Mp4 download only have sound

Support & Help Requests
1

I have a major problem downloading mp4s.

The download ONLY plays the audio.

How can I fix that?

2

To make sure it's not the MP4 itself, try one of the samples here first: https://sample-videos.com/

The 1mb 1280x720 displays video and audio on my UM 24.04.1 machine when opened in Celluloid.

3

I use VLC.

I feel it is not the video.

If I download different resolutions, I eventually find one that plays both sound and video.

4

All the MP4 samples work in VLC for me.

Note: not all of the files on that website were MP4 - did you try only the MP4 files, and some worked while others did not?

5

Most played video and audio.

But many only played ONLY audio.

6

Sounds like you might have some missing CODECs, but I am not sure which ones.

Use the mediainfo report to identify the video format, then let the community know that result. The experts will be able to tell you which package to install the missing CODECs. :slight_smile:

7

This might help Andy:

2 Likes
8

https://forums.linuxmint.com/viewtopic.php?t=391549

The symptoms described (audio but no video) are the same as the issue I had: [viewtopic.php?t=391549]

(SOLVED: GStreamer plays only audio for MP4 videos on Mint 21.1 - Linux Mint Forums). It was caused by a problem with the accelerated video codec in GStreamer, and can be worked around by an environment variable.
As stated above, VLC has its own codecs, so doesn't suffer from the problem.

Top

It seems not to be missing codecs.
Maybe you can figure out what this means eric, it is way beyond me.

GStreamer selects codecs based on capability and priority. The priority of a codec (0 - 255?) can be manipulated via the GST_PLUGIN_FEATURE_RANK environment variable. By launching my app from a shell script that set the variable, I was able to work around the problem:

Code: Select all

GST_PLUGIN_FEATURE_RANK="vaapidecodebin:0" python3 ...

I hope this write-up helps someone else grappling with the issue...

9

I posted this in the wrong place. Maybe a moderator could move it to:

Mp4 download only have sound
Support & Help Requests Nov 7 fixit7

10

Hi, @jymm :slight_smile:

Done! I've just moved your "Mp4 download only have sound - #8 by jymm" reply from the "Alternate way to transfer files to my hard drive" topic to this "Mp4 download only have sound" topic where we are now, per your request :slight_smile:

3 Likes