Error: Cannot encode tile

Anything and everything to do with DCP-o-matic.
scottclouthier
Posts: 6
Joined: Sun Feb 16, 2020 4:29 am

Error: Cannot encode tile

Post by scottclouthier »

I've gotten the error code "Cannot encode tile" twice since I updated to the newest software version (2.14.26).

With the first title, the encode stopped about 10 minutes in. I was able to successfully finish it on the second try, but the resulting DCP had lots of video glitches (coloured "specks" in horizonal rows) and the picture dropped out a few times.

Today I tried again with a different video file and again I got the same error code. I decided to try converting the file from H.264 to ProRes 422 before I give it another go.

Has anyone else encountered this error? I've been successfully running DCP-o-matic on this machine (Core i7 6700 w/ 48GB ram) for over 2 years with good success. It's only recently I've encountered these consistent errors.
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Carsten
Posts: 2804
Joined: Tue Apr 15, 2014 9:11 pm
Location: Germany

Re: Error: Cannot encode tile

Post by Carsten »

Is this on a local disc/SSD? To me, it sounds like a hardware (RAM?) issue. Are you sure the target disc is able to hold files larger 4GB? To exclude FAT32 explicitly.

- Carsten
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scottclouthier
Posts: 6
Joined: Sun Feb 16, 2020 4:29 am

Re: Error: Cannot encode tile

Post by scottclouthier »

Target disk is a 1TB SSD formatted HFS+.
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Carsten
Posts: 2804
Joined: Tue Apr 15, 2014 9:11 pm
Location: Germany

Re: Error: Cannot encode tile

Post by Carsten »

Weird. Maybe upload the metadata file and a log?

I have only ever heard about corruption like this when there were hardware errors involved. And only very rarely, a few times on this forum or the mailinglist.

So, that is on a Mac? I was still running 2.14.25 on my Mac Book - I just installed 2.14.26 and ran a test of an h.264/MP4 encode to exclude an obvious error in the code - the encode ran through smoothly, no errors in the resulting DCP.

Hmm, as a test - could you try to reduce the number of encoding threads to 4 (I assume it was set to 8 before)? This is just to see wether overheating could be one possible reason, as it seems you are getting issues only after some time.

- Carsten
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scottclouthier
Posts: 6
Joined: Sun Feb 16, 2020 4:29 am

Re: Error: Cannot encode tile

Post by scottclouthier »

Trying again with 4 threads and saving to a different SSD.

If this works, I will try next time with 8 threads on the same SSD.

I'll upload the metafile and log if I have any problems this time around.

Thanks for the help.
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scottclouthier
Posts: 6
Joined: Sun Feb 16, 2020 4:29 am

Re: Error: Cannot encode tile

Post by scottclouthier »

Crashed :(

Metadata:

