Problem :
I have made my Adobe Connect recording offline and when I attempt to play the FLV, the audio doesn’t get recognized by my audio player.
The audio in this file is not recognized even with most standard FLV players. If I attempt to convert it to any other format like MP4, MOV etc, the converted file doesn’t have any audio in that case.
Environment :
Adobe Connect 7.x,8.x,9.x Hosted/Licensed
Reason :
You might sometimes end up creating such an FLV file by making Connect Recording Offline. You are likely to run into this issue if you happen to resize the Adobe Connect add-in window while your recording is being made offline.
Audio tracks in the offline recording FLV might become unrecognizable partially or completely at varying timestamps within the FLV, in any normal player. The offline FLV might also fail to play correctly sometimes on some standard players like VLC.
Our research indicated that this can be caused to happen because of resizing the Connect add-in window during the process while a recording is being made offline.
To avoid running into this problem of generating a corrupt FLV as a result of your offline recording process, you should ensure you only resize the connect add-in window prior to starting the offline making process. You can set the add-in window size to whatever size/resolution suits your requirement, however you should only do this before the offline making process starts. You can do this before hitting the button of “Proceed with offline recording” that shows up as a prompt in the below screenshot :
Offline Recording Prompt
Note that you certainly can minimize and restore the Connect add-in window while making a recording offline, however you should always avoid doing so. The reason behind this is the fact, that the size of the Connect add-in window, while making recording offline, determines the video resolution of the offline FLV being created.
Resizing it during the process, causes inconsistency of video resolution in the FLV file. And this inconsistency, sometimes results in an unrecognizable audio track in the FLV file (especially if this inconsistency is there before any audible audio in the recording).
You may also find such audio inconsistencies if you decide to edit/split the output FLV file into parts.
Comments
Hi, I have issues as described above but have not resized or minimized the screen. It appears that the .FLV file which has been generated does not contain an audio stream, or at least the stream cannot be read by the VLC player or by using Quicktime with the Perian plugin.
The audio works just fine when viewing the recording within the web browser. Any ideas as to what could be causing this issue?
Hi David, Do you wanna send over the recording details? I can take a look.
I have found that even when you do not resize the window while making an offline recording the audio is still problematic when attempting to transcode the .flv file.
Audio will often be lost completely or end up running ahead of the video when transcoded. I have found this when transcoding to a variety of formats (ProRes422, MPEG4, H264) with both Adobe Media Encoder, Apple Quicktime and Apple Compressor.
I suspect the culprit is the Nellymoser audio codec in one way or another.
Hi Krystian,
Mentioned above in this post is one way that often produces this problem. It is possible that there are other things too that leads to this issue. Do you frequently encounter this issue in your recordings ? We have improved the offline making functionality of recording in Connect 9 which is expected to reduce such issues.
I have exactly this problem, i did not resize my window at all, still the FLV plays ok in Flash but converting it to another format with the Adobe Media Encoder shows already that the FLV has no Audio. How can this be fixed, i actual would need to Audio only out of my files. Even if i import it to Adobe Premier it can also not detect the Audio.
Who can help here please ?
thank you
Dieter
I’ve been basically unable to export recordings of webinars with working audio tracks since I started working with Adobe Connect over the summer of 2012. Similar to Krystian, I have never re-sized the interface window before or during an Adobe Connect recording capture session, and always end up with FLV-format videos with unrecognizable audio tracks. It’s putting a huge strain on my workflow.