[BUG] Passthrough audio changes sample rate on multiple audio streams

[potejan]

Out of curiousity: Who does that and why?

Type-1 and Type-2 AVI dates to the times when computers were severely underpowered. Here is a very good explanation by Microsoft themselves:

DV cameras produce interleaved audio-video; each frame of video also contains the audio information. If you save DV data to an AVI file, you have a choice:

- Store the interleaved data as one stream in the AVI file. This is known as a type-1 file.
- Split the interleaved data into separate audio and video streams. This is known as a type-2 file.

For video capture, where maximum throughput is crucial, it is better to use a type-1 file, because type-2 files carry redundant audio data. (The video stream still has the audio data. The audio is simply hidden by labeling the stream as video.) Also, writing a type-2 file requires some additional processor time to split the interleaved stream.

On the other hand, type-1 files are less efficient for real-time editing. The application must extract the audio from the interleaved stream, make the edits, and interleave the data again. Also, the type-1 format is not compatible with Microsoft® Video for Windows® (VFW). DirectShow can handle both types of files.

Source: https://docs.microsoft.com/en-us/windows...-avi-files

If you can share a small sample of such a source I can try to reproduce and fix the sample rate issue.

A sample incoming to your PMs!

Thanks