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Update (09.01.2011): new versions are available at: http://www.mandrilo.com/index.php/mergemp4flv
MergeMp4Flv 2.0 - freeware (build date: 23.09.2010)
Features:
- merge mp4, flv, mpg files (probably can merge avi with divx,xvid stream but this is not tested). Resulting video is in mp4 format (x264 video stream).
- convert (re-encode) flv or mpg to mp4 files.
Description:
This utility is aimed for youtube users that wish to watch youtube clips on it's own computer and wish to save clips in one large video file if there are more then one video clip. If files are of the same size (resolution, framerate, video and audio codec) then merge operation is done using mp4box which is very fast. If files are in different format (flv, mp4) or in different size then all files are cropped to the most common size and converted to the mpg format. Using DOS copy command files are merged then re-encoded back to the mp4 format (using ffmpeg and libx264 codecs).
Note:
When files are re-encoded resulting video file has audio in the mp2 format which can cause somewhat larger file. This is done to avoid 'audio out of sync' problem. Exception is when one file with h264 stream is converted to mp4 then audio is copied as is.
How to download youtube clips to your local disk:
To download videoclip onto your local disk, use FireFox browser and DownloadHelper plugin. Almost all youtube video files can be downloaded in mp4 format: when viewing youtube video clip, left click on the DownloadHelper icon (small arrow on side of the icon) in the main menu of Firefox then select mp4 file for download. In newer versions you must enable MP4 feature in DownloadHelper Preferences/Capture/Youtube (show widget to switch to mp4), then small box mp4 will show up over the youtube clip, click on it and then repeat steps from above to download mp4 youtube videoclip.
Download:
License:
Utility is freeware. Source code is copyleft although i'll appreciate if you at least mention my site: mandrilo.com if you are using any part of code. Thanks.
MergeMp4Flv 1.0 - freeware (build date: 23.08.2010)
MergeMp4Flv utility is GUI front-end for ffmpeg and mp4box utilities used to merge and re-encode video clips of different sizes in one video stream. If you try to use standard video merge programs, when merging video files of different sizes (ussuall situation for youttube video clips) then resulting video contained more then one stream which is handled very badly by most players. This utility checks if files are of same size, if true, then, ordinary merge is performed which is fast, if not, then all video clips are re-encoded and re sized to the resolution which is most common in all video parts.
Free download of MergeMp4Flv 1.0 setup
C++ source code (done by Visual 2008 sp1 + Qt 4.6.2 framework)
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