Safari requires webserver to support “Range” request header in order to play your media content. https://developer.apple.com/library/safari/documentation/AppleApplications/Reference/SafariWebContent/CreatingVideoforSafarioniPhone/CreatingVideoforSafarioniPhone.html#//apple_ref/doc/uid/TP40006514-SW6 For a legit “Range” request response, your webserve need to return status code “206”.
Using ffmpeg 4.0, released Apr 20 2018 or newer, ffmpeg -i video.mp4 -i image.png -map 1 -map 0 -c copy -disposition:0 attached_pic out.mp4
Iphones use something called byte-ranges for audio and video requests. See this link for a solution. It’s in Appendix A. http://mobiforge.com/developing/story/content-delivery-mobile-devices
A fragmented MP4 contains a series of segments which can be requested individually if your server supports byte-range requests. Boxes aka Atoms All MP4 files use an object oriented format that contains boxes aka atoms. You can view a representation of the boxes in your MP4 using an online tool such as MP4 Parser or … Read more
Seems like faststart support has been included in ffmpeg. FFmpeg Formats Documentation: -movflags faststart Run a second pass moving the moov atom on top of the file. This operation can take a while, and will not work in various situations such as fragmented output, thus it is not enabled by default.
Sadly Chrome – like other HTML5 browsers – tries to be smart about what it’s downloading and avoids unnecessary bandwidth usage… this means that sometimes we’re left with a sub-optimal experience (ironically YouTube suffers from this so much that there are extensions to force more pre-buffering!) That said, I’ve not found this to be required … Read more
This should do the trick: ffmpeg -re -i infile.ext -g 52 \ -c:a aac -b:a 64k -c:v libx264 -b:v 448k \ -f mp4 -movflags frag_keyframe+empty_moov \ output.mp4 frag_keyframe causes fragmented output, empty_moov will cause output to be 100% fragmented; without this the first fragment will be muxed as a short movie (using moov) followed by … Read more
First off, it’s important to understand that there is no single standard H.264 elementary bitstream format. The specification document does contain an Annex, specifically Annex B, that describes one possible format, but it is not an actual requirement. The standard specifies how video is encoded into individual packets. How these packets are stored and transmitted … Read more
FFmpeg has three concatenation methods: 1. concat video filter Use this method if your inputs do not have the same parameters (width, height, etc), or are not the same formats/codecs, or if you want to perform any filtering. Note that this method performs a re-encode of all inputs. If you want to avoid the re-encode, … Read more