x264 Error output in megui: Exception in readStdErr

[ManiacDC]

Hi, I took a break from encoding for a few months. I started using megui again, updated it, ran a couple encodes and I keep not being able to see any of the stderror data I used to be able to see, such as the ssim calculation and the number of P,B, and I frames. Can anyone shed some light on this for me? (also please let me know if I should be asking this in the x264 forum). I have included examples of what I'm getting now (above) compared to what I used to get (below).

Thanks!

(On a side note, did the way crf is computed change or something? using the same settings I now get a much larger file than I used to when doing the same encode)

[Information] Log for job7 (video, [RAWka]_Porfy_no_Nagai_Tabi_01_(BS-FUJI_1280x720_DivX680).[EE1007FC].avs -> porfy crf25.mp4)
-[Information] [3/8/2009 4:26:41 PM] Started handling job
-[Information] [3/8/2009 4:26:41 PM] Preprocessing
-[NoImage] Job commandline: "C:\Program Files (x86)\megui\tools\x264\x264.1066M.exe" --crf 25.0 --level 4.1 --keyint 240 --min-keyint 24 --ref 7 --mixed-refs --no-fast-pskip --bframes 16 --b-pyramid --weightb --deblock 1:1 --subme 7 --trellis 1 --partitions p8x8,b8x8,i4x4,i8x8 --8x8dct --me umh --merange 24 --threads auto --thread-input --sar 1:1 --progress --no-psnr --output "E:\My Videos\Encoding\Porfy\porfy crf25.mp4" "E:\My Videos\Encoding\Porfy\[RAWka]_Porfy_no_Nagai_Tabi_01_(BS-FUJI_1280x720_DivX680).[EE1007FC].avs"
-[Information] [3/8/2009 4:26:41 PM] Encoding started
-[NoImage] Standard output stream:
-[NoImage] Standard error stream
--[NoImage] avis [info]: 1280x720 @ 23.98 fps (35243 frames)
--[NoImage] x264 [info]: using SAR=1/1
--[NoImage] x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 PHADD SSE4.1 Cache64
--[NoImage] x264 [info]: profile High, level 4.1
--[NoImage] mp4 [info]: initial delay 2002 (scale 24000)
--[NoImage] Exception in readStdErr: Length cannot be less than zero.
--[NoImage] Parameter name: length
-[Information] Final statistics
--[NoImage] Constant Quality Mode: Quality 25 computed...
--[NoImage] Video Bitrate Obtained (approximate): 1104 kbit/s
-[Information] [3/8/2009 4:50:16 PM] Postprocessing
--[Information] Deleting intermediate files
-[Information] [3/8/2009 4:50:16 PM] Job completed

