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Within the above guide, the key variable for changing the data rate is "RF" which you can increase to generate a smaller file size (or vice versa to potentially improve image quality).
If you are experiencing issues uploading your video submission after following the above process then you may have issues with your source material, internet connection, or playback device.
If your video is taking forever to upload then be patient and be prepared to give it many hours (unless you know you should be getting better speeds).
If the recipient cannot play your video back, check they have received a working h264 file. You (or the recipient) can download VLC to establish whether a file is readily playable or not.
If you are having problems with stuttery video whilst editing or playing back, then you can try: faster computer, lowering playback quality in software, or transcoding media into a 'friendlier' format such as mpeg2 or mpeg4 depending on the situation - try both!
To query your source files as an issue: download some test footage, transcode test footage using the fore mentioned Handbreak guide, and check playback in softwareTo eliminate the source material as the issue, try downloading some test footage, transcoding the test footage using the above guide, and seeing if it will play back. If the test footage works ok then your source material needs troubleshootinginvestigating.
To eliminate the internet connection as an issue then try: changing the network; , using a wired connection; , or another computer. If non of this works then we can presume the network connection is ok and the problem is something else.
To eliminate the playback deviceIf playback is an issue, try playing the video on other devices to determine if it's an issue limited to one device. If issues occur across multiple devices then we can presume it's not a problem with the deviceassume there is something fundamentally wrong that needs investigating deeper.
To eliminate this guide as the issue, try using a different piece of transcoding softwaresomething else to compare.
If issues persists, make a note of your fault finding attempts (the above eliminations) and seek technical support, such as through the Digital Media Support Group.
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