Stuttering after fast-forwarding

[jyron]

Hi,

when streaming some MKV files, they play fine when played from the start, but when I play them after fast-forwarding, they start to stutter. This is only happening to a few MKV files though. I am using a Sony BDP-S770 blu-ray with the Sony BDP, HT, SMP profile. I am sending the files via ethernet. I've tried streaming the original file and pre-transcoding in all the available formats but nothing seems to work.

The ffmepg info is:
ffmpeg version N-50460-g393dcbf Copyright (c) 2000-2013 the FFmpeg developers
built on Jun 27 2013 17:20:20 with gcc 4.6.2 (GCC)
configuration: --enable-memalign-hack --arch=x86_64 --target-os=mingw32 --cross-prefix=x86_64-w64-mingw32- --enable-static --disable-shared --enable-zlib --disable-postproc --prefix=/home/peter/ffmpeg/build/gpl64 --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --extra-cflags=-I/home/peter/cc64/include --extra-ldflags=-L/home/peter/cc64/lib --pkg-config=pkg-config --disable-w32threads --enable-zlib
libavutil 52. 17.103 / 52. 17.103
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.102 / 54. 63.102
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 41.100 / 3. 41.100
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
Input #0, matroska,webm, from 'C:\Users\Home\Videos\Movies\Pacific.Rim.2013.1080 p.WEB-DL.H264-PublicHD\Pacific.Rim.2013.1080p.WEB-DL.H264-PublicHD.mkv':
Metadata:
creation_time : 2013-10-01 08:07:04
Duration: 02:11:14.85, start: 0.000000, bitrate: 5632 kb/s
Chapter #0.0: start 0.000000, end 555.000000
Metadata:
title : 1.
Chapter #0.1: start 555.000000, end 1122.000000
Metadata:
title : 2.
Chapter #0.2: start 1122.000000, end 1390.000000
Metadata:
title : 3.
Chapter #0.3: start 1390.000000, end 1985.000000
Metadata:
title : 4.
Chapter #0.4: start 1985.000000, end 2569.000000
Metadata:
title : 5.
Chapter #0.5: start 2569.000000, end 3006.000000
Metadata:
title : 6.
Chapter #0.6: start 3006.000000, end 3673.000000
Metadata:
title : 7.
Chapter #0.7: start 3673.000000, end 4487.000000
Metadata:
title : 8.
Chapter #0.8: start 4487.000000, end 4943.000000
Metadata:
title : 9.
Chapter #0.9: start 4943.000000, end 5531.000000
Metadata:
title : 10.
Chapter #0.10: start 5531.000000, end 6116.000000
Metadata:
title : 11.
Chapter #0.11: start 6116.000000, end 6698.000000
Metadata:
title : 12.
Chapter #0.12: start 6698.000000, end 7161.000000
Metadata:
title : 13.
Chapter #0.13: start 7161.000000, end 7337.000000
Metadata:
title : 14.
Chapter #0.14: start 7337.000000, end 7874.848000
Metadata:
title : 15.
Stream #0:0(eng): Video: h264 (High), yuv420p, 1918x1078 [SAR 1:1 DAR 137:77], 23.98 fps, 23.98 tbr, 1k tbn, 2k tbc (default)
Stream #0:1(eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s (default)
Stream #0:2(spa): Audio: aac, 48000 Hz, stereo, fltp
Stream #0:3(eng): Subtitle: subrip
Stream #0:4(fre): Subtitle: subrip
Stream #0:5(spa): Subtitle: subrip
Stream #0:6(por): Subtitle: subrip
At least one output file must be specified

<MEZZMO>: Child process ended with code: 109, ExitCode=1


---> DB Level Info: 40, 100
---> Frame rate: 23.98
---> Aspect ratio: 137:77

Thanks for your help.

[Toledo]

I was having the same problem with big files as 15GB plus.... now that I redone all my videos to 5GB max, it fast forward normally...

[jyron]

Never had a problem with big files - have been able to stream 15GB plus with no problems - this one's only 5GB. So I'm a bit confused...

[Paul]

I don't think the size of the video file will be the cause. It's more likely the video bitrate may the reason. High video bitrates can cause some devices to stutter since either: (i) their firmware cannot decode and play files with such a high bitrate, or (ii) your home network's bandwidth is not capable of transmitting that bitrate. Since you say you have Ethernet cabling, your home network should be fine. The MKV has a 5Mb/sec video bitrate which is high, but it should be played OK by your Sony BDP. Another reason may be the encoding of the file itself. Does the MKV file play OK on another device or software media player like VLC? If it does, then it's best we see a set of logs (see http://forum.conceiva.com/showthread.php/419-FAQ-How-to-turn-on-diagnostic-logging) and restart your Mezzmo server. Reproduce the problem and when it starts to stutter, stop your Mezzmo server and exit Mezzmo. Zip up all the logs and email them to us at support [at] conceiva [dot] com.

[jyron]

The MKV file plays fine on VLC. It also plays fine with Mezzmo as long as I don't fast-forward it. I've sent you the log files. Thanks for your help.

[Paul]

Understand - we've got your logs and will report back via email after we analyze them.