youtube doesn't like joined .MP4 h.264 files

[Driber]

I have 2 separate .mp4 files with h264 video @ 720p inside.

I've joined them together with YAMB and they play perfectly fine on my PC.

But when I upload the file to YT, YT only recognizes the first part. It stop plays exactly at the point where the first joined file ends.

How can I fix this without having to re-encode them?

[bat999]

I've joined them together with YAMB and they play perfectly fine on my PC.
...
How can I fix this without having to re-encode them?

Check the joined file with MediaInfo first.

[Driber]

General
CompleteName : L:\xxxxxx\join_test1.mp4
Format : MPEG-4
Format_Profile : Base Media
CodecID : isom
FileSize/String : 8.54 MiB
Duration/String : 4s 170ms
OverallBitRate_Mode/String : VBR
OverallBitRate/String : 17.2 Mbps
Encoded_Date : UTC 2012-06-27 13:04:09
Tagged_Date : UTC 2012-06-27 13:04:09

Video
ID/String : 2
Format : AVC
Format/Info : Advanced Video Codec
Format_Profile : Baseline@L3.1
Format_Settings_CABAC/String : No
Format_Settings_RefFrames/String : 2 frame2
MuxingMode : Container profile=Baseline@0.0
CodecID : avc1
CodecID/Info : Advanced Video Coding
Duration/String : 4s 170ms
Source_Duration/String : 7s 508ms
BitRate_Mode/String : VBR
BitRate/String : 10.0 Mbps
BitRate_Maximum/String : 14.0 Mbps
Width/String : 1280 pixel3
Height/String : 720 pixel3
DisplayAspectRatio/String : 16:9
FrameRate_Mode/String : CFR
FrameRate/String : 29.970 fps3
ColorSpace : YUV
ChromaSubsampling : 4:2:0
BitDepth/String : 8 bit3
ScanType/String : Progressive
Bits-(Pixel*Frame) : 0.363
StreamSize/String : 4.99 MiB (58%)
Source_StreamSize/String : 8.36 MiB (98%)
Language/String : en
Encoded_Date : UTC 2012-06-23 13:55:13
Tagged_Date : UTC 2012-06-27 13:04:10

Audio
ID/String : 1
Format : AAC
Format/Info : Advanced Audio Codec
Format_Profile : LC
CodecID : 40
Duration/String : 4s 138ms
Source_Duration/String : 7s 445ms
BitRate_Mode/String : CBR
BitRate/String : 192 Kbps
Channel(s)/String : 2 channel2
ChannelPositions : Front: L R
SamplingRate/String : 48.0 KHz
Compression_Mode/String : Lossy
Video_Delay/String : -10ms
StreamSize/String : 97.0 KiB (1%)
Source_StreamSize/String : 175 KiB (2%)
Language/String : en
Encoded_Date : UTC 2012-06-23 13:55:13
Tagged_Date : UTC 2012-06-27 13:04:10

[bat999]

Hi
MediaInfo shows "Duration/String : 4s 170ms"

Maybe YAMB has botched the job.

Try joining with different software.
Such as "My MP4Box GUI"
From here ---> http://my-mp4box-gui.zymichost.com/

[Driber]

Yeah I guess it did botch the job.

I re-created the mp4 in XMedia Recode (direct video and audio copy) and that fixed it!