VideoHelp Forum

Try DVDFab and download streaming video, copy, convert or make Blu-rays,DVDs! Download free trial !
+ Reply to Thread
Results 1 to 9 of 9
Thread
  1. which tool do you recommend?

    I just want to crop some Pixels and dont want to encode the complete video
    Quote Quote  
  2. Dinosaur Supervisor KarMa's Avatar
    Join Date
    Jul 2015
    Location
    US
    Search Comp PM
    You will have to re-encode if you want to crop off some pixels.
    Quote Quote  
  3. Member Cornucopia's Avatar
    Join Date
    Oct 2001
    Location
    Deep in the Heart of Texas
    Search PM
    Theoretically, it ought to be possible to crop using the MP4/AVC/HEVC conformance window cropping rectangles windowing feature, but I don't think a particular app dedicated to just cropping has been created yet.

    Scott
    Quote Quote  
  4. And some containers allow you to specify cropping values, MKV for example. But don't count on any players paying any attention to them.
    Quote Quote  
  5. You should be able to crop the right edge and bottom with roozhou's modified ffmpeg build. The elementary stream VUI parameters are altered, so there is more likelihood that a player will pay attention to them. There is no way that I know of to crop the top and left without re-encoding, but in theory it should be possible

    Can you guys test this out on some players? I set the crop as 16:24 (so 16 from the right, 24 from the bottom)

    Works ok so far in mpchc, potplayer, ffplay, avisynth (lsmash, ffvideosource), but it's only a 10sec test . It plays correctly as 1904x1064 in those listed. Mediainfo reports it as such as well . I haven't tested any HW players

    1.264 is the original elementary stream 1920x1080p24
    1.mp4 is 1.264 in mp4 container
    out2.264 is 1.264 with the VUI parameters set to crop
    ffmpeg2.mp4 is out2.264 in mp4 container
    Image Attached Files
    Quote Quote  
  6. Originally Posted by poisondeathray View Post
    Can you guys test this out on some players?
    It (ffmpeg2.mp4) worked (cropped) on a Raspberry Pi 3 running OSMC (KODI).

    It didn't crop in an old version of SMPlayer on Windows 7.
    Quote Quote  
  7. ok. which free video editing tools with grahic interface do you recommend in general for Mp4 with AVC?
    Quote Quote  
  8. Member
    Join Date
    Dec 2005
    Location
    Canada
    Search Comp PM
    Can you guys test this out on some players?
    WD TV Live, OK.
    Quote Quote  
  9. Originally Posted by poisondeathray View Post
    Can you guys test this out on some players? I set the crop as 16:24 (so 16 from the right, 24 from the bottom)
    My TV with built-in player works and I don't see why it wouldn't. Isn't this parameter used to crop 1088 encoded pixels to 1080 visible (displayed) pixels?

    original file

    sps:0 profile:100/40 poc:0 ref:4 120x68 FRM 8B8 crop:0/0/0/8 VUI 420 1/48 b8 reo:2
    Stream #0:0(und), 1, 1/12288: Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(left), 1920x1080 (1920x1088)

    Cropped file

    sps:0 profile:100/40 poc:0 ref:4 120x68 FRM 8B8 crop:0/16/0/24 VUI 420 1/48 b8 reo:2
    Stream #0:0(und), 1, 1/12288: Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(left), 1904x1064 (1920x1088)
    Quote Quote  



Similar Threads