#1723: Stream selection doesn't check the existence of the stream
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Reporter: burek | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Summary of the bug:
When the stream selection is used in such a way that it selects a non-
existing stream, ffmpeg doesn't show any warnings or errors, but rather
chooses to ignore the issue completely.
For example, if our input contains 2 video streams and we try to select a
non-existent video stream like "-c:v:333" it will not complain, but IMHO
it should, because if a user has specified a command line option for
something, it means he wants that option to be taken into account. The
least ffmpeg could do is issue a warning saying it is a non-existent
stream selected.
How to reproduce:
{{{
% ffmpeg -i input -c:v:333 copy output
}}}
Instead of getting an error, warning or something like this:
{{{
Stream mapping:
Stream #0:0 -> #0:0 (copy)
}}}
the result is the same as if "-c:v:333 copy" was deleted from cmd line,
thus ignored totally, using some default encoder like this:
{{{
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> libx264)
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1723>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker
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