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• How can I remove silence of a video ? [closed]

  23 septembre 2024, par Alex

  I wanted to automatically remove the silence from some of my videos.

  


  I found the following command by searching :

  


  ffmpeg -i C:\Users\`*`myusername`*`\Desktop\videowithsielence.mp4 -af silenceremove=1:0:-50dB C:\Users\`*`myusername`*`\Desktop\newvideo.mp4


  


  There isn't any error and this is the following output :

  


  ffmpeg version N-117094-g2bf588f273-20240921 Copyright (c) 2000-2024 the FFmpeg developers
  built with gcc 14.2.0 (crosstool-NG 1.26.0.106_ed12fa6)
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-libxml2 --enable-lzma --enable-fontconfig --enable-libharfbuzz --enable-libvorbis --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth --enable-chromaprint --enable-libdav1d --enable-libdavs2 --enable-libdvdread --enable-libdvdnav --disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-libkvazaar --enable-libaribcaption --enable-libass --enable-libbluray --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist --enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp --enable-libzmq --enable-lv2 --enable-libvpl --enable-openal --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm --enable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc --enable-libplacebo --enable-libvvenc --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-libs=-lgomp --extra-ldflags=-pthread --extra-ldexeflags= --cc=x86_64-w64-mingw32-gcc --cxx=x86_64-w64-mingw32-g++ --ar=x86_64-w64-mingw32-gcc-ar --ranlib=x86_64-w64-mingw32-gcc-ranlib --nm=x86_64-w64-mingw32-gcc-nm --extra-version=20240921
  libavutil      59. 37.100 / 59. 37.100
  libavcodec     61. 17.100 / 61. 17.100
  libavformat    61.  6.100 / 61.  6.100
  libavdevice    61.  2.101 / 61.  2.101
  libavfilter    10.  3.100 / 10.  3.100
  libswscale      8.  2.100 /  8.  2.100
  libswresample   5.  2.100 /  5.  2.100
  libpostproc    58.  2.100 / 58.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\*myusername*\Desktop\stille.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf61.1.100
  Duration: 00:00:17.60, start: 0.000000, bitrate: 14994 kb/s
  Stream #0:0[0x1](und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 14915 kb/s, 60 fps, 60 tbr, 15360 tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 83 kb/s (default)
      Metadata:
        handler_name    : SoundHandler
        vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 000002b596997d00] using SAR=1/1
[libx264 @ 000002b596997d00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 000002b596997d00] profile High, level 4.2, 4:2:0, 8-bit
[libx264 @ 000002b596997d00] 264 - core 164 - H.264/MPEG-4 AVC codec - Copyleft 2003-2024 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=18 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'C:\Users\*myusername*\Desktop\Aufzeich.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf61.6.100
  Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 60 fps, 15360 tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
        encoder         : Lavc61.17.100 libx264
      Side data:
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
  Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
      Metadata:
        handler_name    : SoundHandler
        vendor_id       : [0][0][0][0]
        encoder         : Lavc61.17.100 aac
[out#0/mp4 @ 000002b594b08800] video:2969KiB audio:180KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 0.825545%
frame= 1055 fps=236 q=-1.0 Lsize=    3174KiB time=00:00:16.54 bitrate=1571.3kbits/s speed= 3.7x
[libx264 @ 000002b596997d00] frame I:5     Avg QP:14.66  size:136185
[libx264 @ 000002b596997d00] frame P:351   Avg QP:18.48  size:  6338
[libx264 @ 000002b596997d00] frame B:699   Avg QP:25.92  size:   191
[libx264 @ 000002b596997d00] consecutive B-frames:  1.5%  6.1% 73.1% 19.3%
[libx264 @ 000002b596997d00] mb I  I16..4: 61.0% 21.9% 17.2%
[libx264 @ 000002b596997d00] mb P  I16..4:  0.2%  0.1%  0.0%  P16..4:  4.8%  0.8%  0.8%  0.0%  0.0%    skip:93.4%
[libx264 @ 000002b596997d00] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  2.0%  0.0%  0.0%  direct: 0.0%  skip:98.0%  L0:75.0% L1:22.4% BI: 2.5%
[libx264 @ 000002b596997d00] 8x8 transform intra:22.8% inter:38.2%
[libx264 @ 000002b596997d00] coded y,uvDC,uvAC intra: 57.3% 73.0% 56.4% inter: 1.0% 1.0% 0.1%
[libx264 @ 000002b596997d00] i16 v,h,dc,p: 31% 25% 32% 12%
[libx264 @ 000002b596997d00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 21% 42%  2%  2%  2%  2%  3%  3%
[libx264 @ 000002b596997d00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 31% 22%  2%  2%  2%  2%  2%  3%
[libx264 @ 000002b596997d00] i8c dc,h,v,p: 41% 32% 13% 13%
[libx264 @ 000002b596997d00] Weighted P-Frames: Y:0.3% UV:0.0%
[libx264 @ 000002b596997d00] ref P L0: 68.2%  7.2% 20.4%  4.2%  0.0%
[libx264 @ 000002b596997d00] ref B L0: 79.0% 18.8%  2.2%
[libx264 @ 000002b596997d00] ref B L1: 98.4%  1.6%
[libx264 @ 000002b596997d00] kb/s:1382.74
[aac @ 000002b596a4f680] Qavg: 21440.516


