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    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
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  • How to deal ffplay bein too slow playing iPhone's videos ?

    21 janvier 2019, par Mikhail T.

    Trying to play a 3840x2160 video recorded by an iPhone 7 (@30fps), I get frequent pauses — in the video, music keeps playing.

    This happens both in firefox and when ffplay is invoked to play the file directly — from command-line. The CPU is a dual E6700 @3.20GHz — not super fast, but it should be able to play smoothly, shouldn’t it ? Video is Intel’s "series 4" integrated chipset — again, not a speed-daemon, but it should be adequate... Support for Intel’s VA API is included.

    I build ffmpeg-4.1 from source using FreeBSD port. As you can see, the port has a maddening amount of options — including several different ones for the 264-codec.

    Any suggestions for improving the decoding speed to the point, where it is watchable by a human ? Thank you !

  • How to deal ffplay bein too slow playing iPhone's videos ?

    21 janvier 2019, par Mikhail T.

    Trying to play a 3840x2160 video recorded by an iPhone 7 (@30fps), I get frequent pauses — in the video, music keeps playing.

    This happens both in firefox and when ffplay is invoked to play the file directly — from command-line. The CPU is a dual E6700 @3.20GHz — not super fast, but it should be able to play smoothly, shouldn’t it ? Video is Intel’s "series 4" integrated chipset — again, not a speed-daemon, but it should be adequate... Support for Intel’s VA API is included.

    I build ffmpeg-4.1 from source using FreeBSD port. As you can see, the port has a maddening amount of options — including several different ones for the 264-codec.

    Any suggestions for improving the decoding speed to the point, where it is watchable by a human ? Thank you !

  • If you rotate the iPhone's video with ffmpeg, the rotation information sticks. Can I hide this ?

    24 août 2017, par howmanylife

    The following implementation is a command to rotate the movie by 90 degrees.

    ffmpeg -i video.mp4 -vf transpose=1 -metadata:s:v:0 rotate=0 videoo.mp4
    
-vf transpose=1

    The iPhone’s video contains rotation information and actually

    ffprobe -show_streams -print_format json videoo.mp4 2>/dev/null

    To output motion picture information or rotation information as described below.

     "tags": {
    
                "rotate": "90",
    
                "creation_time": "2017-08-24T01:49:38.000000Z",
    
                "language": "und",
    
                "handler_name": "Core Media Data Handler",
    
                "encoder": "'avc1'"
    
            },
    
            "side_data_list": [
    
                {
    
                    "side_data_type": "Display Matrix",
    
                    "displaymatrix": "\n00000000:            0       65536           0\n00000001:       -65536           0           0\n00000002:            0           0  1073741824\n",
    
                    "rotation": -90
    
                }
    
            ]
    

    

    

    
"rotate": "90",

    and

    "side_data_list":

    and

    "rotation": -90

    Is it possible to hide this ? Or is it possible to erase only this rotation information ?

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