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• 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 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.

  


• lavfi/dnn : Remove DNN native backend

  27 avril 2023, par Ting Fu

  lavfi/dnn : Remove DNN native backend
  According to discussion in
  
  https://etherpad.mit.edu/p/FF_dev_meeting_20221202 and the proposal in
  
  http://ffmpeg.org/pipermail/ffmpeg-devel/2022-December/304534.html,
  
  the DNN native backend should be removed at first step.
  
  All the DNN native backend related codes are deleted.
  Signed-off-by : Ting Fu <ting.fu@intel.com>
  

  • [DH] libavfilter/Makefile
  • [DH] libavfilter/dnn/Makefile
  • [DH] libavfilter/dnn/dnn_backend_native.c
  • [DH] libavfilter/dnn/dnn_backend_native.h
  • [DH] libavfilter/dnn/dnn_backend_native_layer_avgpool.c
  • [DH] libavfilter/dnn/dnn_backend_native_layer_avgpool.h
  • [DH] libavfilter/dnn/dnn_backend_native_layer_conv2d.c
  • [DH] libavfilter/dnn/dnn_backend_native_layer_conv2d.h
  • [DH] libavfilter/dnn/dnn_backend_native_layer_dense.c
  • [DH] libavfilter/dnn/dnn_backend_native_layer_dense.h
  • [DH] libavfilter/dnn/dnn_backend_native_layer_depth2space.c
  • [DH] libavfilter/dnn/dnn_backend_native_layer_depth2space.h
  • [DH] libavfilter/dnn/dnn_backend_native_layer_mathbinary.c
  • [DH] libavfilter/dnn/dnn_backend_native_layer_mathbinary.h
  • [DH] libavfilter/dnn/dnn_backend_native_layer_mathunary.c
  • [DH] libavfilter/dnn/dnn_backend_native_layer_mathunary.h
  • [DH] libavfilter/dnn/dnn_backend_native_layer_maximum.c
  • [DH] libavfilter/dnn/dnn_backend_native_layer_maximum.h
  • [DH] libavfilter/dnn/dnn_backend_native_layer_pad.c
  • [DH] libavfilter/dnn/dnn_backend_native_layer_pad.h
  • [DH] libavfilter/dnn/dnn_backend_native_layers.c
  • [DH] libavfilter/dnn/dnn_backend_native_layers.h
  • [DH] libavfilter/dnn/dnn_backend_tf.c
  • [DH] libavfilter/dnn_interface.h
  • [DH] libavfilter/tests/dnn-layer-avgpool.c
  • [DH] libavfilter/tests/dnn-layer-conv2d.c
  • [DH] libavfilter/tests/dnn-layer-dense.c
  • [DH] libavfilter/tests/dnn-layer-depth2space.c
  • [DH] libavfilter/tests/dnn-layer-mathbinary.c
  • [DH] libavfilter/tests/dnn-layer-mathunary.c
  • [DH] libavfilter/tests/dnn-layer-maximum.c
  • [DH] libavfilter/tests/dnn-layer-pad.c
  • [DH] libavfilter/vf_derain.c
  • [DH] libavfilter/vf_dnn_processing.c
  • [DH] libavfilter/vf_sr.c
  • [DH] tests/Makefile
  • [DH] tests/fate/dnn.mak