Great video but no audio on .mp4 files
The video is great but there is absolutely no sound in the .mp4 files I'm downloading. I'm running Xubuntu 16.04LTS and have played them in VLC, Parole, and Videos. All have perfect video but no audio. I've checked that the sound is at 100% and that the mute button isn't clicked.
Any ideas? Thanks. |
How are you downloading them? Can you give an example mp4 on the net that you're having problems with?
Are you getting sound out of your machine otherwise? |
Got handbrake ? you could try re-sampling one of them and change the audio defaults add one and change its out put to a different encoder.
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i will venture a guess that they have sound, but it doesn't playback.
do you have sound at all? how are the videos encoded? open them with mplayer or mpv, and post the terminal output. btw, you've been here long enough to know that you should have provided more info in your OP. |
Default sound chip setting probably. In VLC settings. Or Pulse Audio. Google should take it from there.
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https://08-lvl3-pdl.vimeocdn.com/01/...18187fe692276e And sound works fine on all other files (Youtube, browser-stuff, .wmv files, .mp3 files etc). Btw Installed the 'unrestricted extras' too. That made no difference. |
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I don't know how they are encoded. I tried to track that down and got as far as the screenshot, then didn't know which to download. I don't know how to open them with mplayer or mpv. I checked in the terminal and neither program is installed, but I wouldn't know how to open them there anyway. Yep, will provide more info. next time. |
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And I checked the audio settings in VLC. Some of the .mp4s have 'stereo/left/right/reverse stereo' settings but changing them makes no difference. And I don't know what a 'chip setting' is or where to look for it. (Couldn't find anything for 'chip setting' in Google.) |
Use avprobe or ffprobe to verify that the video has audio.
$ avprobe file.mp4 $ ffprobe file.mp4 I had an issue like this recently, I needed something for mp3 audio to be installed. mpg321, libmpg123-0, it's been a while. |
Hey Gregg_Bell ... I believe you need the proper AAC codec which is part of the gst-plugins-bad package. Could you check if that is installed on your system ? In many distros it is not by default.
Cheers, |
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not in the browser, and not when playing it with mpv. and i NEVER have problems witht mp4s. mediainfo says there is an audio track, and it's it's AAC encoded. My system is definitely capable of playing that. therefore i surmise that this video has an audio track which is SILENT. |
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I think that may be how they are supposed to be, being stock video clips. |
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Code:
gregory@gregory-OptiPlex-GX520:~/Desktop$ avprobe file.mp4 |
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