target repository. Currently we support export to Subversion, and we are working on a Git export adapter, which will be released soon.

  Another issue we are trying to solve is the context problem. When your project uses many different phrases the translator often doesn’t know in which context the current phrase is used. Version 1.1.0 (not released yet, but you can grab the latest developer version from GitHub) introduces the oTranCe-connector. The idea behind it : a small plug in grabs the used phrases/keys on the current page, and on click this list is submitted to oTranCe, where the translator can edit the words. This way the translator knows in which context these phrases are used. I wrote a small plug in for OXID eShop. Since it is really easy to implement, my hope is that other plug ins for other applications will be added by the community.

  Matthieu : Congratulations Daniel for having created such an awesome Translation Platform. At Piwik we are really thankful for oTranCe, which has resulted in much better translation process, and happier translators. Keep up the good work !

  If you are a Piwik user, and if you want to participate in translating Piwik, please sign up for an account on oTrance and become part of the team making Piwik available in more languages across the world.

• FFmpeg stream stops after a certain time

  7 avril 2021, par Anarno

  We have a little Nodejs app, which starts a stream process, with a child_process.spawn. On the client-side, we have an HTML5-canvas element, which records the video data new MediaRecorder(canvas.captureStream(30), config), then this client sends its data to our Nodejs server over a WebSocket connection. We using FFmpeg for video encoding and decoding, then we send the data to our 3-rd party service (MUX), which accepts the stream and broadcasts them. Sadly the process continuously loses its fps, and after in general 1 minute, stops with an interesting error code. (when we save the video result locally instead of streaming via rtmps, it works perfectly.

  


  *The whole system is in docker.

  


  The error :

  


