Ticket #1787 (closed defect: invalid)
Losing Silent Audio When Converting From Nellymoser Produced By Flash Media Server Recording
|Reported by:||eric@…||Owned by:|
|Blocking:||Reproduced by developer:||yes|
|Analyzed by developer:||yes|
Summary of the bug:
I am trying to stitch together two videos that are recorded from a Flash Media Server.
Using AviSynth? and FFMpeg I'm able to accomplish this! ...But the audio doesn't
convert correctly. It's losing packets when converting the Nellymoser audio
to any other format. (Ex: Wav, Mp4, Mp3)
Example: I start with an .flv and convert the audio to .wav and the sound clip changes
from a duration of ~1:28 to a duration of ~0:35.
I have done some research and solved my issue by setting the microphone silence level on
the Adobe Flash object to 0, preventing null packets from being sent.
This was encoding the audio and including packets that did not contain enough data,
If there is any way to fix this issue that chops off the silent packets of a Nellymoser
encoded audio stream, you may want to consider adding it to the ffmpeg project.
How to reproduce:
ffmpeg -i "E:\Frameserver\outputaudio.flv" "E:\Frameserver\outputaudio.wav" ffmpeg version used: ffmpeg version N-44727-gbbe9fe4 Copyright (c) 2000-2012 the FFmpeg developers built on Sep 24 2012 16:51:07 with gcc 4.7.1 (GCC) configuration: --enable-gpl --enable-version3 --disable-pthreads --enable-runt ime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass - -enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-l ibfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenj peg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheo ra --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --ena ble-zlib
- Analyzed by developer set
- Resolution set to invalid
- Status changed from new to closed
- Component changed from undetermined to FFmpeg
- Reproduced by developer set
- Keywords nellymoser added; Nellymoser Audio Losing Duration Flash Media Server removed
- Component changed from FFmpeg to undetermined