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• Download from YouTube as ".wav" instead of ".webm"

  11 août 2022, par Bastian Gerjol

  I am trying to extract an audio from a YouTube Video as an .wav file.
However, the script that I am running keeps giving me .webm files.
The code I am using is the following :

  


  from __future__ import unicode_literals
import youtube_dl

ydl_opts = {
    'format': 'bestaudio/best',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'wav',
        'preferredquality': '192'
    }],
    'postprocessor_args': [
        '-ar', '16000'
    ],
    'prefer_ffmpeg': True,
    'keepvideo': True
}

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download(['https://www.youtube.com/watch?v=2Xq7iJKzhR4'])


  


  Is there a way to change the output and keep the highest possible audio quality ?

  


  I tried setting prefer_ffmpeg': True to False & keepvideo': True to False but that did not change anything.

  


  I would appreciate suggestions and please keep in mind that I never used Python before.

  


• ffmpeg throws "cur_dts is invalid" error when trying to get stream from IP camera

  17 octobre 2022, par Max

  I'm trying to stream from an IP camera with the following ffmpeg command :

  


  const command = [
        '-loglevel',
        'debug',
        '-timeout',
        '10000000',
        '-rtsp_transport',
        'tcp',
        '-i',
        this.cameraInfo.url,
        '-c:v',
        'copy',
        '-c:a',
        'aac',
        '-f',
        'mp4',
        '-movflags',
        '+faststart+frag_every_frame+empty_moov+default_base_moof',
        "-min_frag_duration",
        this.livestreamSegmentDuration,
        'pipe:1',
    ];


  


  With this command I pass an output to another stream transformer and stream as HLS using "mp4" instead of "ts" to avoid transcoding.

  


  Everything works smoothly with different cams, but when I try to get the stream from "Meldana" (issue is related to all ip cameras of this manufacturer), it constantly throws the following error and does not stream :

  


  cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:1 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:1 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:1 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:1 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:1 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:1 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:1 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)


  


  Even though it does not work with ffmpeg, I can watch the stream just fine in VLC.
What might be the problem ? Is there anything that could be corrected in the ffmpeg command ?

  


• FFMPEG bash > folder processing > AI upscale - script ERROR ">" [closed]

  13 novembre 2022, par Jason Paul Michaels

  Trying to port a single file manual command from Topaz AI so I can run it as a part of a simple script allowing me to run multiple sessions from terminal. I am running MacOS with BASH 5.2 and when I run the script I get dumped to ">" instead of command prompt and no error message is displayed.

  


  This is my command -

  


  for f in *.mp4; do
  /Applications/Topaz\ Video\ AI.app/Contents/MacOS/ffmpeg \
    -hide_banner \
    -nostdin \
    -y \
    -nostats \
    -i “$f” \
    -vsync 0 \
    -avoid_negative_ts 1 \
    -sws_flags spline+accurate_rnd+full_chroma_int \
    -color_trc 1 \
    -colorspace 1 \
    -color_primaries 1 \
    -filter_complex veai_up=model=prob-3:scale=0:w=1920:h=1080:preblur=0:noise=0:details=0:halo=0:blur=0:compression=0:estimate=20:device=0:vram=1:instances=1,scale=w=1920:h=1080:flags=lanczos:threads=0,scale=out_color_matrix=bt709 \
    -c:v prores_videotoolbox \
    -profile:v lt \
    -pix_fmt p210le \
    -allow_sw 1 \
    -map_metadata 0 \
    -movflags frag_keyframe+empty_moov+delay_moov+use_metadata_tags+write_colr \
    -map_metadata:s:v 0:s:v \
    -map_metadata:s:a 0:s:a \
    -c:a aac \
    "encoded/${f%.*}.mp4”;
done


  


  I have a feeling it's something really simple I'm missing but I've gone through it a dozen times and can't seem to modify in any way to success.

  


  Thank you !

  


  Getting dumped back to ">" terminal prompt.