# record data and synchronous shift
**URL:** https://community.wowza.com/t/record-data-and-synchronous-shift/37437
**Category:** Wowza Streaming Engine
**Created:** [January 27, 2015, 4:59am UTC](https://community.wowza.com/t/record-data-and-synchronous-shift/37437 "2015-01-27T04:59:06Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@burak\_guder](https://community.wowza.com/u/burak_guder)
#### Post date: [January 27, 2015, 4:59am UTC](https://community.wowza.com/t/record-data-and-synchronous-shift/37437/1 "2015-01-27T04:59:06Z")
hi wowza team
live recording ffmpeg input
```auto
ffmpeg version 2.2.4 Copyright (c) 2000-2014 the FFmpeg developers
built on Jul 9 2014 18:01:45 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)
configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --extra-libs=-ldl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvpx --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libvo-aacenc --enable-libxvid --disable-ffplay --enable-gpl --enable-postproc --enable-nonfree --enable-avfilter --enable-pthreads
libavutil 52. 66.100 / 52. 66.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 2.100 / 4. 2.100
libswscale 2. 5.102 / 2. 5.102
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100
[COLOR="#FF0000"][mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -109350 in STTS, at 129 st:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -72000 in STTS, at 1205 st:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -155520 in STTS, at 4976 st:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -103680 in STTS, at 5238 st:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -132480 in STTS, at 5240 st:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -900 in STTS, at 7273 st:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -19080 in STTS, at 34777 st:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -22320 in STTS, at 34796 st:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -14220 in STTS, at 34880 st:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -7830 in STTS, at 35309 st:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -10620 in STTS, at 35339 st:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -180 in STTS, at 35904 st:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3274100] Invalid SampleDelta -351360 in STTS, at 51926 st:1[/COLOR]
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'ugur_mumcu_anma_toreni.mp4':
Metadata:
major_brand : f4v
minor_version : 0
compatible_brands: isommp42m4v
creation_time : 2015-01-24 18:13:12
Duration: 01:47:48.97, start: 0.000000, bitrate: 949 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x360, 883 kb/s, 22.79 fps, 25 tbr, 90k tbn, 180k tbc (default)
Metadata:
creation_time : 2015-01-24 18:13:12
handler_name : WowzaStreamingEngine
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 32000 Hz, stereo, fltp, 63 kb/s (default)
Metadata:
creation_time : 2015-01-24 18:13:12
handler_name : WowzaStreamingEngine
At least one output file must be specified
Conversion failed!
```
What is the cause of this error
---
### Author:  [@Michelle\_B](https://community.wowza.com/u/Michelle_B)
#### Post date: [January 27, 2015, 10:51am UTC](https://community.wowza.com/t/record-data-and-synchronous-shift/37437/2 "2015-01-27T10:51:06Z")
Hi,
Can you give us the ffmpeg command format that you used that generated this error? Can you also give us more information on your input source? Also, from this [code source](http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavformat/mov.c;hb=HEAD#l1816), it looks to be due to the sample\_duration being \< 0.
Michelle