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 nostr:nprofile1qqsyvrp9u6p0mfur9dfdru3d853tx9mdjuhkphxuxgfwmryja7zsvhqppemhxue69uhkummn9ekx7mp0qythwumn8ghj7anfw3hhytnwdaehgu339e3k7mf0qyghwumn8ghj7mn0wd68ytnhd9hx2tch2deau what is Amethyst using to compress video files when I upload them? 
 This https://github.com/AbedElazizShe/LightCompressor  
 Times out for media upload to nostr.build if I select medium or high quality on a 10 min YouTube rip.

The one video I uploaded at low quality takes forever to load from nostr.build to Amethyst. 

Recommend using handbrake. 

I've been using an android app called handbrake+ for the last year to upload directly to nostr.build but the last couple weeks it hasn't been working so I've been experimenting with the built in Amethyst compression, but my experience hasn't been great so far. 
 Do you mean that it takes forever to upload or download? nostr.build also compresses it further so sometimes it takes a while indeed.  
 Both. 

nostr:nevent1qqsv7c9ruz7uvqxc6u7ytqlc7rrrrqc5xehqd33fe7u9lcf6m9yhyvgpzemhxue69uhkummnw3ex2mrfw3jhxtn0wfnj7q3qp5ryszcvdca78jdp5ewhu67zpyfz042m7nrha6mqx7a8wakrqrkqxpqqqqqqz7n8zh6

I'm using Amethyst on a pixel 9 pro so good hardware and connected to good broadband Internet.  
 Its slow even on my desktop over wifi.  
 Actually the browser gives up and fails to load the video. 
 nostr:nprofile1qqsglv2qkn5dmmuhee9cy8fywfu2rfp4xd3xy0myqg2gfvmjl9yqqrqpzpmhxue69uhkummnw3ezumrpdejqzythwden5te0wghxkmm2d9exztnfduq3kamnwvaz7tmjv4kxz7fwvf5hgcm0d9h8qctjdvhxxmmdspqdww any chance you can see what's going on with this file?  
 I can’t troubleshoot now, but from the experience with YT rips and trying to transcode them, usually makes them either bigger or corrupted. We’ve seen a fair share of such uploads in the past. You can try “curl -O <url>” and then use ffprobe to see what is going on with it. Usually it is either broken bframe or something to that tune. Uploading the direct YT download is the most optimal way to share them. 
 IMO amethyst using handbrake solves this issue 
 YT videos are already well compressed and none of the transcoding makes them smaller at the same resolution. And yes, ffmpeg based solutions are much better 
 Times out in amethyst. YTDLnis rips YUGE videos from YT. I always have to handbrake them. Been having issues with the app lately. Over 200mb for a 10 min video.  
 try going to https://nostr.build/account/ and upload from there 
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x74f36ad5e580] moov atom not found
45RoBbHjcuJSq3V2.mp4: Invalid data found when processing input

File is corrupted, so just use web interface of NB and upload as is, no transcoding