Hello,
I used AVPlayer in my project to play network movie.
Most movie could play normally, but I found the sound will disappear sometimes if I play specified 4K video network stream.
The video will continue playing but audio stops after video is played for a while.
If I pause player and then resume, the sound will be back but disappeared again after several seconds
Check AVPlayerItem status:
isPlaybackLikelyToKeepUp` == true
isPlaybackBufferEmpty` = false
player.volume > 0
According the value above, it seems not cause by empty playback buffer or volume issue. I am so confused for this situation.
Movie information
Video
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High L5.1
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Bit rate mode : Variable
Bit rate : 100.0 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 (30000/1001) FPS
Audio
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 5 min 19 s
Bit rate mode : Constant
Bit rate : 192 kb/s
Nominal bit rate : 48.0 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Does anyone know if AVPlayer has this limitations when playing high-bitrate movie streams, and are there any solutions?
jessiel
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Hello~I want to ask a storage issue I had recently.
I found that my file writing will fail frequently if the iOS device enable iCloud Photos and the used storage is more than device storage.
ex. iCloud Photos 707.8 GB used and choose to optimize iPhone Storage
iOS Device UI shows that 185 GB is available (total 256 GB in device)
What I need is to write a big file to upload later and I use FileHandle to generate it:
ex.
let fileWriter = try? FileHandle(forWritingTo: url)
while !bufferIsAtEnd() {
let data = readChunckFromBuffer()
do{
try fileWriter.write(contentsOf: data)
}catch{
return false
}
}
fileWriter.close()
The file needs about 40GB space to write, but I always get disk full error even though iOS UI shows me the device space is enough ( 185GB )
This issue disappeared if I turn off iCloud Photos.
I think that the available 185 GB seems to be locked by iCloud storage optimization(The total device storage 256GB is smaller than 707GB used in iCloud Photos) and makes my file writing failed.
I could not always turn off iCloud Photos since it is inconvenient but I do not know how to resolve the disk full issue when iCloud Photos enabled.
Any suggestion will be very appreciated!