   stderr: [tls @ 0x7f998e7bca40] Error in the pull function.&#xA;Our_app_logs:    | av_interleaved_write_frame(): I/O error    &#xA;Our_app_logs:    | [flv @ 0x7f998eeb1680] Failed to update header with correct duration.&#xA;Our_app_logs:    | [flv @ 0x7f998eeb1680] Failed to update header with correct filesize.&#xA;Our_app_logs:    | Error writing trailer of rtmps://global-live.mux.com/app/94e85197-78a3-f092-3437-03d93aba74e0: I/O error&#xA;Our_app_logs:    |  <buffer 5b="5b" 74="74" 6c="6c" 73="73" 20="20" 40="40" 30="30" 78="78" 37="37" 66="66" 39="39" 38="38" 65="65" 62="62" 63="63" 61="61" 34="34" 5d="5d" 45="45" 72="72" 6f="6f" 69="69" 6e="6e" 68="68" 70="70" 75="75" 2e="2e">&#xA;Our_app_logs:    | stderr: frame= 1478 fps= 25 q=23.0 Lsize=  &#xA;   402kB time=00:01:02.89 bitrate=  52.4kbits/s speed=1.05x&#xA;Our_app_logs:    | video:369kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 9.034639%&#xA;Our_app_logs:    |  <buffer 66="66" 72="72" 61="61" 6d="6d" 65="65" 3d="3d" 20="20" 31="31" 34="34" 37="37" 38="38" 70="70" 73="73" 32="32" 35="35" 71="71" 33="33" 2e="2e" 30="30" 4c="4c" 69="69" 7a="7a" 6b="6b" 42="42" 74="74">&#xA;Our_app_logs:    | stderr: [tls @ 0x7f998e7bca40]  <buffer 5b="5b" 6c="6c" 73="73" 20="20" 40="40" 30="30" 78="78" 37="37" 66="66" 39="39" 38="38" 65="65" 62="62" 63="63" 61="61" 34="34" 5d="5d">    &#xA;Our_app_logs:    | stderr: The specified session has been invalidated for some reason.&#xA;Our_app_logs:    |  <buffer 54="54" 68="68" 65="65" 20="20" 73="73" 70="70" 63="63" 69="69" 66="66" 64="64" 6f="6f" 6e="6e" 61="61" 62="62" 76="76" 6c="6c" 74="74" 72="72" 6d="6d">&#xA;Our_app_logs:    | stderr:     Last message repeated 1 times  &#xA;Our_app_logs:    |  <buffer 20="20" 4c="4c" 61="61" 73="73" 74="74" 6d="6d" 65="65" 67="67" 72="72" 70="70" 64="64" 31="31" 69="69" 0a="0a">  &#xA;Our_app_logs:    | stderr: [libx264 @ 0x7f998e790080]  <buffer 5b="5b" 6c="6c" 69="69" 62="62" 78="78" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 37="37" 66="66" 39="39" 38="38" 65="65" 5d="5d">&#xA;Our_app_logs:    | stderr: frame I:13    Avg QP: 5.39  size:  &#xA;2478&#xA;Our_app_logs:    |  <buffer 66="66" 72="72" 61="61" 6d="6d" 65="65" 20="20" 49="49" 3a="3a" 31="31" 33="33" 41="41" 76="76" 67="67" 51="51" 50="50" 35="35" 2e="2e" 39="39" 73="73" 69="69" 7a="7a" 32="32" 34="34" 37="37" 38="38" 0a="0a">&#xA;Our_app_logs:    | stderr: [libx264 @ 0x7f998e790080]  <buffer 5b="5b" 6c="6c" 69="69" 62="62" 78="78" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 37="37" 66="66" 39="39" 38="38" 65="65" 5d="5d">&#xA;Our_app_logs:    | stderr: frame P:1465  Avg QP:13.51  size:  &#xA; 235&#xA;Our_app_logs:    |  <buffer 66="66" 72="72" 61="61" 6d="6d" 65="65" 20="20" 50="50" 3a="3a" 31="31" 34="34" 36="36" 35="35" 41="41" 76="76" 67="67" 51="51" 33="33" 2e="2e" 73="73" 69="69" 7a="7a" 32="32" 0a="0a">&#xA;Our_app_logs:    | stderr: [libx264 @ 0x7f998e790080]  <buffer 5b="5b" 6c="6c" 69="69" 62="62" 78="78" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 37="37" 66="66" 39="39" 38="38" 65="65" 5d="5d">&#xA;Our_app_logs:    | stderr: mb I  I16..4: 99.2%  0.1%  0.7%    &#xA;Our_app_logs:    |  <buffer 6d="6d" 62="62" 20="20" 49="49" 31="31" 36="36" 2e="2e" 34="34" 3a="3a" 39="39" 32="32" 25="25" 30="30" 37="37" 0a="0a">        &#xA;Our_app_logs:    | stderr: [libx264 @ 0x7f998e790080]  <buffer 5b="5b" 6c="6c" 69="69" 62="62" 78="78" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 37="37" 66="66" 39="39" 38="38" 65="65" 5d="5d">&#xA;Our_app_logs:    | stderr: mb P  I16..4:  0.3%  0.0%  0.0%  P16..4:  0.1%  0.0%  0.0%  0.0%  0.0%    skip:99.6%&#xA;Our_app_logs:    |  <buffer 6d="6d" 62="62" 20="20" 50="50" 49="49" 31="31" 36="36" 2e="2e" 34="34" 3a="3a" 30="30" 33="33" 25="25">&#xA;Our_app_logs:    | stderr: [libx264 @ 0x7f998e790080]  <buffer 5b="5b" 6c="6c" 69="69" 62="62" 78="78" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 37="37" 66="66" 39="39" 38="38" 65="65" 5d="5d">&#xA;Our_app_logs:    | stderr: 8x8 transform intra:0.3% inter:17.3%&#xA;Our_app_logs:    |  <buffer 38="38" 78="78" 20="20" 74="74" 72="72" 61="61" 6e="6e" 73="73" 66="66" 6f="6f" 6d="6d" 69="69" 3a="3a" 30="30" 2e="2e" 33="33" 25="25" 65="65" 31="31" 37="37" 0a="0a">&#xA;Our_app_logs:    | stderr: [libx264 @ 0x7f998e790080]  <buffer 5b="5b" 6c="6c" 69="69" 62="62" 78="78" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 37="37" 66="66" 39="39" 38="38" 65="65" 5d="5d">&#xA;Our_app_logs:    | stderr: coded y,uvDC,uvAC intra: 1.4% 6.9% &#xA;4.7% inter: 0.0% 0.0% 0.0%&#xA;Our_app_logs:    |  <buffer 63="63" 6f="6f" 64="64" 65="65" 20="20" 79="79" 2c="2c" 75="75" 76="76" 44="44" 43="43" 41="41" 69="69" 6e="6e" 74="74" 72="72" 61="61" 3a="3a" 31="31" 2e="2e" 34="34" 25="25" 36="36" 39="39" 37="37" 30="30">&#xA;Our_app_logs:    | stderr: [libx264 @ 0x7f998e790080]  <buffer 5b="5b" 6c="6c" 69="69" 62="62" 78="78" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 37="37" 66="66" 39="39" 38="38" 65="65" 5d="5d">&#xA;Our_app_logs:    | stderr: i16 v,h,dc,p: 90%  5%  5%  0%&#xA;Our_app_logs:    |  <buffer 69="69" 31="31" 36="36" 20="20" 76="76" 2c="2c" 68="68" 64="64" 63="63" 70="70" 3a="3a" 39="39" 30="30" 25="25" 35="35" 0a="0a">&#xA;Our_app_logs:    | stderr: [libx264 @ 0x7f998e790080]  <buffer 5b="5b" 6c="6c" 69="69" 62="62" 78="78" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 37="37" 66="66" 39="39" 38="38" 65="65" 5d="5d">&#xA;Our_app_logs:    | stderr: i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% &#xA;18% 51%  6%  0%  0%  0%  0%  3%&#xA;Our_app_logs:    |  <buffer 69="69" 38="38" 20="20" 76="76" 2c="2c" 68="68" 64="64" 63="63" 6c="6c" 