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Why is Convert Format so slow?
haggis999:
I am currently running a Convert Format process to create MP3s from my music collection for use when driving my car, using VBR encoding at normal target quality. The original files are all in FLAC format. Most of this music is classical, which often has a very wide dynamic range, so I'm using DSP to compress this range so that it is always audible above road and engine noise.
My problem is that it is running at a snail's pace, even though I am using a brand new Windows 10 workstation with a fast processor and 32GB of RAM. I left it running overnight and in 10 hours it has only converted 5347 files.
Is this normal? Have I missed some trick for processing more than 2 files at a time?
zybex:
'5347 in 10 hours' is kind of meaningless without knowing how big each file is, both in minutes and size/bitrate. If each file is a 1h concert then you're doing fine...
Is your collection connected directly to the MC computer (via USB or internal disk), or is it on a NAS connected via Wifi or LAN?
Napkin math: 5000 tracks, 5 minutes per track, ~60 MB FLAC per track, that's 300 GB of data to read; if you're converting to 320Kbps MP3, that's about 100GB to write. So, 400GB in 10 hours, that's about 11 MB/sec of data being transferred, or around 100 Mbit/second. This number rings a bell...
So, you might be limited by your networking. If you're on a 100Mbps cabled network, you can't go much faster. If you're on Wifi, switch to cabled or try moving things closer to the Router or Access Point.
If you're using USB or an internal disk, then the issue is something else, as 10 MB/sec is not that much for a directly-attached disk. Check the CPU usage to see if it's pegged at 100%.
haggis999:
--- Quote from: zybex on June 22, 2021, 03:22:45 am ---'5347 in 10 hours' is kind of meaningless without knowing how big each file is, both in minutes and size/bitrate. If each file is a 1h concert then you're doing fine...
Is your collection connected directly to the MC computer (via USB or internal disk), or is it on a NAS connected via Wifi or LAN?
Napkin math: 5000 tracks, 5 minutes per track, ~60 MB FLAC per track, that's 300 GB of data to read; if you're converting to 320Kbps MP3, that's about 100GB to write. So, 400GB in 10 hours, that's about 11 MB/sec of data being transferred, or around 100 Mbit/second. This number rings a bell...
So, you might be limited by your networking. If you're on Wifi or on 100Mbps cabled network, you can't go much faster.
If you're using USB or an internal disk, then the issue is something else, as 10 MB/sec is not that much for a directly-attached disk.
--- End quote ---
These music files are all stored on a Synology NAS with access via what should be a Gigabit wired Ethernet link. They were all ripped from my CD collection. Track durations vary widely with classical music, though very few would last much longer than 30 mins. I've no idea what the average duration might be, but 7 minutes would be my best guess.
I will check my network later today to see if the relevant connection is Gigabit or 100Mbps.
zybex:
You can select those 5000 files in MC and then check the status bar - it tells you the total runtime and total size.
All connections in the path would need to be Gigabit, all it takes is one slow segment.
zybex:
Also, how long is your commute? ;D
5000 files x 7 minutes = 24 days of continuous play, or about 10 months of listening to 2 hours of music per day in your car... I understand wanting to carry your entire collection for freedom of choice, but sometimes it takes longer to pick want you want to hear next instead of just having some curated playlists.
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