Recherche avancée

Sur d’autres sites (5357)

• FFMPEG hangs (sometimes) when trying to take a photo from USB camera ?

  13 mai 2022, par dezman

  I am attempting to write a script that takes a photo every 3 seconds from camera source "1", the -pix_fmt I think is unique to my USB camera.

  


  Here is the script :

  


  #!/bin/bash

set -e

while :
do
  nice_num=$(date +%s)
  
  ffmpeg -ss 00:00:00 -f avfoundation -pix_fmt yuyv422 -r 30.000030 -i "1" -t 1 -frames:v 1 -q:v 2 "image_$nice_num_%03d.jpg"
  
  wait

  sleep 3
done


  


  The issue is half the time it successfully takes the photo, and half the time it just hangs forever echoing this (not useful) :

  


  ffmpeg version 5.0.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with Apple clang version 13.1.6 (clang-1316.0.21.2)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/5.0.1 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  libavutil      57. 17.100 / 57. 17.100
  libavcodec     59. 18.100 / 59. 18.100
  libavformat    59. 16.100 / 59. 16.100
  libavdevice    59.  4.100 / 59.  4.100
  libavfilter     8. 24.100 /  8. 24.100
  libswscale      6.  4.100 /  6.  4.100
  libswresample   4.  3.100 /  4.  3.100
  libpostproc    56.  3.100 / 56.  3.100


  


  Then I CTRL-C 3 times and get :

  


  ^C^C^CReceived > 3 system signals, hard exiting


  


  Other methods of "taking a photo every n seconds from bash" are also appreciated.

  


• Should I use aevalsrc or anullsrc ? I got flooded with "cur_dts is invalid st:0" or "Delay between the first packet", encoding stalls at frame 127

  28 avril 2022, par jokoon

  Context : this command is generated with a python script, it aims at concatenating different small videos of different format, with a 0.5s pause, considering some video don't have an audio track.

  


  ffmpeg.exe
-report
-i
input0.mp4
-i
input1.mp4
-i
input2.mp4
-i
input3.mp4
-i
input4.mp4
-i
input5.mp4
-i
input6.mp4
-i
input7.mp4
-i
input8.mp4
-f
lavfi
-i
color=c=black:s=480x270:d=0.5:r=24,format=yuv420p
-f
lavfi
-i
anullsrc
-filter_complex_script
filter_complex_script.txt
-map
[final_video]
-map
[final_audio]
-c:a
aac
concatenated-2022-04-27--23-53.mp4


  


  —

  


  [0]fps=24[fps0];
[fps0]scale=480:270:force_original_aspect_ratio=decrease,pad=480:270:-1:-1,setsar=1[rescaled0];
[1]fps=24[fps1];
[fps1]scale=480:270:force_original_aspect_ratio=decrease,pad=480:270:-1:-1,setsar=1[rescaled1];
[2]fps=24[fps2];
[fps2]scale=480:270:force_original_aspect_ratio=decrease,pad=480:270:-1:-1,setsar=1[rescaled2];
[3]fps=24[fps3];
[fps3]scale=480:270:force_original_aspect_ratio=decrease,pad=480:270:-1:-1,setsar=1[rescaled3];
[4]fps=24[fps4];
[fps4]scale=480:270:force_original_aspect_ratio=decrease,pad=480:270:-1:-1,setsar=1[rescaled4];
[5]fps=24[fps5];
[fps5]scale=480:270:force_original_aspect_ratio=decrease,pad=480:270:-1:-1,setsar=1[rescaled5];
[6]fps=24[fps6];
[fps6]scale=480:270:force_original_aspect_ratio=decrease,pad=480:270:-1:-1,setsar=1[rescaled6];
[7]fps=24[fps7];
[fps7]scale=480:270:force_original_aspect_ratio=decrease,pad=480:270:-1:-1,setsar=1[rescaled7];
[8]fps=24[fps8];
[fps8]scale=480:270:force_original_aspect_ratio=decrease,pad=480:270:-1:-1,setsar=1[rescaled8];
[rescaled0][10:a][9:v][10:a][rescaled1][10:a][9:v][10:a][rescaled2][10:a][9:v][10:a][rescaled3][10:a][9:v][10:a][rescaled4][10:a][9:v][10:a][rescaled5][5:a][9:v][10:a][rescaled6][6:a][9:v][10:a][rescaled7][7:a][9:v][10:a][rescaled8][8:a]concat=n=17:v=1:a=1[final_video][final_audio]


  


  I either have thousands of
[mp4 @ 000002132cefe100] Delay between the first packet and last packet in the muxing queue is 10007800 > 10000000: forcing output

  


  when I use

  


  -f lavfi -i anullsrc
so I tried using -f lavfi -i aevalsrc=0:n=1

  


  instead, I have have thousands of

  


  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)

  


  The encoding "stalls" at frame 127, it keeps doing things, but the frame counter doesn't increment.

  


  Here are the inputs :

  


  I skipped the yuvj420p input as it generated warnings (looks like it's not a big problem)

  


  

  


  Here is a log (I trimmed it a bit) : (I think it's a bit large for stackoverflow)

  


  https://bpa.st/HB7A

  


• ffmpeg conversion executable file output ".MOD : no files in such directory"

  11 octobre 2023, par Zezaps

  I installed ffmpeg using Homebrew in macOS 12.2. I have a folder of MOD files from an old camera that I need to convert to MOV or MP4 to edit them, I have a .bat file in my Windows machine that I can run on a folder that has MOD files to batch convert them to MP4 or MOV that I can easily tweak but I'm kinda clueless with how to do this on my new (and first) Mac, I came across this script that I managed to use once through the terminal but tried putting it in a executable file so I can easily run it and copy it in every folder that I need to for new projects. When I created the exec file I'm not sure if I did it correctly though.

  


  for i in *.MOD;
  do name=`echo "$i" | cut -d'.' -f1`
  echo "$name"
  ffmpeg -i "$i" "${name}.MOV"
done


  


  This script is inside an exec file that I edited using TextEdit, it works sometimes if I go to the directory through the terminal and run it but if I run it double clicking it I get a ".MOD : Not such file or directory" even though I placed the exec on a folder that has multiple .MOD files.

  


  Here is the full terminal output

  


  Last login: Sat Apr 23 20:00:38 on ttys001
/Users/anwar/Movies/FILMS/ANWAR/BLUE/old/batmodmp4 ; exit;
anwar@MacBook-Pro-de-Anwar ~ % /Users/anwar/Movies/FILMS/ANWAR/BLUE/old/batmodmp4 ; exit;
*
ffmpeg version 5.0 Copyright (c) 2000-2022 the FFmpeg developers
  built with Apple clang version 13.0.0 (clang-1300.0.29.30)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/5.0 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-neon
  libavutil      57. 17.100 / 57. 17.100
  libavcodec     59. 18.100 / 59. 18.100
  libavformat    59. 16.100 / 59. 16.100
  libavdevice    59.  4.100 / 59.  4.100
  libavfilter     8. 24.100 /  8. 24.100
  libswscale      6.  4.100 /  6.  4.100
  libswresample   4.  3.100 /  4.  3.100
  libpostproc    56.  3.100 / 56.  3.100
*.MOD: No such file or directory

Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.