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Questions tagged [webm]

WebM is an audio-video format designed to provide a royalty-free, open video compression format for use with HTML5 video. The project's development is sponsored by Google.

34 questions
72
votes
3 answers

Convert WebM to other formats

I take photos and videos using Cheese on Ubuntu 12.04. They are in WebM formats. How to convert them in other more conventional formats for making them compatible with other OS and devices (Windows, Mobiles etc)? I am looking for an easy tool since…
kamyogi
  • 1,498
66
votes
3 answers

How to do I convert an webm (video) to a (animated) gif on the command line?

I suppose ffmpeg is the weapon of choice but I didn't find out how to reach my goal.
brubaker
  • 819
26
votes
5 answers

How to play a webm video file?

I have tried vlc, Banshee and Totem but none of them recognize the webm format. Even the system does not recognize its mime-type. How do I play it ?
Lincity
  • 25,749
24
votes
3 answers

How to fast convert mp4 to webm using ffmpeg?

I have to convert 76 mp4 files to webm for the purpose of a website that uses HTML5 videos. I'm talking about 10 Gb of mp4 files... I know I can simply ask ffmpeg to do that using: ffmpeg -i input_file.mp4 output_file.webm Of course I'll do it…
pr.nizar
  • 790
14
votes
7 answers

How to make WebM desktop recordings?

I am looking for either a desktop recorder/screencast application that can output in WebM format, or a program that can convert the .ogv format generated by gtk-recordmydesktop into WebM. I have selected WebM as the format I need because it seems to…
Knowledge Cube
  • 14,911
12
votes
3 answers

Are there any video editors that support WebM?

Are there any video editors for Ubuntu that support WebM importing? AKA, I have a raw WebM file that needs editing.
jrg
  • 61,707
9
votes
4 answers

Converting WEBM to MP3

I'm aware there are a couple of other questions here related to this, but the answers provided don't seem to work. I'm trying to convert a webm to mp3 with avconv. Here's how I tried to do it: $ ls test.webm $ avconv -acodec libmp3lame -i…
Juicy
  • 935
8
votes
1 answer

Why isn't WebM video supported out of the box?

Ubuntu can't include non-free codecs, but has had the ability to play Ogg Theora and Vorbis files out-of-the-box for years because they're open source. Now that WebM is such a popular, free alternative to H.264, why isn't support included by…
Nathan Dyer
  • 2,117
8
votes
3 answers

How can I convert my webm screencast to mp4?

Gnome has a built-in screencast tool using ctrl plus shift plus alt plus R. It's a great tool with consistent quality video output! But, I need the output in mp4. I have tried this: ffmpeg -i screencast.webm -crf 0 screencast.mp4 as specified in…
Costa Michailidis
  • 5,190
8
votes
1 answer

How can I convert an animated WebP to a WebM?

I would like to convert an animated WebP file to a WebM. However, most tools only support converting to an animated WebP but not back, when they support animated WebPs at all: ImageMagick's convert does not support animated WebP, ffmpeg does not…
James Martin
  • 291
6
votes
2 answers

What application can edit WebM metadata?

I have a few hundred WebM files, which include audio and video in one file (WebM is a container format). I want to edit their metadata, like: artist who performs the song title of the song album year of publication I've seen exiftool, but…
Smile4ever
  • 1,091
5
votes
1 answer

Best avconv settings for WebM video?

What are the best settings when converting, say, a .mp4 video to WebM? I have done some searching on here but nothing specific to what I need really. What I've been using: avconv -i input.mp4 \ -c:v libvpx -qmin 10 -qmax 42 -maxrate 500k…
NPIC
  • 119
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  • 7
5
votes
2 answers

Edit webm video (with GUI)

I recorded a screencast with kazam. Now I have a webm file. Which tool can I use to edit this video? I want to cut (remove) some parts. I use Ubuntu 18.04
guettli
  • 1,765
4
votes
1 answer

How to extract audio from Webm without transcoding?

Audio within mp4 and flv files is AAC, and a proper container for that is m4a. So, in order to extract sound from mp4 and flv I use a command like gnome-terminal -e "parallel avconv -i '{}' -map 0:1 -c:a copy '{}.m4a' ::: %F" and add it to…
user47206
3
votes
1 answer

How to compress videos properly with WebM?

Years ago when the VP8 codec came out, I used a program on Ubuntu to convert all of my files to WebM and it would cut the filesize in half. 22-minute episodes going from 300MB to under 150MB. I think it may have been Miro Video Converter, but they…
ovine
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