Por que recebo esse erro e como corrigi-lo?
[jalal@goku imageSequence]$ ffmpeg -i video_0.avi -qscale:v 1 keyframes/vid0/img_%%06d.jpg
ffmpeg version 2.6.8 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-gnutls --enable-ladspa --enable-libass --enable-libcdio --enable-libdc1394 --enable-libfaac --enable-nonfree --enable-libfdk-aac --enable-nonfree --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libx264 --enable-libx265 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, avi, from 'video_0.avi':
Metadata:
encoder : Lavf57.42.100
Duration: 00:04:16.64, start: 0.000000, bitrate: 1818 kb/s
Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuvj420p(pc), 2048x2048 [SAR 1:1 DAR 1:1], 1813 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Output #0, image2, to 'keyframes/vid0/img_%%06d.jpg':
Metadata:
encoder : Lavf56.25.101
Stream #0:0: Video: mjpeg, yuvj420p(pc), 2048x2048 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
Metadata:
encoder : Lavc56.26.100 mjpeg
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[image2 @ 0x1668720] Could not get frame filename number 2 from pattern 'keyframes/vid0/img_%%06d.jpg' (either set updatefirst or use a pattern like %03d within the filename pattern)
av_interleaved_write_frame(): Invalid argument
frame= 13 fps=0.0 q=0.0 Lsize=N/A time=00:00:00.16 bitrate=N/A
video:563kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Conversion failed!
[jalal@goku imageSequence]$
A linha de comando correta para seus objetivos deve ser:
ffmpeg -i video_0.avi -qscale:v 1 keyframes/vid0/img_%06d.jpg
Isso deve criar com sucesso suas imagens com 6 dígitos nos nomes dos arquivos de saída.
O erro em sua linha de comando é o '%' extra na seção do nome do arquivo de saída: img_%%06d.jpg .
Referências: