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• Manim error : It's a sound problem that I haven't seen anywhere else

  2 avril 2024, par Nεo Pλατo

  I've been using Manim for about a month now, and with already existing impediments to my progress none has been more painful than the lack of sound when I got to this part of Theorem of Beethoven's tutorial. I've been struggling with it for three weeks and opened issues on GitHub and Reddit without any success.

  


  So the code looks like this :

  


  class AudioTest(Scene):
    def construct(self):
        group_dots=VGroup(*[Dot()for _ in range(3)])
        group_dots.arrange_submobjects(RIGHT)
        for dot in group_dots:
            self.add_sound("click_this_and_nothing_else",gain=-10)
            self.add(dot)
            self.wait()
            self.wait()


  


  And the error message is a bit long and I'm still cracking at what it actually means. Here it is :

  


  C:\Manim\manim-18june>python manim.py tutorial\7_add_audio.py AudioTest -pm
Media will be written to C:/Users/NeoPlato/Videos/manim_videos\. You can change this behavior with the --media_dir flag.


Traceback (most recent call last):
  File "C:\Manim\manim-18june\manimlib\extract_scene.py", line 155, in main
    scene = SceneClass(**scene_kwargs)
  File "C:\Manim\manim-18june\manimlib\scene\scene.py", line 79, in __init__
    self.file_writer.finish()
  File "C:\Manim\manim-18june\manimlib\scene\scene_file_writer.py", line 379, in finish
    self.combine_movie_files()
  File "C:\Manim\manim-18june\manimlib\scene\scene_file_writer.py", line 506, in combine_movie_files
    self.audio_segment.export(
  File "C:\Users\allan\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pydub\audio_segment.py", line 911, in export
    raise CouldntEncodeError(
pydub.exceptions.CouldntEncodeError: Encoding failed. ffmpeg/avlib returned error code: 1

Command:['ffmpeg', '-y', '-f', 'wav', '-i', 'C:\\Users\\NEOPLATO~1.000\\AppData\\Local\\Temp\\tmpk6j8yj98', '-b:a', '312k', '-f', 'mp3', 'C:\\Users\\NEOPLATO~1.000\\AppData\\Local\\Temp\\tmpyn225uxk']

Output from ffmpeg/avlib:

ffmpeg version git-2020-06-17-0b3bd00 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200523
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
--enable-amf
  libavutil      56. 55.100 / 56. 55.100
  libavcodec     58. 92.100 / 58. 92.100
  libavformat    58. 46.101 / 58. 46.101
  libavdevice    58. 11.100 / 58. 11.100
  libavfilter     7. 86.100 /  7. 86.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from 'C:\Users\NEOPLATO~1.000\AppData\Local\Temp\tmpk6j8yj98':
  Duration: 00:00:04.23, bitrate: 2822 kb/s
    Stream #0:0: Audio: pcm_s32le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s32, 2822 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s32le (native) -> mp3 (mp3_mf))
Press [q] to stop, [?] for help
[mp3_mf @ 011be000] could not find any MFT for the given media type
[mp3_mf @ 011be000] could not create MFT
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!



I do have a larger documentation of the problem with current progress [over at GitHub](https://github.com/3b1b/manim/issues/1152)

>Help
>>Me
>>>Please :(
>>>>Pardon my naive looking formatting, I'm new to Markdown


  


• Problem with adding tags to ffmpeg m3u8 file

  23 février 2021, par reza imany

  i tried to generate a hls file in ffmpeg and here is the result :

  


  #EXT-X-VERSION:3
#EXT-X-STREAM-INF:BANDWIDTH=400400,RESOLUTION=284x160,CODECS="avc1.64000c,mp4a.40.2"
160p/index.m3u8

  


  #EXT-X-STREAM-INF:BANDWIDTH=875600,RESOLUTION=640x360,CODECS="avc1.64001e,mp4a.40.2"
360p/index.m3u8

  


  but i need to add a custom header tag like "Name" to it

  


  here is my desired export :

  


  #EXT-X-VERSION:3
#EXT-X-STREAM-INF:BANDWIDTH=400400,RESOLUTION=284x160,Name="160p",CODECS="avc1.64000c,mp4a.40.2"
160p/index.m3u8

  


  #EXT-X-STREAM-INF:BANDWIDTH=875600,RESOLUTION=640x360,Name="360p",CODECS="avc1.64001e,mp4a.40.2"
360p/index.m3u8

  


  how can i do that ? Please HELP !

  


• ffmpeg problem video duration of an hour and a half

  14 mai 2024, par Bruno Munné

  When start record i call an api /start-record which does :

  


  const ffmpeg = spawn("ffmpeg", [
        "-i",
        rtsp,
        "-c:v",
        "copy",
        "-an",
        "-f",
        "flv",
        `${filename}.flv`,
      ]);
ffmpegProcesses[rtsp] = {
        process: ffmpeg,
        filename,
      };


  


  When stop the record i call an api /stop-record which does :

  


  ffmpegProcesses[rtsp].process.kill("SIGKILL");
ffmpegProcesses[rtsp].process.on("exit", async () => {
   const ffmpeg = spawn("ffmpeg", [
          "-i",
          `${filename}.flv`,
          "-c:v",
          "libx264",
          "-preset",
          "fast",
          "-crf",
          "30",
          "-an",
          `${filename}.mp4`,
        ]);

    ffmpeg.on("exit", async () => {
        uploadToS3()
    })

})


  


  If the recording is less than or equal to approximately 1 hour it works perfectly, but if the recording is 1 and a half hours it already breaks and it does not correctly generate the files, nor the flv nor the conversion to mp4

  


  I hope my program works the same way it does for 1 hour recordings