HitFilm Express 14

I have a problem with the videos I want to play. I import an mp4 video  but it just freezes constantly. 
I’ve checked on Youtube and the internet but couldn’t find a reason why this happens ?.

please help this newbie


  • TheBenNorris
    TheBenNorris Posts: 2,042 Staff

    @mona1984 mp4 is actually a container for a wide range of video codecs, so there is a chance the file you have is an unsupported format. Another potential issue is if the footage is variable frame rate.

    It would help us greatly if you could post your machine specs, as well as use something such as the program MediaInfo to provide us a text breakdown of the footage.

  • Stargazer54
    Stargazer54 Posts: 3,889 Ambassador

    @mona1984 As Ben said there is probably an issue with your originating footage.  Install MediaInfo and return a Tree report here so we can see what the underlying codec is (plus your machine specs).  Also, here is a tutorial on MediInfo.

    Chances are you are going to need to transcode your footage.  You can do that with Handbrake.  Here is a  tutorial for that, as well.

  • mona1984
    mona1984 Posts: 4

    Hi Guys,


    I'll already give you the specs since all the rest is Chinese to me (the programs I should install)

    Dell Latitude E5550

    Core i5 5de gen. 5300U 2.3 GHz

    8 GB, 256 capacity


    do you need to know anything else?

    I hope it's not because of the specs of the laptop ....

  • TheBenNorris
    TheBenNorris Posts: 2,042 Staff

    @mona1984 if you could follow Stargazer's comment (went into more depth than mine) to provide us with the specifics of your footage as well, that would help, as it is likely this is what is causing problems.

  • mona1984
    mona1984 Posts: 4

     Ok I think I figured it out. Audio Steam is AAC LC, is that causing the issue?



    Format : MPEG-4
    Format profile : Base Media / Version 2
    Codec ID : mp42 (mp42/mp41/isom/avc1)
    File size : 144 MiB
    Duration : 51 s 392 ms
    Overall bit rate : 23.5 Mb/s
    Encoded date : UTC 2019-04-18 05:53:09
    Tagged date : UTC 2019-04-18 05:53:09

    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : [email protected]
    Format settings : CABAC / 5 Ref Frames
    Format settings, CABAC : Yes
    Format settings, Reference frames : 5 frames
    Codec ID : avc1
    Codec ID/Info : Advanced Video Coding
    Duration : 51 s 383 ms
    Bit rate : 23.4 Mb/s
    Width : 3 840 pixels
    Height : 2 160 pixels
    Display aspect ratio : 16:9
    Frame rate mode : Constant
    Frame rate : 29.970 (30000/1001) FPS
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.094
    Stream size : 143 MiB (99%)
    Writing library : x264 core 157 r10 d4099dd
    Encoding settings : cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=8 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=48 / lookahead_threads=8 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / stitchable=1 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=infinite / keyint_min=29 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=crf / mbtree=1 / crf=20.0 / qcomp=0.60 / qpmin=5 / qpmax=69 / qpstep=4 / vbv_maxrate=24200 / vbv_bufsize=66000 / crf_max=0.0 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00
    Encoded date : UTC 2019-04-18 05:53:09
    Tagged date : UTC 2019-04-18 05:53:09
    Color range : Limited
    Color primaries : BT.709
    Transfer characteristics : BT.709
    Matrix coefficients : BT.709
    Codec configuration box : avcC

    ID : 2
    Format : AAC LC
    Format/Info : Advanced Audio Codec Low Complexity
    Codec ID : mp4a-40-2
    Duration : 51 s 392 ms
    Bit rate mode : Constant
    Bit rate : 137 kb/s
    Channel(s) : 2 channels
    Channel layout : L R
    Sampling rate : 48.0 kHz
    Frame rate : 46.875 FPS (1024 SPF)
    Compression mode : Lossy
    Stream size : 860 KiB (1%)
    Encoded date : UTC 2019-04-18 05:53:09
    Tagged date : UTC 2019-04-18 05:53:09


  • TheBenNorris
    TheBenNorris Posts: 2,042 Staff

    @mona1984 it seems the data isn't problematic, but it is 4k in a format that isn't optimized for editing, running on a lower-end machine. I do recommend you transcode the footage to a more edit-friendly format, there are a few guides around the forum for it, and probably more online too. That should help slightly. You could also try turning down the playback resolution in the viewer, as well as the playback quality.

  • mona1984
    mona1984 Posts: 4

    Hmmm OK need to check...

    Is it the graph card of the laptop which causes these problems then? 


  • TheBenNorris
    TheBenNorris Posts: 2,042 Staff

    @mona1984 both your CPU and GPU are far from top of the line. I wouldn't really say there is a "problem", as to me that suggests there is an issue with your machine or the software. What is really happening is you're just trying to do something quite demanding, which your machine struggles with. The best solution is to try and make the problem as un-demanding as possible, by converting the file to one more optimal, and dropping the playback resolution. Hopefully that should help.