  


  But the new video is exactly the same as the first one. I also tried changing the 50dB number but that didn't work either... My question is "Why ?" and "How can I fix this ?"...

  


• MoviePy write_videofile is very slow. Why ?

  5 novembre 2024, par RukshanJS

  I've seen multiple questions on SO relating with this, but couldn't find a solid answer. The following is my code.

  


  async def write_final_video(clip, output_path, results_dir):
    cpu_count = psutil.cpu_count(logical=False)
    threads = max(1, min(cpu_count - 1, 16))

    os.makedirs(results_dir, exist_ok=True)

    output_params = {
        "codec": await detect_hardware_encoder(),
        "audio_codec": "aac",
        "fps": 24,
        "threads": threads,
        "preset": "medium",
        "bitrate": "5000k",
        "audio_bitrate": "192k",
    }

    logger.info(f"Starting video writing process with codec: {output_params['codec']}")
    try:
        await asyncio.to_thread(
            clip.write_videofile,
            output_path,
            **output_params,
        )
    except Exception as e:
        logger.error(f"Error during video writing with {output_params['codec']}: {str(e)}")
        logger.info("Falling back to libx264 software encoding")
        output_params["codec"] = "libx264"
        output_params["preset"] = "medium"
        try:
            await asyncio.to_thread(
                clip.write_videofile,
                output_path,
                **output_params,
            )
        except Exception as e:
            logger.error(f"Error during fallback video writing: {str(e)}")
            raise
    finally:
        logger.info("Video writing process completed")

    # Calculate and return the relative path
    relative_path = os.path.relpath(output_path, start=os.path.dirname(ARTIFACTS_DIR))
    return relative_path


  


  and the helper function to get encoder is below

  


  async def detect_hardware_encoder():
    try:
        result = await asyncio.to_thread(
            subprocess.run,
            ["ffmpeg", "-encoders"],
            capture_output=True,
            text=True
        )

        # Check for hardware encoders in order of preference
        if "h264_videotoolbox" in result.stdout:
            return "h264_videotoolbox"
        elif "h264_nvenc" in result.stdout:
            return "h264_nvenc"
        elif "h264_qsv" in result.stdout:
            return "h264_qsv"

        return "libx264"  # Default software encoder
    except Exception:
        logger.warning("Failed to check for hardware acceleration. Using default encoder.")
        return "libx264"


  


  This code makes the rendering of a 15s video around 6min+ which is not acceptable.

  


  t:  62%|██████▏   | 223/361 [04:40<03:57,  1.72s/it, now=None]

  


  My config is MPS (Apple Silicon Metal Performance Shader), but also should work with NVIDIA CUDA.

  


  How can I reduce the time to write the video ? How to actually reduce this long time to write the file ?

  


  The question is about optimizing MoviePy's video processing pipeline, not just FFmpeg :

  


  

  1. clip is a MoviePy VideoFileClip object handling video processing before FFmpeg encoding

  


  2. write_videofile() is MoviePy's method that manages the entire rendering pipeline including :

     

     • Frame extraction and processing

     


     • Memory management

     


     • Multiprocessing coordination

     


     • Audio synchronization

     


     


  


  


  Source - https://zulko.github.io/moviepy/getting_started/videoclips.html#video-files-mp4-webm-ogv

  


  Other places where this is asked,

  


  

  • https://github.com/Zulko/moviepy/issues/2039

  


  


• Converting HLS Stream to stream supported by old radio

  29 novembre 2024, par Alberto Faenza

  I have an old internet radio that does not support HLS streams.
Therefore I cannot listen to my favourite radio at this url :
https://streamcdnf31-4c4b867c89244861ac216426883d1ad0.msvdn.net/radiodeejay/radiodeejay/master_ma.m3u8

  


  I found a solution using a paid software https://minimradio.com/ which is based on minimserver and minimstreamer.

  


  This solution works if I install mininmserver and minimstreamer on a local computer and use the internet radio to point to the converter stream but I will have to pay if I want to use this.

