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• FFmpeg mp4 encoder for android html

  24 mai 2017, par Dell Watson

  Hello I’m trying to put video .mp4 auto-captured by my webcam using ffmpeg into HTML, and then activated my localhost so my android could see it.

  the video in my android WAS ABLE to play BUT it’s all white and pixels error, so it’s a fail.

  I thought because android has difference surface because in my desktop it runs perfectly, then i keep searching and trying with ogv/webm.

  In the end, I just use a downloaded mp4 and it runs perfectly tho.
  now I think the problem was coming from my mp4-webcam created by ffmpeg(run in cmd)

  I compare a mp4-webcam vs mp4-downloaded

  5sec vs 1min,

  Data-rate : 16477kbps vs 613kbps

  framerate : 30frm/s vs 23frm/s

  size : 9MB vs 5 MB

  even tho it’s only 5sec video by webcam, it still has larger data than a 1min video-downloaded maybe it was because without conversion.

  but the question, is that the reason of the problem ? android-html(google chrome) wasn’t able to display and make a dead pixels since in desktop it runs. it shouldn’t be the problem right ?

  I really need to transfer webcam-record into android-surface (my web-app).

  I have no idea to fix it, any advice ? I’ve been searching a lot. Maybe there was another problem I do not know yet.

  EDIT : my cmd ffmpeg run : ffmpeg -y -f v4l2 -i /dev/video1 -codec:v libx264 -qp 0 -t 0:00:05 hss.mp4

  EDIT 2 : my 2nd thought because ffmpeg encoder that I used(libx264) isnot support for android. but i still no idea

• FFmpeg mp4 encoder for html-android

  25 mai 2017, par Dell Watson

  Hello I’m trying to put video .mp4 auto-captured by my webcam using ffmpeg into HTML (running ffmpeg in desktop-linux), and then activated my localhost so my android will able to see it.

  the video.mp4 was able to run in linux, and in html-desktop.

  the video in my android-browser(html-android) WAS ABLE to play too BUT it’s all white and pixels error, so it’s a fail.

  I thought because android has difference surface because in my desktop it runs perfectly, then i keep searching and trying with ogv/webm.

  In the end, I just use a downloaded another mp4 and it runs perfectly tho.
  now I think the problem was coming from my mp4-webcam created by ffmpeg(run in cmd)

  I compare a mp4-webcam vs mp4-downloaded

  5sec vs 1min,

  Data-rate : 16477kbps vs 613kbps

  framerate : 30frm/s vs 23frm/s

  size : 9MB vs 5 MB

  even tho it’s only 5sec video by webcam, it still has larger data than a 1min video-downloaded maybe it was because without conversion.

  but the question, is that the reason of the problem ? android-html(google chrome) wasn’t able to display and make a dead pixels since in desktop it runs. it shouldn’t be the problem right ?

  I really need to transfer webcam-record into android-surface (my web-app).

  I have no idea to fix it, any advice ? I’ve been searching a lot. Maybe there was another problem I do not know yet.

  EDIT : my cmd ffmpeg run : ffmpeg -y -f v4l2 -i /dev/video1 -codec:v libx264 -qp 0 -t 0:00:05 hss.mp4

  EDIT 2 : my 2nd thought because ffmpeg encoder that I used(libx264) isnot support for android. but i still no idea

• FFMPEG CLI Language Metadata Tagging Output MP4 (Video + Audio) File

  12 juin 2017, par DMtd

  Can anyone help me understand why my attempts at tagging an audio track with language metadata using FFMPEG CLI is failing ? I’ve found various pieces of information on the correct syntax for the tag which I’m still not clear on (so part 1 of my question is what is the correct syntax), but even if I get it right (which I may or may not have), I am wondering if FFMPEG is failing to tag my audio track because my source is wrapped/muxed with a video essence. Does this preclude the ability to language tag ?

  Worth noting, attempts have been made from both MP4 and MKV sources (video and audio) to MP4 (video and audio) and M4A, MP4 and AAC audio only outputs with no success.

  Also worth noting, I’ve also tried using the -metadata title tag with no success.

  I am looking for the following metadata to show up in a mediainfo advanced mode check :

  Language : en
  Language : English

  Here is my command line :

  ffmpeg -i "input.mkv" -c:v libx264 -level:v 3.0 -b:v 5000k -bufsize 4300k -flags +ildct+ilme -top 1 -x264opts tff=1:colorprim=bt470bg:transfer=bt470m:colormatrix=bt470bg -vf crop=720:576:0:32 -pix_fmt yuv420p -c:a aac -b:a 128k -metadata language="eng" -aspect 4:3 -y "output.mp4"