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  • Encoded mp4 video won't play in Firefox v33

    3 novembre 2014, par Michael Heuberger

    When this video is encoded with the following ffmpeg command, it cannot be played in Firefox v33 (a blank screen appears). But when I play it in the native VLC player, it works. So here the long ffmpeg command :

    $ ffmpeg -r 15 -f image2 -i /home/(...)/frames/%d.jpg -i
    
  /home/(...)/preview.wav -y -acodec libfdk_aac -b:a 128k 
    
  -vcodec libx264 -b:v 386k -preset ultrafast -profile:v baseline 
    
  -crf 6 -pix_fmt yuv420p -loglevel warning -movflags faststart 
    
  /home/(...)/preview.mp4

    As you can see, preview.mp4 is encoded by a sequence of jpg images with a given wav file.

    The ffmpeg output is just this

    [wav @ 0x35ff460] Estimating duration from bitrate, this may be inaccurate
    
Guessed Channel Layout for  Input Stream #1.0 : mono
    
[swscaler @ 0x35f0d80] deprecated pixel format used, make sure you did set range correctly

    Any clues why it won’t play on Firefox (and what the other ffpmeg warnings mean) ?

    Thanks !!!

  • MPEG4 X264 vs NVENC H264 encoding play compatibility on old devices

    28 mars 2021, par Root

    I always encoding videos on x264, this encoding work well on old devices or mobile phones.
    
To increase the encoding speed I try to replace encoding method with NVENC H264 with nVidia GPU.

    


    Question 1 : Device combability for play the NVENC H264 is different with x264 ?
    
Question 2 : Old devices can play NVENC H264 file same as x264 ?

    


    Old devices : (All devices that can play x264) Android 6+, TV Setup box, TV, Google chrome 48+

    


  • MPEG4 X264 vs NVENC H264 encoding play compatibility on old devices

    28 mars 2021, par Root

    I always encoding videos on x264, this encoding work well on old devices or mobile phones.
    
To increase the encoding speed I try to replace encoding method with NVENC H264 with nVidia GPU.

    


    Question 1 : Device combability for play the NVENC H264 is different with x264 ?
    
Question 2 : Old devices can play NVENC H264 file same as x264 ?

    


    Old devices : (All devices that can play x264) Android 6+, TV Setup box, TV, Google chrome 48+

    


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