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• ffmpeg h264_nvenc error [Cannot init Cuda] on NVidia Quadro p620

  13 septembre 2018, par Vitor Silva de Deus

  I’ve installed the nv-codec-headers from https://git.videolan.org/git/ffmpeg/nv-codec-headers.git. whit :

  cd nv-codec-headers && make && sudo make install

  Then I got ffmpeg from https://git.ffmpeg.org/ffmpeg.git and compiled with :

  cd ffmpeg && PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure   --prefix="$HOME/ffmpeg_build"   --pkg-config-flags="--static"   --extra-cflags="-I$HOME/ffmpeg_build/include"   --extra-ldflags="-L$HOME/ffmpeg_build/lib"   --extra-libs="-lpthread -lm"   --bindir="$HOME/bin"   --enable-gpl   --enable-libaom   --enable-libass   --enable-libfdk-aac   --enable-libfreetype   --enable-libmp3lame   --enable-libopus   --enable-libvorbis   --enable-libvpx   --enable-libx264   --enable-libx265   --enable-nonfree --enable-cuda --enable-cuvid --enable-nvenc --enable-nonfree --enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64  && PATH="$HOME/bin:$PATH" make && make install && hash -r

  When I run :

  ffmpeg -hex -rtsp_transport tcp -t 1800 -r 30 -i rtsp://stream_url -c:v h264_nvenc -s:v 360x180 -vsync 0 -preset slow outfile.mp4

  ffmpeg breaks and logs :

  [aac @ 0x5636a2d9f540] Too many bits 8832.000000 > 6144 per frame
  requested, clamping to max

  [swscaler @ 0x5636a33e7840] deprecated pixel format used, make sure
  you did set range correctly

  [h264_nvenc @ 0x5636a2da2880] Cannot init CUDA

  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

  [aac @ 0x5636a2d9f540] Qavg : -nan

  [aac @ 0x5636a2d9f540] 1 frames left in the queue on closing
  Conversion failed !

  OS : Ubuntu Server 18.04

  ffmpeg version : N-91936-g776cdd1dc8 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)

  CUDA version : 9.2

  GPU Device : Dual NVIDIA Quadro P620, 2 GB, 4 mDP

  Any suggestion on how can i debug or what I’m doing wrong ?! Many thanks !

• Missing audio stream which is required by this ffm at Raspberry PI using ffmpeg

  17 mai 2014, par batuman

  I am trying to stream video from my Raspberry PI using ffserver, raspivid and ffmpeg. My command is as follow

  ffserver -f /etc/ffserver.conf & raspivid -vf -t 0 -w 450 -h 200 -fps 25 -b 2000000 -o - | ffmpeg -f h264 -r 25 -c:v h264 -i - -c:v libx264 -c:a libmp3lame http://localhost:8090/feed1.ffm

  It looks working, I see the video displayed on the monitor and got the error as

  Missing audio stream which is required by this ffm

  The whole output at console is as follow.

  ffmpeg version 2.2.git Copyright (c) 2000-2014 the FFmpeg developers
  
    built on May 10 2014 17:04:06 with gcc 4.6 (Debian 4.6.3-14+rpi1)
  
    configuration: --prefix=/home/pi/ffmpeg_build --extra-cflags=-I/home/pi/ffmpeg_build/include --extra-ldflags=-L/home/pi/ffmpeg_build/lib --bindir=/home/pi/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab
  
    libavutil      52. 82.100 / 52. 82.100
  
    libavcodec     55. 60.103 / 55. 60.103
  
    libavformat    55. 37.102 / 55. 37.102
  
    libavdevice    55. 13.101 / 55. 13.101
  
    libavfilter     4.  5.100 /  4.  5.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, h264, from 'pipe:':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (High), yuv420p, 450x200, 25 fps, 25 tbr, 1200k tbn, 50 tbc
  
  Sat May 17 07:10:56 2014 127.0.0.1 - - [GET] "/feed1.ffm HTTP/1.1" 200 4175
  
  Missing audio stream which is required by this ffm

  I searched and found that I have to use blank audio using libmp3lame. Is it the only way to do ?And can’t find installer for linux for libmp3lame.

• ffmpeg - escaping single quotes doesn't work [duplicate]

  18 septembre 2022, par XorOrNor

  I've written a small python script for mass converting audio files. It uses ffmpeg. The problem is it doesn't work for files with single quotes in their filenames.

  


  script :

  


  
import os
import subprocess
import sys
from multiprocessing.pool import ThreadPool as Pool

source_dir="/home/kris/Music/test"
output_dir="/home/kris/Music/test_opus"

def worker(file):

    try:    
        dirname=os.path.dirname(file)
        file=file.replace("'","\\\\'")
        filename=file.split('.flac')[0]
        
        input_file=f"'{source_dir}/{file}'"
        output_file=f"'{output_dir}/{filename}.opus'"
        cmd="ffmpeg -n -i "+input_file+" -c:a libopus -b:a 320k "+output_file
        print(cmd)
        result = subprocess.call(cmd,stdout=subprocess.PIPE,shell=True)
    except:
        print('item error')
        

def start():    
    threads=os.cpu_count()  
    pool = Pool(threads)
    files=os.listdir(source_dir)
    for item in files:
        pool.apply_async(worker, (item,))

    pool.close()
    pool.join()
        
start()



  


  Testing :

  


  


  1. Filename : I'm a file.flac

     


  


  2. When escaping single quote ' with double backslashes \\ - file=file.replace("'","\\\\'") the cmd for ffmpeg is :

     


  


  


  ffmpeg -n -i '/home/kris/Music/test/I\\'m a file.flac' -c:a libopus -b:a 320k '/home/kris/Music/test_opus/I\\'m a file.opus'


  


  ffmpeg returns an error : /home/kris/Music/test/I\\m: No such file or directory

  


  

  3. When escaping single quote ' with a single backslash \ - file=file.replace("'","\\'") the cmd for ffmpeg is :

  


  


  ffmpeg -n -i '/home/kris/Music/test/I\'m a file.flac' -c:a libopus -b:a 320k '/home/kris/Music/test_opus/I\'m a file.opus'


  


  I got an error :

  


  /bin/sh: 1: Syntax error: Unterminated quoted string


  


  According to ffmpeg docs : https://ffmpeg.org/ffmpeg-utils.html#toc-Examples escaping with single backslash should work.