On 26/11/15 22:34, Vangelis forthnet wrote: > [snip] > If you want to stick to the MP4 container, > some choices are available to you: > 1. If using flash/hlsmodes to fetch TV, then add: > --ffmpeg-tv-opts="-movflags faststart" > to your CLI command. > > The switch above will instruct ffmpeg (a fairly recent > build is needed) to place the moov atom at the start of > the MP4 file, making it streamable. > > Better avoid mp4 tagging with --no-tag > > 2. For existing downloaded MP4 files, you could > again use FFmpeg to relocate mov atom losslessly: > > ffmpeg -i "moov-at-end.mp4" -c copy -movflags faststart > "moov-at-start.mp4" > > or use for the same job the standalone > qt-faststart tool: > > https://walterebert.com/blog/start-playing-mp4-videos-before-download-has-finished/ > > http://multimedia.cx/eggs/improving-qt-faststart/ > https://ffmpeg.zeranoe.com/blog/?p=59 > http://ffmpeg.zeranoe.com/builds/qt-faststart/ > > or GPAC's MP4Box: > > mp4box "moov-at-end.mp4" -out "moov-at-start.mp4" > > If you wish to move away from the MP4 container, then: > 1. if your DLNA client (on the PVR) does have support > for the MPEG TS container (in all probability it should), > then continue to use the hls tvmodes but add --raw to > your command; you'll end up with a .ts file, which is by > definition streamable (ts = transport stream). > 2. Using the --mkv switch will instruct ffmpeg to remux > downloaded elementary streams inside the Matroska container; > due to its altogether different (to the MP4) architecture, it doesn't > have (as you've found out) the streaming restrictions the default > MP4 files created by FFmpeg do... > As usual, well worth reading and thanks for posting this. I have had issues with the moov tag before. It took me ages to sort out and I shall bookmark this post to remind me how for next time.
Many thanks Vangelis. _______________________________________________ get_iplayer mailing list [email protected] http://lists.infradead.org/mailman/listinfo/get_iplayer
