On Wed, 24 Sep 2025 20:15:06 +0200, Timo Rothenpieler via ffmpeg-user <ffmpeg-user@ffmpeg.org> wrote:
>On 24.09.2025 09:54, Bo Berglund via ffmpeg-user wrote: >> On Wed, 11 Jun 2025 20:54:06 +0200, Bo Berglund >> <bo.berglund-at-gmail....@ffmpeg.org> wrote: >> >>> The hybrid_fragmented flag is used to enable viewers to read an mp4 file >>> while >>> it is being wrtitten according to the documentation here: >>> https://ffmpeg.org/ffmpeg-formats.html >>> >>> But has it been released yet and in that case from which version is it >>> available? >>> I really need to be able to start viewing mp4 files before they are closed >>> by >>> the writer.... >> >> So now 3+ months later and noone seems to know about this? >> >> Will this flag ever be available to the public using Linux? >> >> Or is it available, but only if one uses some special installation of ffmpeg >> (I >> am using the standard apt delivered ffmpeg on Ubuntu Server 24.04.3 LTS) >> >> TIA >> > >https://github.com/FFmpeg/FFmpeg/commit/6ec22731ae7694d4db08fff556eea58aa3b990d3 So that is a *description* of why you need it (in my case I want to read an unfinished mp4 while it is being downloaded). Now I have grabbed the very latest ffmpeg nightly from github and symlinked it to be the on-path ffmpeg on one of my Linux machines and it does work for my ordinary scripts to get the mp4 downloads working. So I am on the bleeding edge of ffmpeg on that device. But I have totally failed in using it with movflags, probably due to the lack of instructions on *how* to activate that flag... So please give me an example command for ffmpeg download where it is used successfully to allow reading while writing the mp4 file. I use this ffmpeg command in my download script today where I am forced to save into a ts file because of the inability to read it if it is set to mp4 and I want to modify it to use the new flag to allow me to download into an mp4: CMD="ffmpeg -hide_banner -loglevel warning ${MODE} -i \"${M3U8URL}\" -r 30 -vf scale=w=-4:h=480 -c:v libx264 -preset fast -crf 26 -x264-params keyint=30:scenecut=0:open-gop=0 -c:a aac -t ${CAPTURETIME} -f mpegts ${TARGETFILETS}" The variables are: MODE = "-referer \"${VIDEOURL}\"" VIDEOURL = https URL of the webpage hosting the player M3U8URL = the m3u8 of the video stream CAPTURETIME = download time in seconds TARGETFILETS = the ts video file name which I want to be an mp4 instead I have tried adding this command before the -i argument: movflags=+hybrid_fragmented But it does not work, throws an error. Apparently I do not know how to apply the movflags argument..... Please help! -- Bo Berglund Developer in Sweden _______________________________________________ ffmpeg-user mailing list -- ffmpeg-user@ffmpeg.org To unsubscribe send an email to ffmpeg-user-le...@ffmpeg.org
