Audio Sync issue with MP4s using PS3

**procon** · 02-09-2014, 08:12 AM

Hello,

I have purchased Mezzmo quite some time ago and it seems as if I have a weird audio sync issue. Ill play the movie then over time the movie will become out of sync. I can play it on any other device w/o mezzmo and its fine. I was reading on the forum that you guys emailed someone a modified ps3 file? Do i need that? All my movies are mp4s which the PS3 doesn't need to transcode.

Here is the FFmpeg info;
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, mov,mp4,m4a,3gp,3g2,mj2, from 'f:\Movies\Nightmare on Elm Steet (2010) (DVD).mp4':
Metadata:
major_brand : MSNV
minor_version : 512
compatible_brands: isomiso2avc1MSNV
Duration: 01:35:23.72, start: 0.000000, bitrate: 4139 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 4005 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 59.94 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s
Metadata:
handler_name : SoundHandler
At least one output file must be specified

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

---> DB Level Info: 31, 77
---> Frame rate: 29.97
---> Aspect ratio: 16:9 PAR=1

**Paul** · 02-09-2014, 11:25 AM

Given that Mezzmo is streaming your MP4 file directly to your PS3, then any audio sync issues will most likely be caused by your PS3's firmware not being able to keep the video and audio in sync with that particular MP4 encoding. Mezzmo is simply delivering the MP4 file to your PS3 without any modification. As a test, right-click on one of the MP4 files and click 'Pre-transcode Files'. On the Pre-transcode Files dialog, select your PS3 and click 'Choose Formats'. On the Pre-transcode Formats dialog, select the bolded format and select the 'Force full transcode of all channels' checkbox. Click OK and the select the 'Pre-transcode file even if they match the device supported formats' checkbox. Click OK to start transcoding. Wait until it has completed and then try to stream the MP4 file using Mezzmo. If there are no sync issues, then it does look like your MP4 files' encoding may not be being handled well by your PS3's firmware.