72="72" 75="75" 3a="3a" 32="32" 33="33" 25="25" 31="31" 35="35" 36="36" 30="30">&#xA;Our_app_logs:    | stderr: [libx264 @ 0x7f998e790080]  <buffer 5b="5b" 6c="6c" 69="69" 62="62" 78="78" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 37="37" 66="66" 39="39" 38="38" 65="65" 5d="5d">&#xA;Our_app_logs:    | stderr: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% &#xA;25% 40%  0%  0%  0%  0%  0%  0%&#xA;Our_app_logs:    |  <buffer 69="69" 34="34" 20="20" 76="76" 2c="2c" 68="68" 64="64" 63="63" 6c="6c" 72="72" 75="75" 3a="3a" 33="33" 25="25" 32="32" 35="35" 30="30">&#xA;Our_app_logs:    | stderr: [libx264 @ 0x7f998e790080]  <buffer 5b="5b" 6c="6c" 69="69" 62="62" 78="78" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 37="37" 66="66" 39="39" 38="38" 65="65" 5d="5d">&#xA;Our_app_logs:    | stderr: i8c dc,h,v,p: 86%  7%  6%  0%&#xA;Our_app_logs:    |  <buffer 69="69" 38="38" 63="63" 20="20" 64="64" 2c="2c" 68="68" 76="76" 70="70" 3a="3a" 36="36" 25="25" 37="37" 30="30" 0a="0a">&#xA;Our_app_logs:    | stderr: [libx264 @ 0x7f998e790080]  <buffer 5b="5b" 6c="6c" 69="69" 62="62" 78="78" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 37="37" 66="66" 39="39" 38="38" 65="65" 5d="5d">&#xA;Our_app_logs:    | stderr: Weighted P-Frames: Y:0.1% UV:0.1%  &#xA;Our_app_logs:    |  <buffer 57="57" 65="65" 69="69" 67="67" 68="68" 74="74" 64="64" 20="20" 50="50" 2d="2d" 46="46" 72="72" 61="61" 6d="6d" 73="73" 3a="3a" 59="59" 30="30" 2e="2e" 31="31" 25="25" 55="55" 56="56" 0a="0a">  &#xA;Our_app_logs:    | stderr: [libx264 @ 0x7f998e790080]  <buffer 5b="5b" 6c="6c" 69="69" 62="62" 78="78" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 37="37" 66="66" 39="39" 38="38" 65="65" 5d="5d">&#xA;Our_app_logs:    | stderr: kb/s:2041.23&#xA;Our_app_logs:    |  <buffer 6b="6b" 62="62" 2f="2f" 73="73" 3a="3a" 32="32" 30="30" 34="34" 31="31" 2e="2e" 33="33" 0a="0a">&#xA;Our_app_logs:    | stderr: Conversion failed!&#xA;Our_app_logs:    |  <buffer 43="43" 6f="6f" 6e="6e" 76="76" 65="65" 72="72" 73="73" 69="69" 20="20" 66="66" 61="61" 6c="6c" 64="64" 21="21" 0a="0a">&#xA;Our_app_logs:    | close, code: 1, signal: null&#xA;Our_app_logs:    | from react application: 14203&#xA;Our_app_logs:    | Status ok...&#xA;Our_app_logs:    | Data ok...&#xA;Our_app_logs:    | FFmpeg ok...&#xA;Our_app_logs:    | Writeable ok... <buffer c4="c4" 81="81" 0e="0e" 11="11" 00="00" 01="01" 61="61" c7="c7" 80="80" 5b="5b" b6="b6" 72="72" 03="03" bc="bc" b7="b7" de="de" 59="59" 7f="7f" 3c="3c" 27="27" b3="b3" 87="87" b2="b2" e6="e6" 84="84" d0="d0" f0="f0" 02="02" 2d="2d" c0="c0" 08="08" 70="70"> undefined&#xA;Our_app_logs:    | stderr: ffmpeg version 4.2.4 Copyright (c) &#xA;2000-2020 the FFmpeg developers&#xA;Our_app_logs:    |   built with gcc 9.2.0 (Alpine 9.2.0)&#xA;Our_app_logs:    |   configuration: --prefix=/usr --enable-avresample --enable-avfilter --enable-gnutls --enable-gpl --enable-libass --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libxvid --enable-libx264 --enable-libx265 --enable-libtheora --enable-libv4l2 --enable-postproc --enable-pic --enable-pthreads --enable-shared --enable-libxcb --disable-stripping --disable-static --disable-librtmp --enable-vaapi --enable-vdpau --enable-libopus --disable-debug&#xA;Our_app_logs:    |  <buffer 66="66" 6d="6d" 70="70" 65="65" 67="67" 20="20" 76="76" 72="72" 73="73" 69="69" 6f="6f" 6e="6e" 34="34" 2e="2e" 32="32" 43="43" 79="79" 68="68" 74="74" 28="28" 63="63" 29="29" 30="30" 2d="2d" 46="46">&#xA;Our_app_logs:    | stderr:   libavutil      56. 31.100 / 56. 31.100&#xA;Our_app_logs:    |   libavcodec     58. 54.100 / 58. 54.100   &#xA;Our_app_logs:    |   libavformat    58. 29.100 / 58. 29.100&#xA;Our_app_logs:    |   libavdevice    58.  8.100 / 58.  8.100&#xA;Our_app_logs:    |   libavfilter     7. 57.100 /  7. 57.100&#xA;Our_app_logs:    |   libavresample   4.  0.  0 /  4.  0.  0   &#xA;Our_app_logs:    |   libswscale      5.  5.100 /  5.  5.100   &#xA;Our_app_logs:    |   libswresample   3.  5.100 /  3.  5.100   &#xA;Our_app_logs:    |   libpostproc    55.  5.100 / 55.  5.100   &#xA;Our_app_logs:    |  <buffer 20="20" 6c="6c" 69="69" 62="62" 61="61" 76="76" 75="75" 74="74" 35="35" 36="36" 2e="2e" 33="33" 31="31" 30="30" 2f="2f" 0a="0a" 63="63" 6f="6f">&#xA;Our_app_logs:    | stderr: [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    |     Last message repeated 4 times&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] no frame!&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    |  <buffer 5b="5b" 68="68" 32="32" 36="36" 34="34" 20="20" 40="40" 30="30" 78="78" 37="37" 66="66" 39="39" 5d="5d" 6e="6e" 6f="6f" 2d="2d" 65="65" 69="69" 73="73" 74="74" 67="67" 50="50" 53="53" 31="31" 72="72">&#xA;Our_app_logs:    | stderr: [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] no frame!&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] no frame!&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] no frame!&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    |     Last message repeated 5 times&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] no frame!&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] no frame!&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_headerOur_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] no frame!&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] no frame!&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] non-existing PPS 14 referenced&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] decode_slice_header error&#xA;Our_app_logs:    | [h264 @ 0x7f299f44f600] no frame!&#xA;&#xA;</buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer></buffer>

