Opened 5 years ago
Closed 5 years ago
#8557 closed defect (needs_more_info)
ffmpeg sampling is different accross versions
| Reported by: | Hamid | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | undetermined |
| Version: | unspecified | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
Summary of the bug:
I suppose the following command should produce the same output different minor versions of ffmpeg 4. But in this case, I found the output is different for a given ogg file when moving from version 4.0.3 to 4.2.2
How to reproduce:
Run the following on a ogg opus file in 2 versions. The output is different:
ffmpeg -i input.ogg -ac 1 -ar 15000 -f s16le - 2>/dev/null
For mp3 files there is no difference. I suppose there was/is a bug in either of versions.
Attachments (1)
Change History (4)
by , 5 years ago
| Attachment: | hello 1.ogg added |
|---|
comment:1 by , 5 years ago
| Resolution: | → invalid |
|---|---|
| Status: | new → closed |
follow-up: 3 comment:2 by , 5 years ago
| Resolution: | invalid |
|---|---|
| Status: | closed → reopened |
Please run the command using 2 versions of ffmpeg. The input data is the same but output changes. Was this due to a bugfix or is it a new bug?
I don't know what is vague here!
The command just prints samples as 16bit signed integers in binary little endian format.
Same input should give same output.
comment:3 by , 5 years ago
| Resolution: | → needs_more_info |
|---|---|
| Status: | reopened → closed |
Replying to halaei:
Please run the command using 2 versions of ffmpeg. The input data is the same but output changes.
Why is this an issue?
Was this due to a bugfix or is it a new bug?
Please run git bisect and tell us!
I don't know what is vague here!
Mostly that you didn't tell us what you don't like about the current output.
The command just prints samples as 16bit signed integers in binary little endian format.
Same input should give same output.
This is not true in every case (think of multi-threaded encoding), and certainly not across different versions.
Too vague.