Code: Select all

<?xml version="1.0"?>
<Metadata>
  <Version>37</Version>
  <Name>Red Snow</Name>
  <UseISDCFName>1</UseISDCFName>
  <DCPContentType>FTR</DCPContentType>
  <Container>185</Container>
  <Resolution>2K</Resolution>
  <J2KBandwidth>200000000</J2KBandwidth>
  <ISDCFMetadata>
    <ContentVersion>1</ContentVersion>
    <AudioLanguage></AudioLanguage>
    <Territory></Territory>
    <Rating></Rating>
    <Studio></Studio>
    <Facility></Facility>
    <TempVersion>0</TempVersion>
    <PreRelease>0</PreRelease>
    <RedBand>0</RedBand>
    <Chain></Chain>
    <TwoDVersionOfThreeD>0</TwoDVersionOfThreeD>
    <MasteredLuminance></MasteredLuminance>
  </ISDCFMetadata>
  <VideoFrameRate>24</VideoFrameRate>
  <ISDCFDate>20200216</ISDCFDate>
  <AudioChannels>6</AudioChannels>
  <ThreeD>0</ThreeD>
  <Sequence>1</Sequence>
  <Interop>1</Interop>
  <Signed>1</Signed>
  <Encrypted>0</Encrypted>
  <Key>bb1e9485db28247655160ab4e020dd51</Key>
  <ContextID>5771a544-006f-41a1-a037-be9f64cf5583</ContextID>
  <ReelType>0</ReelType>
  <ReelLength>2000000000</ReelLength>
  <UploadAfterMakeDCP>0</UploadAfterMakeDCP>
  <ReencodeJ2K>0</ReencodeJ2K>
  <UserExplicitVideoFrameRate>0</UserExplicitVideoFrameRate>
  <Playlist>
    <Content>
      <Type>FFmpeg</Type>
      <Path mtime="1579634876">/Users/scott/Desktop/RedSnow_English_only_HD_185_rec709_prores422hq_010919.mp4</Path>
      <Digest>d986d27e58e95495edf0858ae4a418e52681388912</Digest>
      <Position>0</Position>
      <TrimStart>0</TrimStart>
      <TrimEnd>0</TrimEnd>
      <VideoFrameRate>23.97602397602398</VideoFrameRate>
      <VideoLength>137898</VideoLength>
      <VideoWidth>1920</VideoWidth>
      <VideoHeight>1080</VideoHeight>
      <VideoFrameType>2d</VideoFrameType>
      <LeftCrop>0</LeftCrop>
      <RightCrop>0</RightCrop>
      <TopCrop>21</TopCrop>
      <BottomCrop>21</BottomCrop>
      <Scale>
        <Ratio>185</Ratio>
      </Scale>
      <ColourConversion>
        <InputTransferFunction>
          <Type>Gamma</Type>
          <Gamma>2.2</Gamma>
        </InputTransferFunction>
        <YUVToRGB>1</YUVToRGB>
        <RedX>0.64</RedX>
        <RedY>0.33</RedY>
        <GreenX>0.3</GreenX>
        <GreenY>0.6</GreenY>
        <BlueX>0.15</BlueX>
        <BlueY>0.06</BlueY>
        <WhiteX>0.3127</WhiteX>
        <WhiteY>0.329</WhiteY>
        <OutputGamma>2.6</OutputGamma>
      </ColourConversion>
      <YUV>1</YUV>
      <FadeIn>0</FadeIn>
      <FadeOut>0</FadeOut>
      <AudioGain>-4</AudioGain>
      <AudioDelay>0</AudioDelay>
      <AudioStream>
        <Name>und</Name>
        <Id>2</Id>
        <FrameRate>48000</FrameRate>
        <Length>276072400</Length>
        <Mapping>
          <InputChannels>2</InputChannels>
          <OutputChannels>16</OutputChannels>
          <Gain Input="0" Output="0">1</Gain>
          <Gain Input="0" Output="1">0</Gain>
          <Gain Input="0" Output="2">0</Gain>
          <Gain Input="0" Output="3">0</Gain>
          <Gain Input="0" Output="4">0</Gain>
          <Gain Input="0" Output="5">0</Gain>
          <Gain Input="0" Output="6">0</Gain>
          <Gain Input="0" Output="7">0</Gain>
          <Gain Input="0" Output="8">0</Gain>
          <Gain Input="0" Output="9">0</Gain>
          <Gain Input="0" Output="10">0</Gain>
          <Gain Input="0" Output="11">0</Gain>
          <Gain Input="0" Output="12">0</Gain>
          <Gain Input="0" Output="13">0</Gain>
          <Gain Input="0" Output="14">0</Gain>
          <Gain Input="0" Output="15">0</Gain>
          <Gain Input="1" Output="0">0</Gain>
          <Gain Input="1" Output="1">1</Gain>
          <Gain Input="1" Output="2">0</Gain>
          <Gain Input="1" Output="3">0</Gain>
          <Gain Input="1" Output="4">0</Gain>
          <Gain Input="1" Output="5">0</Gain>
          <Gain Input="1" Output="6">0</Gain>
          <Gain Input="1" Output="7">0</Gain>
          <Gain Input="1" Output="8">0</Gain>
          <Gain Input="1" Output="9">0</Gain>
          <Gain Input="1" Output="10">0</Gain>
          <Gain Input="1" Output="11">0</Gain>
          <Gain Input="1" Output="12">0</Gain>
          <Gain Input="1" Output="13">0</Gain>
          <Gain Input="1" Output="14">0</Gain>
          <Gain Input="1" Output="15">0</Gain>
        </Mapping>
        <FirstAudio>0</FirstAudio>
        <CodecName>aac</CodecName>
      </AudioStream>
      <FirstVideo>0</FirstVideo>
      <ColorRange>1</ColorRange>
      <ColorPrimaries>1</ColorPrimaries>
      <ColorTransferCharacteristic>1</ColorTransferCharacteristic>
      <Colorspace>1</Colorspace>
      <BitsPerPixel>12</BitsPerPixel>
    </Content>
  </Playlist>
</Metadata>
Log:

