# mp4 file with major\_brand mp42 will not playback on wowza 4.5.0.03 **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [November 17, 2016, 6:00am UTC](https://community.wowza.com/t/mp4-file-with-major-brand-mp42-will-not-playback-on-wowza-4-5-0-03/47167 "2016-11-17T06:00:49Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Art\_Vanderhoffer](https://avatars.discourse-cdn.com/v4/letter/a/e47774/32.png) [@Art\_Vanderhoffer](https://community.wowza.com/u/Art_Vanderhoffer)\ **Post date:** [November 17, 2016, 6:00am UTC](https://community.wowza.com/t/mp4-file-with-major-brand-mp42-will-not-playback-on-wowza-4-5-0-03/47167/1 "2016-11-17T06:00:49Z")
Hello, I have two sibling files that are from a common parent (child copies). The difference between the two is the major\_version, with the mp42 file NOT playing while isom does. Can somebody explain the reason why the mp42 would NOT work but a isom does? Grandparent file : sample.mp4 (big buck bunny form /content) ```auto Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 title : Big Buck Bunny, Sunflower version Duration: 00:10:34.63, start: 0.021333, bitrate: 743 kb/s Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 512x288 [SAR 1:1 DAR 16:9], 640 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default) Metadata: handler_name : SoundHandler ``` converted to shorter file for testing with ```auto ffmpeg -ss 0:00:00 -i /home/_wow/content/sample.mp4 -t 0:0:10 -c copy /home/_wow/content/parent.mp4 ``` ```auto Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/_wow/content/out.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 title : Big Buck Bunny, Sunflower version Duration: 00:00:10.00, start: 0.021000, bitrate: 705 kb/s Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 512x288 [SAR 1:1 DAR 16:9], 601 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default) Metadata: handler_name : SoundHandler ``` Child number one is created with gstreamer 1.10 using x264enc and produces ```auto Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42mp41isomiso2 title : Big Buck Bunny, Sunflower version Duration: 00:00:10.01, start: 0.000000, bitrate: 487 kb/s Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, bt470bg/smpte170m/bt709), 512x288 [SAR 1:1 DAR 16:9], 460 kb/s, 30 fps, 30 tbr, 3k tbn, 60 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 21 kb/s (default) Metadata: creation_time : 2016-11-17 13:13:16 handler_name : SoundHandler ``` This will NOT play back from wowza with a server comment ```auto MediaReaderH264.open[2]: java.lang.NegativeArraySizeException: java.lang.NegativeArraySizeException|at com.wowza.wms.mediareader.h264.util.QTUtils.parseAtomudta(QTUtils.java:393)|at com.wowza.wms.mediareader.h264.util.QTUtils.parseAtomtrak(QTUtils.java:1047)|at com.wowza.wms.mediareader.h264.util.QTUtils.parseAtommoov(QTUtils.java:918)|at com.wowza.wms.mediareader.h264.util.QTUtils.parseQTMediaContainer(QTUtils.java:149)|at com.wowza.wms.mediareader.h264.MediaReaderH264.open(MediaReaderH264.java:328)| ``` If I now take that file and do a copy through ffmpeg it plays. ```auto ffmpeg -i /home/_wow/content/child.mp4 -c copy /home/_wow/content/sibling.mp4 ``` ```auto Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 title : Big Buck Bunny, Sunflower version Duration: 00:00:10.01, start: 0.000000, bitrate: 490 kb/s Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, bt470bg/smpte170m/bt709), 512x288 [SAR 1:1 DAR 16:9], 460 kb/s, 30 fps, 30 tbr, 12k tbn, 60 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 21 kb/s (default) Metadata: handler_name : SoundHandler ``` My understanding is the ffmpeg -copy command should not be changing the structure of the file. Is the change to isom a real change or just metadata. Is there anything else I can adjust on the mp42 file so it will play? Thanks Art ---
**Author:** ![system](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/system/32/447_2.png) [@system](https://community.wowza.com/u/system)\ **Post date:** [November 21, 2016, 11:53am UTC](https://community.wowza.com/t/mp4-file-with-major-brand-mp42-will-not-playback-on-wowza-4-5-0-03/47167/2 "2016-11-21T11:53:19Z")
This may be a [bug](https://ffmpeg.org/bugreports.html) with the FFmpeg build that you have failing to move the moov atom properly. Please consult FFmpeg development for additional information. You stated that you used gstreamer 1.10 to create the child file, however you did not show the method of creation. Best practice is to force the output container type using the -f switch. ffmpeg -ss 0:00:00 -i /home/\_wow/content/sample.mp4 -t 0:0:10 -c copy -f mp4 /home/\_wow/content/parent.mp4 When [seeking](https://trac.ffmpeg.org/wiki/Seeking#Seekingwhiledoingacodeccopy) FFmpeg may not start the copy on a keyframe which will break playback if you are using an older version. If you encode the file then FFmpeg will create a keyframe at the beginning of the output file as well as add the moov atom at the end of the file. Also ensure that you are using the latest version of FFMpeg as it will have a more accurate seek method than earlier versions.