来自png的ffmpeg ... PNGS子集出错? [英] ffmpeg from pngs... Error with subset of PNGS?

问题描述

我将要转换为电影的大约1200 png.其中有些缺失:即-_00003.png，_00005.png存在，但是1、2和4不存在.

I have about 1200 pngs that I'm converting into a movie. Some of them are missing: i.e. - _00003.png, _00005.png exist, but 1, 2, and 4 do not.

以下命令适用于其他数据集，但不适用于我当前的png组:

The following command works for other datasets, but not my current set of pngs:

ffmpeg -i pngs/_*.png -y -vcodec mpeg4 -pix_fmt yuv420p -r 25 -filter:v 'setpts=1.2*PTS' p3SN.mp4

我收到此错误:

Output #61, image2, to 'pngs/_00096.png':
  Metadata:
    encoder         : Lavf57.83.100
    Stream #61:0: Video: png, rgba, 3240x2160 [SAR 3937:3937 DAR 3:2], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
    Metadata:
      encoder         : Lavc57.107.100 png
Output #62, image2, to 'pngs/_00097.png':
  Metadata:
    encoder         : Lavf57.83.100
    Stream #62:0: Video: png, rgba, 3240x2160 [SAR 3937:3937 DAR 3:2], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
    Metadata:
      encoder         : Lavc57.107.100 png
[png @ 0x7fae93170e00] ff_frame_thread_encoder_init failed
Error initializing output stream 63:0 -- Error while opening encoder for output stream #63:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!

图像_00097.png中的

.如果我将其删除，则稍后会发生(105).

at image _00097.png. If I remove it, it just happens a little later (105).

我已经通过查看图像的尺寸等检查了图像，并且此范围内的所有图像看起来都一样(我使用_0009?.png进行了检查).

I've checked the images by looking at their dimensions, etc. and all of them in this range look the same (I checked all those with _0009?.png).

知道为什么会这样吗?

这是有问题的文件(中间)和之前/之后的文件:

Here's the offending file (middle) and the one before/after:

推荐答案

您的命令将使用第一个输入覆盖所有输入文件.这是为什么在使用 -y 时会格外小心的示例，它会自动覆盖文件而不会询问您.

Your command will overwrite all of the input files with the first input. This is an example of why to use caution when using -y which will automatically overwrite files without asking you.

您需要告诉 ffmpeg 使用全局模式:

ffmpeg -y -pattern_type glob -framerate 25/1.2 -i "pngs/_*.png" -vcodec mpeg4 -pix_fmt yuv420p -r 25 p3SN.mp4

• 我相信glob模式选项在Windows上不起作用，但是如果它等效于Linux cat 命令，则可以通过管道传递输出: cat * .png |ffmpeg -i-output.mp4
• 如果需要，可以使用 -framerate 和 -r 代替setpts.
• I believe the glob pattern option does not work on Windows, but if it has an equivalent to the Linux cat command you can pipe the output: cat *.png | ffmpeg -i - output.mp4
• You can use -framerate and -r instead of setpts if desired.

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