Code: Select all

Sun 16 Feb 20:20:22 2020: Probing with "/Applications/DCP-o-matic2.app/Contents/MacOS/ffprobe" "/Users/scott/Desktop/RedSnow_English_only_HD_185_rec709_prores422hq_010919.mp4" 2> "/Volumes/Working Drive/Red Snow/ffprobe.log"
Sun 16 Feb 20:20:22 2020: Sub-job Computing digest starting
Sun 16 Feb 20:20:22 2020: Video length obtained from header as 137898 frames
Sun 16 Feb 20:20:22 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:22 2020: FFmpeg: Warning: data is not aligned! This can lead to a speed loss
Sun 16 Feb 20:20:22 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:22 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:22 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:22 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:33 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:37 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:37 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:38 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:38 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:38 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:38 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:38 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:39 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:39 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:39 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:39 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:39 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:39 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:39 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:40 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:40 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:45 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:45 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:47 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:51 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:51 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:51 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:51 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:20:51 2020: Creating new resampler from 48000 to 47952 with 2 channels
Sun 16 Feb 20:20:51 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:22:34 2020: DCP-o-matic 2.14.26 git d476fc3e29 using libavcodec 58.42.100, libavfilter 7.46.101, libavformat 58.24.100, libavutil 56.24.101, libswscale 5.4.100, libssh 0.7.4/openssl/zlib, libdcp 1.6.14 git b651392d70
Sun 16 Feb 20:22:34 2020: Host name Scotts-iMac.local
Sun 16 Feb 20:22:34 2020: DCP-o-matic built in optimised mode.
Sun 16 Feb 20:22:34 2020: libdcp built in optimised mode.
Sun 16 Feb 20:22:34 2020: Built for 64-bit
Sun 16 Feb 20:22:34 2020: CPU: Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz, 8 processors
Sun 16 Feb 20:22:34 2020: Content: RedSnow_English_only_HD_185_rec709_prores422hq_010919.mp4 d986d27e58e95495edf0858ae4a418e52681388912 0 23.97602397602398 - video: length 137898 frames, size 1920x1080 - audio: stream channels 2 rate 48000 ffmpeg: audio id 2  subtitle none filters 
Sun 16 Feb 20:22:34 2020: DCP video rate 24 fps
Sun 16 Feb 20:22:34 2020: 4 threads
Sun 16 Feb 20:22:34 2020: J2K bandwidth 200000000
Sun 16 Feb 20:22:34 2020: Transcode job starting
Sun 16 Feb 20:22:34 2020: Sub-job Checking existing image data starting
Sun 16 Feb 20:22:34 2020: Could not open existing asset at /Volumes/Working Drive/Red Snow/video/185_2K_a233e913ac7a232ec79ef986271eb54f_24_200000000_P_I_0_551592000.mxf (errno=2)
Sun 16 Feb 20:22:34 2020: Sub-job Encoding starting
Sun 16 Feb 20:22:34 2020: New graph for 1920x1080, pixel format 0
Sun 16 Feb 20:22:34 2020: Creating new resampler from 48000 to 47952 with 2 channels
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carl
Site Admin
Posts: 2548
Joined: Thu Nov 14, 2013 2:53 pm

Re: Error: Cannot encode tile

Post by carl »

This is a strange one indeed; the error is from the JPEG2000 encoding library and I can't remember ever seeing it before, or hearing anybody else mention it.

Is it feasible for you to do some memory checks with something like memtest86?
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scottclouthier
Posts: 6
Joined: Sun Feb 16, 2020 4:29 am

Re: Error: Cannot encode tile

Post by scottclouthier »

I have not had a chance to test memory yet, but I ran it once more and again got the "Cannot encode tile" error (no crash this time though).

Here is the log from the latest attempt.

