0002974: Choppy Audio and Artifacts with Rescale

View Issue Details [ Jump to Notes ]

[ Issue History ] [ Print ]

Project

Category

View Status

Date Submitted

Last Update

0002974

Kdenlive

Rendering

public

2013-02-03 04:58

Reporter

klaxian

Assigned To

Priority

normal

Severity

major

Reproducibility

always

Status

new

Resolution

open

Platform

64 bit

Ubuntu

OS Version

12.10

Product Version

0.9.4

Target Version

Fixed in Version

Summary

0002974: Choppy Audio and Artifacts with Rescale

Description

When scaling a video during rendering and using low bitrate audio (ie. 64kpbs), the audio in the rendered file stutters badly and is choppy. This occurs with both vorbis and AAC. It was tested with multiple players including VLC, Totem, and Mplayer. I extracted the audio from the resulting file and confirmed the problem with Audacious as well. Rescale is not usable like this. Upon increasing the bitrate (ie. 128kbps), the audio is smoother but there are many noticeable artifacts like pops and clicks. This does not happen when rescale is not used.

Steps To Reproduce

Render a video with audio bitrate at 64kbps and scale down to a lower resolution.

Additional Information

Profile: f=matroska acodec=aac ab=%audiobitrate+'k' pix_fmt=yuv420p vcodec=libx264 crf=30 preset=slower tune=film subq=10 bf=5 refs=6 aspect=%dar

Issue History
Date Modified	Username	Field	Change
2013-02-03 04:58	klaxian	New Issue

Relationships

Notes
There are no notes attached to this issue.