  


  The FFmpeg config :

  


  const FFMPEG_CONFIG = [
  '-i',
  '-',

  // video codec config: low latency, adaptive bitrate
  //   '-vcodec',
  //   'copy',
  '-c:v',
  'libx264',
  '-preset',
  'veryfast',
  '-tune',
  'zerolatency',

  // audio codec config: sampling frequency (11025, 22050, 44100), bitrate 64 kbits
  '-c:a',
  'aac',
  '-ar',
  '44100',
  '-b:a',
  '64k',

  //force to overwrite
  '-y',

  // used for audio sync
  '-use_wallclock_as_timestamps',
  '1',
  '-async',
  '1',

  //'-filter_complex', 'aresample=44100', // resample audio to 44100Hz, needed if input is not 44100
  //'-strict', 'experimental',
  '-bufsize',
  '1000',
  '-f',
  'flv',
];


  


  The process :

  


  const process = child_process.spawn('ffmpeg', [
      ...FFMPEG_CONFIG,
      //   'local.bin',
      url,
    ]);
 
    process.stderr.on('data', data => {
      console.log(`stderr: ${data}`, data);
    });

    process.stdin.on('error', e => {
      console.log('FFmpeg STDIN Error', e);
    });

    process.on('error', err => console.log(err));

    process.on('close', (code, signal) => {
      console.log(`close, code: ${code}, signal: ${signal}`);
    });


  


  The writing :

  


  if (!Buffer.isBuffer(data)) return;
if (!process.stdin.writable) return;
process.stdin.write(data);


  


• Is it possible to set up ffmpeg as a repeater ?

  15 janvier 2021, par DigitalDisaster

  I am using this PyLivestream library to stream files to youtube. the problem is that once it finishes each video the scren goes down for a second until the next video starts. because it's simply just creating ffmpeg command and running then directly in a subprocess for each media file.

  


  Is it possible to configure an instance of ffmpeg that will always be streaming to the destination. It could just be a blank screen or an image. And it also has an input, so I can point PyLivestream to the repeater.

  


  This way the repeater will create one long un-interupted stream experience, but I can still use PyLivestream to stream the individual files.