10mo ago

[Bug] Does anyone else have problems with .mp4 videos?

Boost fails to open .mp4 for me. When I browse "All" there usually is some mp4 content, especially from ... well ... nsfw instances. Theese almost always fail and I see just black screen. Firefox on mobile opens it without a problem and so does Sync For Lemmy. Do you have this issue or is it just me? F.e. can you open this link?

NSFW:

https://lemmynsfw.com/post/11686872

I see this:

I don't know if this is caused by instance or by Boost but as I said, Sync doesn't have this problem. And I like Boost more

6 comments

Same thing, even if I hit the HD button in the top right. If I tap the link button in the toolbar it opens in the webview just fine.

Boost has a lot of these bugs with video. It works on Cards 2.0 but craps out when you click or when you use swipe
It's not a fun browsing experience. I still support Boost but on video heavy Lemmy communities it a pain.
Another issue is video uploads go to Imgur which is no good for anything remotely nsfw. It would be good if video uploads can go somewhere else.
That being said the upload, comment and view options are far superior to other apps + I really like boost so ¯(ツ)/¯

That file looks like it's barely playable in general.

FFmpeg and MPV can't play it at all:

 undefined

    
max-p@desktop ~ [123]>  mpv https://lemmynsfw.com/pictrs/image/f482b4d7-957a-4ed7-a9ec-0493907a8cb3.mp4
 (+) Video --vid=1 (*) (h264 576x1024 30.000fps)
 (+) Audio --aid=1 (*) (aac 1ch 44100Hz)
File tags:
 Comment: vid:v12044gd0000cp23h1vog65ukmo9lhkg
Cannot load libcuda.so.1
[ffmpeg] Cannot seek backward in linear streams!
[ffmpeg/demuxer] mov,mp4,m4a,3gp,3g2,mj2: stream 1, offset 0x30: partial file
[lavf] error reading packet: Invalid data found when processing input.
[ffmpeg] Cannot seek backward in linear streams!
[ffmpeg/demuxer] mov,mp4,m4a,3gp,3g2,mj2: stream 1, offset 0x30: partial file
[lavf] error reading packet: Invalid data found when processing input.
[ffmpeg] Cannot seek backward in linear streams!
[ffmpeg/demuxer] mov,mp4,m4a,3gp,3g2,mj2: stream 1, offset 0x30: partial file
[lavf] error reading packet: Invalid data found when processing input.
[ffmpeg] Cannot seek backward in linear streams!
[ffmpeg/demuxer] mov,mp4,m4a,3gp,3g2,mj2: stream 1, offset 0x30: partial file
[lavf] error reading packet: Invalid data found when processing input.
[ffmpeg] Cannot seek backward in linear streams!
[ffmpeg/demuxer] mov,mp4,m4a,3gp,3g2,mj2: stream 1, offset 0x30: partial file
[lavf] error reading packet: Invalid data found when processing input.
[ffmpeg] Cannot seek backward in linear streams!
[ffmpeg/demuxer] mov,mp4,m4a,3gp,3g2,mj2: stream 1, offset 0x30: partial file
[lavf] error reading packet: Invalid data found when processing input.
[ffmpeg] Cannot seek backward in linear streams!
[ffmpeg/demuxer] mov,mp4,m4a,3gp,3g2,mj2: stream 1, offset 0x30: partial file
[lavf] error reading packet: Invalid data found when processing input.

VLC seems to be able to, but it complains that it's not proper:

 undefined

    
max-p@desktop ~>  vlc https://lemmynsfw.com/pictrs/image/f482b4d7-957a-4ed7-a9ec-0493907a8cb3.mp4
VLC media player 3.0.20 Vetinari (revision 3.0.20-0-g6f0d0ab126b)
[00005ca01d39d550] main libvlc: Lancement de vlc avec l’interface par défaut. Utiliser « cvlc » pour démarrer VLC sans interface.
[00007ea2f413f5c0] mp4 stream error: no moov before mdat and the stream is not seekable

Some players are more generous in what they tolerate but the file is undoubtedly mildly corrupted.

Lemmy should not let people upload corrupted files in the first place.

Yup, same here. Sometimes, the HD button does the trick, but mostly it's fucked.

I've had it happens but it usually sorts itself out eventually

problem for me also

6 comments