VLC media player problem - no audio

I would greatly appreciate any suggestions for a problem playing MP4 video with VLC media player--when I play MP4 video using VLC, the video is normal but the audio is missing. I searched the VLC FAQ and forums, but could not find the answer. Until a few minutes ago, my VLC player seemed to play my MP4 videos normally with intact audio and video. Using the control panel, I changed the default player of my MP4 files from DIVX to VLC. After this change, the video component of my MP4 files appears normal in VLC player, but the audio is silent. I looked through the VLC controls but to no avail. When I play the same MP4 video with DIVX player, both audio and video are present and normal. I then played a .avi video with the VLC player and both audio and video are normal. I suspect there is a simple solution, but I simply do not know what it is.

Thanks much for reading and any responses.

 

Hard to say what to do as VLC player only uses it's own components. It will generally not use any other codecs such as those installed by DivX Player.

Perhaps try a reset of VLC settings.

 

Thanks for your suggestion. I did some further testing and discovered the VLC player does not play the audio of MKV files in addition to MP4 files, although the video component of both file types is normal. The confusing aspect is I recall VLC playing MP4 files with both audio and video intact previously. As you suggested, I'll try resetting the VLC parameters to default and see if this corrects the problem.

Thanks again.

 

Also check the Windows Volume Mixer to see if some setting could have changed there.

 

Namaiki, your suggestion was spot-on. I clicked the reset function under "preferences" in the VLC player and afterwards my VLC plays both MP4 and MKV files with both normal audio and video. In retrospect, I should have done this at the beginning before posting, but...live and learn. Obviously the VLC parameters were corrupted somehow.

As I am writing this, I am playing a MP4 video via VLC player and just discovered an unusual idiosyncrasy. When I moved the position indicator to fast-forward the video ahead a few minutes, the audio cut out and did not return. However, when I opened another MP4 video or re-opened the same MP4 video, the audio played normally again. I was able to repeat this pattern 3 times by moving the position indicator backwards (rewind) and forwards (fast-forward), followed by audio silence, then restored the audio by re-opening the file in VLC. I surmise this caused the audio and video tracks to go out of synch with each other, and perhaps accounts for the earlier problem of no audio in that I unwittingly caused audio-video asynchrony. I'll attribute this to a "ghost in the machine" phenomenon, but if anyone has a more rational explanation, I'd greatly appreciate your posting and sharing it.

 

The MP4 file could be broken or incomplete. Does the same happen with other MP4 files? (from other sources) You could try mux it into MKV if despar

 

After viewing several MP4 files with both VLC and DIVX media players, I suspect you're correct that the problem was some incomplete and/or corrupted MP4 files and not the VLC media player. The VLC player has no problems with most MP4 files, and the ones whose audio cut out on VLC also showed some playback hesitation on DIVX player. Thanks for your advice.

 

I have used VLC player for years, but for the last few weeks i have been using KMPlayer and i think it is great.

KMPlayer - Download