Hi all, Dunno if it's a bug or not. Hi all, I was looking for an mp4 merge tool and came across this. I used the small tutorial given at http://www.thetechrepo.com/main-articles/530-combine-mp4m4v-files-in-linuxubuntu
For seeing whether it works I combined two files which are similar at least on the technical parameters :- $ mediainfo b1.mp4 General Complete name : b1.mp4 Format : MPEG-4 Format profile : Base Media / Version 2 Codec ID : mp42 File size : 28.5 MiB Duration : 9mn 51s Overall bit rate mode : Variable Overall bit rate : 405 Kbps Encoded date : UTC 2011-01-03 14:48:08 Tagged date : UTC 2011-01-03 14:48:08 gsst : 0 gstd : 591783 gssd : BADC23401HH1347937888871802 gshh : o-o---preferred---bom03s03---v16---lscache2.c.youtube.com Video ID : 2 Format : AVC Format/Info : Advanced Video Codec Format profile : Baseline@L2.1 Format settings, CABAC : No Format settings, ReFrames : 1 frame Format settings, GOP : M=1, N=30 Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 9mn 51s Bit rate : 353 Kbps Maximum bit rate : 687 Kbps Width : 400 pixels Height : 326 pixels Display aspect ratio : 1.227 Frame rate mode : Constant Frame rate : 25.000 fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.108 Stream size : 24.8 MiB (87%) Title : (C) 2007 Google Inc. v08.13.2007. Encoded date : UTC 2011-01-03 14:48:09 Tagged date : UTC 2011-01-03 14:48:09 Audio ID : 1 Format : AAC Format/Info : Advanced Audio Codec Format profile : LC Codec ID : 40 Duration : 9mn 51s Bit rate mode : Variable Bit rate : 48.0 Kbps Maximum bit rate : 57.1 Kbps Channel(s) : 1 channel Channel positions : Front: C Sampling rate : 44.1 KHz Compression mode : Lossy Stream size : 3.50 MiB (12%) Title : (C) 2007 Google Inc. v08.13.2007. Encoded date : UTC 2011-01-03 14:48:08 Tagged date : UTC 2011-01-03 14:48:09 $ mediainfo b2.mp4 General Complete name : b2.mp4 Format : MPEG-4 Format profile : Base Media / Version 2 Codec ID : mp42 File size : 34.8 MiB Duration : 12mn 0s Overall bit rate mode : Variable Overall bit rate : 404 Kbps Encoded date : UTC 2011-01-03 14:57:13 Tagged date : UTC 2011-01-03 14:57:13 gsst : 0 gstd : 721396 gssd : BADC23464MH1347938738207834 gshh : o-o---preferred---bom04s04---v14---lscache7.c.youtube.com Video ID : 2 Format : AVC Format/Info : Advanced Video Codec Format profile : Baseline@L2.1 Format settings, CABAC : No Format settings, ReFrames : 1 frame Format settings, GOP : M=1, N=30 Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 12mn 0s Bit rate : 352 Kbps Maximum bit rate : 847 Kbps Width : 400 pixels Height : 326 pixels Display aspect ratio : 1.227 Frame rate mode : Constant Frame rate : 25.000 fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.108 Stream size : 30.3 MiB (87%) Title : (C) 2007 Google Inc. v08.13.2007. Encoded date : UTC 2011-01-03 14:57:14 Tagged date : UTC 2011-01-03 14:57:14 Audio ID : 1 Format : AAC Format/Info : Advanced Audio Codec Format profile : LC Codec ID : 40 Duration : 12mn 0s Bit rate mode : Variable Bit rate : 48.0 Kbps Maximum bit rate : 59.0 Kbps Channel(s) : 1 channel Channel positions : Front: C Sampling rate : 44.1 KHz Compression mode : Lossy Stream size : 4.26 MiB (12%) Title : (C) 2007 Google Inc. v08.13.2007. Encoded date : UTC 2011-01-03 14:57:13 Tagged date : UTC 2011-01-03 14:57:14 These I then decided to merge using the tutorial as a guide :- $ MP4Box -cat b1.mp4 -cat b2.mp4 -new bmiddle.mp4 Appending file b1.mp4 No suitable destination track found - creating new one (type soun) No suitable destination track found - creating new one (type vide) Appending file b2.mp4 No suitable destination track found - creating new one (type soun) Saving bmiddle.mp4: 0.500 secs Interleaving [/code] The end result bmiddle.mp4 plays but the audio in the second part does not play. Doing an inspection using mediainfo showed me this :- $ mediainfo bmiddle.mp4 General Complete name : bmiddle.mp4 Format : MPEG-4 Format profile : Base Media Codec ID : isom File size : 63.3 MiB Duration : 21mn 52s Overall bit rate mode : Variable Overall bit rate : 405 Kbps Encoded date : UTC 2012-09-18 04:34:29 Tagged date : UTC 2012-09-18 04:34:29 Video ID : 2 Format : AVC Format/Info : Advanced Video Codec Format profile : Baseline@L2.1 Format settings, CABAC : No Format settings, ReFrames : 1 frame Format settings, GOP : M=1, N=30 Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 21mn 52s Bit rate : 352 Kbps Maximum bit rate : 687 Kbps Width : 400 pixels Height : 326 pixels Display aspect ratio : 1.227 Frame rate mode : Constant Frame rate : 25.000 fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.108 Stream size : 55.1 MiB (87%) Title : (C) 2007 Google Inc. v08.13.2007. Encoded date : UTC 2011-01-03 14:48:09 Tagged date : UTC 2012-09-18 04:34:29 Audio #1 ID : 1 Format : AAC Format/Info : Advanced Audio Codec Format profile : LC Codec ID : 40 Duration : 9mn 51s Bit rate mode : Variable Bit rate : 48.0 Kbps Maximum bit rate : 57.1 Kbps Channel(s) : 1 channel Channel positions : Front: C Sampling rate : 44.1 KHz Compression mode : Lossy Stream size : 3.50 MiB (6%) Title : (C) 2007 Google Inc. v08.13.2007. Encoded date : UTC 2011-01-03 14:48:08 Tagged date : UTC 2012-09-18 04:34:29 Audio #2 ID : 3 Format : AAC Format/Info : Advanced Audio Codec Format profile : LC Codec ID : 40 Duration : 12mn 0s Bit rate mode : Variable Bit rate : 48.0 Kbps Maximum bit rate : 59.0 Kbps Channel(s) : 1 channel Channel positions : Front: C Sampling rate : 44.1 KHz Compression mode : Lossy Stream size : 4.26 MiB (7%) Title : (C) 2007 Google Inc. v08.13.2007. Encoded date : UTC 2011-01-03 14:57:13 Tagged date : UTC 2012-09-18 04:34:29 Why are there two Audio tracks given Audio #1 and Audio #2 ? Did I do something wrong ? If yes, then what ? Trying to figure how the tool works. Looking forward for answers. -- Regards, Shirish Agarwal शिरीष अग्रवाल My quotes in this email licensed under CC 3.0 http://creativecommons.org/licenses/by-nc/3.0/ http://flossexperiences.wordpress.com 065C 6D79 A68C E7EA 52B3 8D70 950D 53FB 729A 8B17 _______________________________________________ pkg-multimedia-maintainers mailing list pkg-multimedia-maintainers@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-multimedia-maintainers