使用 avconv 或 ffmpeg 從 png 製作電影時出錯

我想使用以下命令從一堆 png 中創建電影：

avconv -i pics/*.png  out.mp4

或者

ffmpeg -r 1/1 -start_number 1 -i pics/*.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4

但是，在這兩種情況下，我都得到：

Error while opening encoder for output stream #18:0 - maybe incorrect parameters such as bit_rate, rate, width or height

第二個命令的完整日誌消息是：

ffmpeg version 1.0.10 Copyright (c) 2000-2014 the FFmpeg developers
built on Jul 25 2014 07:50:40 with gcc 4.7 (Debian 4.7.2-5)
configuration: --prefix=/usr --extra-cflags='-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security ' --extra-ldflags='Wl,-z,relro' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --enable-nonfree --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-libvpx --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-librtmp --enable-avfilter --enable-libfreetype --enable-libvo-aacenc --disable-decoder=amrnb --enable-libvo-amrwbenc --enable-libaacplus --libdir=/usr/lib/x86_64-linux-gnu --disable-vda --enable-libbluray --enable-libcdio --enable-gnutls --enable-frei0r --enable-openssl --enable-libass --enable-libopus --enable-fontconfig --enable-libfdk-aac --enable-libdc1394 --disable-altivec --dis  libavutil      51. 73.101 / 51. 73.101
libavcodec     54. 59.100 / 54. 59.100
libavformat    54. 29.104 / 54. 29.104
libavdevice    54.  2.101 / 54.  2.101
libavfilter     3. 17.100 /  3. 17.100
libswscale      2.  1.101 /  2.  1.101
libswresample   0. 15.100 /  0. 15.100
libpostproc    52.  0.100 / 52.  0.100
Input #0, image2, from 'pics/1.png':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, rgba, 594x557, 25 tbr, 25 tbn, 25 tbc
File 'output.mp4' already exists. Overwrite ? [y/N] y
height not divisible by 2 (594x557)
Output #0, image2, to 'pics/10.png':
   Stream #0:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #1, image2, to 'pics/11.png':
   Stream #1:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #2, image2, to 'pics/12.png':
   Stream #2:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #3, image2, to 'pics/13.png':
   Stream #3:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #4, image2, to 'pics/14.png':
   Stream #4:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #5, image2, to 'pics/15.png':
   Stream #5:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #6, image2, to 'pics/16.png':
   Stream #6:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #7, image2, to 'pics/17.png':
   Stream #7:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #8, image2, to 'pics/18.png':
   Stream #8:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #9, image2, to 'pics/19.png':
   Stream #9:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #10, image2, to 'pics/2.png':
   Stream #10:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #11, image2, to 'pics/3.png':
   Stream #11:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #12, image2, to 'pics/4.png':
   Stream #12:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #13, image2, to 'pics/5.png':
   Stream #13:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #14, image2, to 'pics/6.png':
   Stream #14:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #15, image2, to 'pics/7.png':
   Stream #15:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #16, image2, to 'pics/8.png':
   Stream #16:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #17, image2, to 'pics/9.png':
   Stream #17:0: Video: png, rgba, 594x557, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Output #18, mp4, to 'output.mp4':
   Stream #18:0: Video: h264, yuv420p, 594x557, q=-1--1, 90k tbn, 30 tbc
Stream mapping:
 Stream #0:0 -> #0:0 (png -> png)
 Stream #0:0 -> #1:0 (png -> png)
 Stream #0:0 -> #2:0 (png -> png)
 Stream #0:0 -> #3:0 (png -> png)
 Stream #0:0 -> #4:0 (png -> png)
 Stream #0:0 -> #5:0 (png -> png)
 Stream #0:0 -> #6:0 (png -> png)
 Stream #0:0 -> #7:0 (png -> png)
 Stream #0:0 -> #8:0 (png -> png)
 Stream #0:0 -> #9:0 (png -> png)
 Stream #0:0 -> #10:0 (png -> png)
 Stream #0:0 -> #11:0 (png -> png)
 Stream #0:0 -> #12:0 (png -> png)
 Stream #0:0 -> #13:0 (png -> png)
 Stream #0:0 -> #14:0 (png -> png)
 Stream #0:0 -> #15:0 (png -> png)
 Stream #0:0 -> #16:0 (png -> png)
 Stream #0:0 -> #17:0 (png -> png)
 Stream #0:0 -> #18:0 (png -> libx264)
Error while opening encoder for output stream #18:0 - maybe incorrect      parameters such as bit_rate, rate, width or height

我怎樣才能使這項工作？

我認為帶有星號的文本需要連續數字指示符 %d ：

avconv -i 'pics/%d.png'  out.mp4
ffmpeg -r 1/1 -start_number 1 -i 'pics/%d.png' -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4

引用 avconv 手冊頁：

  The pattern may contain the string "%d" or "%0Nd", which specifies the position of the characters representing a
  sequential number in each filename matched by the pattern. If the form "%d0Nd" is used, the string representing
  the number in each filename is 0-padded and N is the total number of 0-padded digits representing the number.
  The literal character '%' can be specified in the pattern with the string "%%".

  If the pattern contains "%d" or "%0Nd", the first filename of the file list specified by the pattern must
  contain a number inclusively contained between 0 and 4, all the following numbers must be sequential. This
  limitation may be hopefully fixed.

  The pattern may contain a suffix which is used to automatically determine the format of the images contained in
  the files.

  For example the pattern "img-%03d.bmp" will match a sequence of filenames of the form img-001.bmp, img-002.bmp,
  ..., img-010.bmp, etc.; the pattern "i%%m%%g-%d.jpg" will match a sequence of filenames of the form i%m%g-1.jpg,
  i%m%g-2.jpg, ..., i%m%g-10.jpg, etc.

  The size, the pixel format, and the format of each image must be the same for all the files in the sequence.

  The following example shows how to use avconv for creating a video from the images in the file sequence
  img-001.jpeg, img-002.jpeg, ..., assuming an input framerate of 10 frames per second:

          avconv -i 'img-%03d.jpeg' -r 10 out.mkv

引用自：https://unix.stackexchange.com/questions/187700