-[Information] Log for job9 (video, The Three Stooges_WSBK-DT_28_09_2008_09_45_02.avs -> The Three Stooges_WSBK-DT_28_09_2008_09_45_02.mp4)
--[Information] [10/25/2008 12:43:39 AM] Started handling job
--[Information] [10/25/2008 12:43:39 AM] Preprocessing
--[NoImage] Job commandline: "C:\Program Files (x86)\megui\tools\x264\x264.exe" --crf 20.0 --level 4.1 --keyint 240 --min-keyint 24 --ref 16 --mixed-refs --no-fast-pskip --bframes 16 --b-pyramid --weightb --subme 7 --trellis 1 --partitions p8x8,b8x8,i4x4,i8x8 --8x8dct --me umh --merange 24 --threads auto --thread-input --sar 1:1 --progress --no-psnr --output "E:\My Videos\The Three Stooges\The Three Stooges_WSBK-DT_28_09_2008_09_45_02.mp4" "E:\My Videos\The Three Stooges\The Three Stooges_WSBK-DT_28_09_2008_09_45_02.avs"
--[Information] [10/25/2008 12:43:39 AM] Encoding started
--[NoImage] Standard output stream:
--[NoImage] Standard error stream
---[NoImage] avis [info]: 640x480 @ 23.98 fps (23930 frames)
---[NoImage] x264 [info]: using SAR=1/1
---[NoImage] x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
---[NoImage] mp4 [info]: initial delay 2002 (scale 24000)
---[NoImage]
---[NoImage] x264 [info]: slice I:168 Avg QP:18.93 size: 24793
---[NoImage] x264 [info]: slice P:10235 Avg QP:21.21 size: 10284
---[NoImage] x264 [info]: slice B:13527 Avg QP:23.08 size: 3830
---[NoImage] x264 [info]: consecutive B-frames: 1.6% 59.4% 25.3% 13.0% 0.3% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.4%
---[NoImage] x264 [info]: mb I I16..4: 4.1% 69.7% 26.3%
---[NoImage] x264 [info]: mb P I16..4: 0.7% 5.8% 1.5% P16..4: 47.1% 23.7% 16.0% 0.0% 0.0% skip: 5.3%
---[NoImage] x264 [info]: mb B I16..4: 0.1% 0.6% 0.2% B16..8: 50.7% 1.9% 3.4% direct: 5.9% skip:37.3% L0:39.6% L1:50.9% BI: 9.4%
---[NoImage] x264 [info]: 8x8 transform intra:71.9% inter:69.1%
---[NoImage] x264 [info]: ref P L0 58.2% 14.3% 7.6% 3.9% 2.9% 2.7% 2.2% 1.3% 1.1% 1.1% 0.9% 0.9% 0.8% 0.8% 0.7% 0.6%
---[NoImage] x264 [info]: ref B L0 72.0% 11.6% 4.4% 2.4% 1.8% 1.6% 1.3% 0.9% 0.7% 0.7% 0.6% 0.6% 0.5% 0.5% 0.4%
---[NoImage] x264 [info]: ref B L1 95.6% 4.4%
---[NoImage] x264 [info]: SSIM Mean Y:0.9792123
---[NoImage] x264 [info]: kb/s:1292.4
---[NoImage] encoded 23930 frames, 5.21 fps, 1292.45 kb/s
--[Information] Final statistics
---[NoImage] Constant Quality Mode: Quality 20 computed...
---[NoImage] Video Bitrate Obtained (approximate): 1294 kbit/s
--[Information] [10/25/2008 2:00:11 AM] Postprocessing
---[Information] Deleting intermediate files
--[Information] [10/25/2008 2:00:11 AM] Job completed

[Adub]

Yes, crf changed. But not in MeGUI, it changed in x264. Just run some tests and figure out what your new desired crf is.

Oh, and do you mean this:
---[NoImage] x264 [info]: SSIM Mean Y:0.9792123 because that's in you log.

The number of B-frames are in there as well. For example, 59.4% of the time you used 2 b-frames.

[ManiacDC]

Yes, crf changed. But not in MeGUI, it changed in x264. Just run some tests and figure out what your new desired crf is.

Oh, and do you mean this:
because that's in you log.

The number of B-frames are in there as well. For example, 59.4% of the time you used 2 b-frames.
Hi merlin, thanks, about the note regarding the crf change (I'm aware this would be an x264 change, megui is just a gui), it appears 25 is now pretty similar to 20, at least for the video I was encoding.


Yes, I mean regarding the SSIM output. It was in my old log (the bottom one), it is now not outputting it into the log (I am using x264 1125 now I think and it's still producing the below error).

I am getting this:
--[NoImage] Exception in readStdErr: Length cannot be less than zero.

If I encode the video from the command prompt I *do* get the output (SSIM, B frames, P frames, etc), but not in megui, I just get that error.

Thanks.

[Mottodj]

Have same problem, occurs when using FFvideoSource in avs script. With DirectShowSource it's alright. :confused:

[ManiacDC]

It's still happening for me, just not quite so frequently.

[Sharktooth]

CRF mean varies depending on the settings.
about the stderr problem... update megui and the tools thru the auto-update function.
when megui cant read the stderr displays that message in the log. that means the encoder crashed with no output.

[ManiacDC]

My settings were the same, so I'm not sure. Anyway I got it where I wanted it again.

I haven't gotten an error too recently but I haven't done much encoding in the past month (just a file or two). I'll keep an eye out for the error and see if I ever get it again. I always keep megui/tools up to date via auto update.

Thanks.