  


  Checking the documentation of minimradio and ministreamer I can see the following :

  


  *Some internet radios can play the previous AAC ADTS streams but can't play these new HLS streams
...

  


  If the network stream URL points to an HLS .m3u8 master playlist or media playlist file, MinimStreamer reads this file and uses the HLS protocol to read the stream audio data and send it to the music player as a conventional HTTP stream. This makes the stream playable on music players that don't support the HLS protocol. The audio data in the stream must be encoded in AAC format.*
and not a single destination receiver I should use a streaming (broadcasting) server. What can I use to do that ?

  


  My question is the following :
Is there a way to replicate what minimstreamer is doing using ffmpeg ?
I have tried this :

  


  


  ffmpeg -re -i https://streamcdnf31-4c4b867c89244861ac216426883d1ad0.msvdn.net/radiodeejay/radiodeejay/master_ma.m3u8 -c copy -listen 1 -f mpegts http://192.168.1.9:10000

  


  


  which is playing corrctly in local vlc on the same computer. But when I stop VLC is got this error in ffmpeg :

  


  [https @ 00000291de047400] Cannot reuse HTTP connection for different host: StreamCdnG20-4c4b867c89244861ac216426883d1ad0.msvdn.net:-1 != 4c4b867c89244861ac216426883d1ad0.msvdn.net:-1
[hls @ 00000291dd96d140] keepalive request failed for 'https://4c4b867c89244861ac216426883d1ad0.msvdn.net/radiodeejay/radiodeejay/play1.m3u8' with error: 'Invalid argument' when parsing playlist
[hls @ 00000291dd96d140] Opening 'https://4c4b867c89244861ac216426883d1ad0.msvdn.net/radiodeejay/radiodeejay/play1.m3u8' for reading
[hls @ 00000291dd96d140] Skip ('#EXT-X-DISCONTINUITY-SEQUENCE:0')
[hls @ 00000291dd96d140] Skip ('#EXT-X-PROGRAM-DATE-TIME:2024-11-29T06:36:56.926Z')
[hls @ 00000291dd96d140] Skip ('#EXT-X-PROGRAM-DATE-TIME:2024-11-29T06:37:07.314Z')
[hls @ 00000291dd96d140] Skip ('#EXT-X-PROGRAM-DATE-TIME:2024-11-29T06:37:17.571Z')
[https @ 00000291de4e00c0] Opening 'https://StreamCdnG20-4c4b867c89244861ac216426883d1ad0.msvdn.net/radiodeejay/radiodeejay/20240722T095729_p1s_001086632.ts' for reading
[aost#0:0/copy @ 00000291de1c4f40] Error submitting a packet to the muxer: Error number -10054 occurred
    Last message repeated 1 times
[out#0/mpegts @ 00000291deaa7e40] Error muxing a packet
[out#0/mpegts @ 00000291deaa7e40] Task finished with error code: -10054 (Error number -10054 occurred)
[out#0/mpegts @ 00000291deaa7e40] Terminating thread with return code -10054 (Error number -10054 occurred)
[out#0/mpegts @ 00000291deaa7e40] Error writing trailer: Error number -10054 occurred
[http @ 00000291de8870c0] URL read error: Error number -10054 occurred
[out#0/mpegts @ 00000291deaa7e40] Error closing file: Error number -10054 occurred
[out#0/mpegts @ 00000291deaa7e40] video:0KiB audio:797KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 21.849292%
size=     971KiB time=00:00:50.98 bitrate= 156.0kbits/s speed=1.01x
Conversion failed!


  


  And if I try to connect from my internet radio I immediately got this error :

  


  [aost#0:0/copy @ 0000027081584a40] Error submitting a packet to the muxer: Error number -10053 occurred
    Last message repeated 1 times
[out#0/mpegts @ 0000027081e684c0] Error muxing a packet
[out#0/mpegts @ 0000027081e684c0] Task finished with error code: -10053 (Error number -10053 occurred)
[out#0/mpegts @ 0000027081e684c0] Terminating thread with return code -10053 (Error number -10053 occurred)
[out#0/mpegts @ 0000027081e684c0] Error writing trailer: Error number -10053 occurred
[http @ 0000027081c47680] URL read error: Error number -10053 occurred
[out#0/mpegts @ 0000027081e684c0] Error closing file: Error number -10053 occurred
[out#0/mpegts @ 0000027081e684c0] video:0KiB audio:46KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 13.917515%
size=      52KiB time=00:00:02.94 bitrate= 145.1kbits/s speed= 1.2x
Conversion failed!


  


  What is the correct way to stream this one locally in order to be listened in my internet radio ?
Shall I use ffmpeg or can be done directly with ngnix ? Or shall I use both ?