Uploaded videos are not playing in mobile browser but are playing on desktop broswer -

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i have set server (gunicorn , nginx) upload videos using python/django, , watch them in browser. video player using videojs. videos h.264 mp4. , video size between 5-40 mb.

the video uploads fine , can watch uploaded video on desktop , laptop browser too.

the problem can't watch same videos (which playing on desktop browser) on mobile devices.

i error:

this video not loaded, either because server or network failed or because format not supported.

what wrong?

update

however tested mobile browsers webm videos in mobile , opera , chrome plays video perfectly. command used webm:

ffmpeg -i test2.mov -codec:v libvpx -quality -cpu-used 0 -b:v 600k -maxrate 600k -bufsize 1200k -qmin 10 -qmax 42 -vf scale=-1:480 -threads 4 -codec:a vorbis -b:a 128k -strict -2 test2_webmmm.webm

and h.264 mp4 (only working firefox):

ffmpeg -i inputfile.avi -codec:v libx264 -profile:v baseline -preset slow -b:v 250k -maxrate 250k -bufsize 500k -vf scale=-1:360 -threads 0 -codec:a libfdk_aac -b:a 96k output.mp4

update

input #0, mov,mp4,m4a,3gp,3g2,mj2, 'faststart.mp4':   metadata:     major_brand     : isom     minor_version   : 512     compatible_brands: isomiso2avc1mp41     encoder         : lavf56.40.100   duration: 00:03:36.56, start: 0.046440, bitrate: 350 kb/s     stream #0:0(und): video: h264 (constrained baseline) (avc1 / 0x31637661), yu v420p, 640x360 [sar 1:1 dar 16:9], 249 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.9 5 tbc (default)     metadata:       handler_name    : videohandler     stream #0:1(und): audio: aac (lc) (mp4a / 0x6134706d), 44100 hz, stereo, flt p, 96 kb/s (default)     metadata:       handler_name    : soundhandler

update

here points gathered along way:

  1. some of videos downloaded youtube , uploaded on server without encoding playing nicely on browsers.
  2. however if encode same video (youtube video) , upload on server, not play on mobile devices on desktop browsers.
  3. videos took mobile (samsung s4 , iphone 6), , encode ffmpeg not playing on mobile browsers, on desktop browsers.
  4. but, url of same videos (which took mobile) hosted on amazon s3 playing nicely on browsers (even non encoded videos).

what official documentation tells:

streaming , aac player compatibility

by default when encoding aac files using libfdk_aac metadata ('moov' atom) written after audio stream ('mdat' atom) @ end of file. in order enable streaming of encoded file 'moov' atom has moved before 'mdat' atom. in addition aac player implementations have issues decoding such files.

ffmpeg offers option '-movflags +faststart' covering functionality can used during encoding:

ffmpeg -i input.wav -c:a libfdk_aac -movflags +faststart output.m4a

existing m4a files can modified "qt-faststart' program distributed ffmpeg in 'tools' directory

qt-faststart input.m4a output.m4a

so can try this:

ffmpeg -i inputfile.avi -codec:v libx264 -profile:v baseline -preset slow -b:v 250k -maxrate 250k -bufsize 500k -vf scale=-1:360 -threads 0 -codec:a libfdk_aac -movflags +faststart output.mp4

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