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
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
NOTE: This solution adds the subtitles to the video as a separate optional (and user-controlled) subtitle track. ffmpeg -i infile.mp4 -i infile.srt -c copy -c:s mov_text outfile.mp4 -vf subtitles=infile.srt will not work with -c copy The order of -c copy -c:s mov_text is important. You are telling FFmpeg: Video: copy, Audio: copy, Subtitle: copy Subtitle: … 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