Ticket #1723 (new defect)
Opened 9 months ago
Stream selection doesn't check the existence of the stream
|Reported by:||burek||Owned by:|
|Blocking:||Reproduced by developer:||no|
|Analyzed by developer:||no|
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)