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Questions tagged [webm]

WebM is an open video encoding standard by Google. It consists of video streams compressed with the VP8 or VP9 video codec, audio streams compressed with the Vorbis or Opus audio codecs, and WebVTT text tracks. It may contain alpha planes for transparency.

For the purposes of the video tag introduced by HTML5, there was a need for an open (royalty-free) video codec which could be incorporated into free open source projects. WebM is Google's answer to this challange. An other possibility is Theora (also royalty-free).

Other vendors are voting for H.264 (mostly Apple and Microsoft), for which they already bought the licenses to incorporate into their web browsers.

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FFmpeg pipe input, error while transcoding from WebM to MP4

I am trying to record a video from pipe input using FFMPEG. The pipe input is in WebM format i.e. the video codec is VP8 and the audio codec is OPUS. I am able to save the output video in the WebM format using FFMPEG without any issue. But when I am…
saurav
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module 'moviepy' has no attribute 'VideoFileClip'

I want covert .webm file to .wav file. but I getting module ['moviepy' has no attribute 'VideoFileClip'].I have read the docs for MoviePy but cannot find out why this is happening. My Python program runs perfectly from within the IDE (PyCharm) but…
RED ALPHA97
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How to convert two png to transparent webm video with FFMPEG and Xfade

I have two transparent pictures, one is in completely transparent png format, its name is C0.png, the other is the main picture, and its name is C1.png. I want to superimpose two pictures with xfade and transparency effects. I used the command…
Xiang Chen
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FFmpeg: Concatenate .webm files some are video only some audio only some with both

In my case I have 3 .webm files the first one is audio only, the second one is video only, the third one is audio and video. I want to concatenate them into a single file which shows black screen for audio only parts, video for video only parts, and…
Salar Khan
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How to display Picture in picture for video files in .webm format, using NodeJS

Can someone please guide me How I could display one video file inside of another (Picture in picture), I have both the videos in .webm format. Any pointers/ guidance is greatly appreciated.
kurrodu
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How to convert wmv to webm in c#

I need to convert wmv to webm in my project. Maybe before upload maybe after upload i have no idea. Do you know any library or example code to doing that. I think it is not enough to change extension wmv to webm ?
Er.Er
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My script works but when i open the downloaded webm i get an error "the file cant be played because its damaged"

i have made a script to download the youtube webm file of the url you copied in the application. then it will download but when i open it it says the file cant be played because its damaged. How do i fix this?
Rene
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Is there any way to play webm video files in react native?

Can't seem to find any way to play webm videos in react native aside from using webview... Has anyone found a way to do it?
scottc5
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converting mkv to webm without pixel errors

I edited a video using a mask to have the middle part of the video playing and the other stuff colored in magenta. Later on I want to use a shader in Godot to key out all magenta pixels. Unfortunately Godot only supports webm files. I edited my…
Rail Wanderer
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Problem with downloading .mp3/webm format music/videos from youtube using python youtube_dl

So, it's not my code I found it on youtube tutorial(which I can't find now). from __future__ import unicode_literals import youtube_dl import os from sys import argv # Download data and config download_options = { 'format': 'bestaudio/best', …
nGvalia
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HTML video element in Microsoft Edge - Green frame issue

I am working on a scroll-based video system that works great in other browsers, but in edge, there are weird green frames in between the normal frames. I do not think this is to do with the scroll-based system, but more to do with the video file…
Benjamin Sommer
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Is it worth using HLS/DASH for web videos, or should I stick with webm/mp4

I am working on a system that will need to host large videos (~1 hour long). So I am considering 2 solutions: Convert the uploaded video to few webm files with different resolutions (4k, 1080p, 720p, ...) and a single mp4 as fallback and serve them…
HubertNNN
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Most time effective web format for converting h.265

So, I configured my ipcams to send event videos to a FTP server that saves it locally, and run a script that convert every video into something that can be opened in a generic browser, then send it to a S3 (I am using pyftpdlib + my…
IamRichter
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Are there any technical reasons that MP4 is more popular than Webm?

Not looking for opinions. I'm searching for data. As it is now, I want to become a webM evangelist. However, I assume there are some actual technical reasons why mp4 is preferred over webm in the bigger picture. I want to know them so I can be…
Dani
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WebM stream with subtitle in HTML5

I have stream with WebM. My stream have 3 clusters - video, audio, subtitles (build in). How can i embed subtitles in HTML without Media players (like VLC) pretty well using subtitle cluster but on web in HTML it not working (remind, i dont…
J. Doe
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