The VideoLAN Forums

Hi there. I'm new to the forums, and I'd like to let you know about a problem with the ogv container that I found (It happens on Windows and ARM Linux).

After convering any video to ogv (theora + vorbis) using ffmpeg2theora, ogvCovert or ffmpeg ( tested with the three of them). If I play the resulting video it feels like is playing at 15fps (in both OSes despite being 25fps). This choppiness not only affects VLC but also SMPlayer and the Chromium web browser (Firefox plays it smoothly).

The issue doesn't end here. If you use ffmpeg to change the container from ogv to mkv (not reencoding the video, just copying both audio and video to a mkv container) the video plays fine. So it has something to do with the OGV container.

I'd appreciate if someone could tell me if there is a way to fix this. Thanks.

Please open Tools -> Messages (set Verbosity to 2) before you start the playback, and then paste the full resulting log here or on Pastebin.com if it's too long.

Also upload a short sample of your original problematic file to Zippyshare.com or to WeTransfer.com and then post the link to the file here.
https://www.zippyshare.com
https://wetransfer.com

If needed cut it with DGsplit and read here about how to do it:
https://forum.videolan.org/viewtopic.ph ... 35#p193335
200 MB max should be enough.

When pressing the play button the following message appears: "main error: buffer deadlock prevented".
When stopped it adds "direct3d11 error: SetThumbNailClip failed: 0x800706f4".

I have uploaded the files to a Mega folder.

For copyright issues I chose to upload Blender Studio's Spring.

Spring.mp4 -> The original file downloaded from YouTube <plays fine>.

Spring.ogv -> The converted file (ffmpeg2theora -v 9 -x 640 -y 280 -F 24 -o ".\Spring.ogv" --resize-method lanczos -c 2 --nosubtitles --title "Spring" ".\Spring.mp4") <It has the issue>.

Spring.mkv -> Spring.ogv moved to a mkv container (ffmpeg -i "C:\Users\...\ffmpeg2theora\Spring.ogv" -vcodec copy -acodec copy "C:\Users\...\ffmpeg2theora\Spring.mkv") <The issue is gone, plays fine again>.

Thanks for replying.

Forgot the link:

https://mega.nz/folder/dlBgAaoT#FTFUmnVOeCU66TsLM1OC8A

Yes, I can reproduce the issue with VLC for Windows, the OGV file is very jerky while it's playing fine with other players.

You should create a new ticket on the VLC Trac with your above report, the link to your sample file and the link to this thread:
https://code.videolan.org/videolan/vlc/-/issues

But please, as requested post your FULL log, from the very beginning to the very end. It's important.