Code: Select all

Wed 19 Feb 21:21:55 2020: Probing with "/Applications/DCP-o-matic 2.app/Contents/MacOS/ffprobe" "/Users/scott/Desktop/RedSnow_English_only_HD_185_rec709_prores422hq_010919.mp4" 2> "/Volumes/NVME/Red Snow/ffprobe.log"
Wed 19 Feb 21:21:55 2020: Sub-job Computing digest starting
Wed 19 Feb 21:21:55 2020: Video length obtained from header as 137898 frames
Wed 19 Feb 21:21:55 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:21:55 2020: FFmpeg: Warning: data is not aligned! This can lead to a speed loss
Wed 19 Feb 21:21:55 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:21:55 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:21:55 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:21:56 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:01 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:05 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:22:05 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:05 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:22:05 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:05 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:22:05 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:11 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:22:11 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:12 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:22:12 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:13 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:22:13 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:13 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:22:13 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:14 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:22:14 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:15 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:22:15 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:17 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:22:17 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:18 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:22:18 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:20 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:22:20 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:24 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:24 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:24 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:25 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:25 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:26 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:27 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:27 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:27 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:22:28 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:23:12 2020: DCP-o-matic 2.14.26 git d476fc3e29 using libavcodec 58.42.100, libavfilter 7.46.101, libavformat 58.24.100, libavutil 56.24.101, libswscale 5.4.100, libssh 0.7.4/openssl/zlib, libdcp 1.6.14 git b651392d70
Wed 19 Feb 21:23:12 2020: Host name Scotts-iMac.local
Wed 19 Feb 21:23:12 2020: DCP-o-matic built in optimised mode.
Wed 19 Feb 21:23:12 2020: libdcp built in optimised mode.
Wed 19 Feb 21:23:12 2020: Built for 64-bit
Wed 19 Feb 21:23:12 2020: CPU: Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz, 8 processors
Wed 19 Feb 21:23:12 2020: Content: RedSnow_English_only_HD_185_rec709_prores422hq_010919.mp4 d986d27e58e95495edf0858ae4a418e52681388912 0 23.97602397602398 - video: length 137898 frames, size 1920x1080 - audio: stream channels 2 rate 48000 ffmpeg: audio id 2  subtitle none filters 
Wed 19 Feb 21:23:12 2020: DCP video rate 24 fps
Wed 19 Feb 21:23:12 2020: 8 threads
Wed 19 Feb 21:23:12 2020: J2K bandwidth 200000000
Wed 19 Feb 21:23:12 2020: Transcode job starting
Wed 19 Feb 21:23:12 2020: Sub-job Checking existing image data starting
Wed 19 Feb 21:23:12 2020: Could not open existing asset at /Volumes/NVME/Red Snow/video/185_2K_a233e913ac7a232ec79ef986271eb54f_24_200000000_P_I_0_551592000.mxf (errno=2)
Wed 19 Feb 21:23:12 2020: Sub-job Encoding starting
Wed 19 Feb 21:23:12 2020: New graph for 1920x1080, pixel format 0
Wed 19 Feb 21:23:12 2020: Creating new resampler from 48000 to 47952 with 2 channels
Wed 19 Feb 21:39:44 2020: ERROR: Local encode failed (Cannot encode tile
)
Wed 19 Feb 21:39:44 2020: Terminating thread 1 of 8
Wed 19 Feb 21:39:46 2020: Thread terminated
Wed 19 Feb 21:39:46 2020: Terminating thread 2 of 8
Wed 19 Feb 21:39:46 2020: Thread terminated
Wed 19 Feb 21:39:46 2020: Terminating thread 3 of 8
Wed 19 Feb 21:39:46 2020: Thread terminated
Wed 19 Feb 21:39:46 2020: Terminating thread 4 of 8
Wed 19 Feb 21:39:46 2020: Thread terminated
Wed 19 Feb 21:39:46 2020: Terminating thread 5 of 8
Wed 19 Feb 21:39:46 2020: Thread terminated
Wed 19 Feb 21:39:46 2020: Terminating thread 6 of 8
Wed 19 Feb 21:39:46 2020: Thread terminated
Wed 19 Feb 21:39:46 2020: Terminating thread 7 of 8
Wed 19 Feb 21:39:46 2020: Thread terminated
Wed 19 Feb 21:39:46 2020: Terminating thread 8 of 8
Wed 19 Feb 21:39:46 2020: Thread terminated
Wed 19 Feb 21:39:46 2020: WARNING: Finishing writer with a left-over queue of 21:
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7095, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7096, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7097, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7098, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7099, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7100, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7101, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7102, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7103, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7104, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7105, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7106, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7107, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7108, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7109, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7110, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7111, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7112, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7113, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7114, eyes 0
Wed 19 Feb 21:39:46 2020: WARNING: - type FULL, frame 7115, eyes 0
Wed 19 Feb 21:39:46 2020: ERROR: Error in job: Cannot encode tile
 (It is not known what caused this error.  Please report this problem by using Help -> Report a problem or via email to carl@dcpomatic.com)
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scottclouthier
Posts: 6
Joined: Sun Feb 16, 2020 4:29 am

Re: Error: Cannot encode tile

Post by scottclouthier »

Welp, looks like I do have RAM issues.

Going to run the encode on a Windows machine I use as a Plex server. And order some new RAM sticks...

Thanks for your help.
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Carsten
Posts: 2804
Joined: Tue Apr 15, 2014 9:11 pm
Location: Germany

Re: Error: Cannot encode tile

Post by Carsten »

With 48GBytes, there are certainly chances. For sure, with 8 computing threads, DCP-o-matic isn't nearly using it up, but, under heavy load conditions, which multithreaded J2K compression certainly qualifies for, data corruption may occur.

I don't know the actual RAM configuration of this iMac, but you may try to take some of the RAM out and may be able to find those that cause errors. But may be you already performed memtest/hardwaretest by now.

- Carsten
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