mp4

问题 I am playing the .mp4 h264 video in exoplayer with defaultExtractor. Video is not seekable. When i seek the video it goes to start everytime i want to seek it. Others MP4 videos plays fine without any issue . Help me I am beginner of exoplayer . 来源： https://stackoverflow.com/questions/59835152/h264-mp4-video-not-seekable-in-exoplayer

问题 In my use-case I have to provide codec specification within the HTML5 video source 's MIME type. But even a type="video/mp4; codecs=avc1" is not detailed enough for Firefox. Firefox needs the extra detail of for example type="video/mp4; codecs=avc1.64001E" . My problem is that I don't know where to get this 64001E part from. The whole identification happens on server side. So far I was using ffprobe and that's perfectly supplies me JSON format output, like so: ffprobe -select_streams v:0 -v

问题 I'm trying to make a basic online video editor with nodeJS and ffmpeg. To do this I need 2 steps: set the in-and-out times of the videos from the client, which requires the client to view the video at specific times, and switch the position of the video. Meaning, if a single video is used as an input, and split it into smaller parts, it needs to replay from the starting time of the next edited segment, if that makes sense. send the input-output data to nodejs and export it with ffmpeg as a

问题 I want to concatinate 4 different videos of 4 different resolution and type into 1 video which can be played in android. I am using ffmpeg ported on android using https://github.com/guardianproject/android-ffmpeg So I have these 4 different types of videos 1) ./ffmpeg -i 1.mp4 Video: h264 (High), yuv420p, 1920x1080, 16959 kb/s, 29.85 fps, 90k tbr, 90k tbn, 180k tbc Audio: aac, 48000 Hz, stereo, s16, 106 kb/s 2) ffmpeg -i 2.mp4 Video: h264 (Constrained Baseline), yuv420p, 640x480, 3102 kb/s,

问题 This program does not play videos but the sound is okey. I get an error about h264 or MJPG.When trying to play an .mp4 or .avi file I see the this messages. main decoder error: Codec `MJPG' (Motion JPEG Video) is not supported. main decoder error: Codec not supported main decoder error: VLC could not decode the format "MJPG" (Motion JPEG Video) or main decoder error:Codec `h264' (H264 - MPEG-4 AVC (part 10)) is not supported. main decoder error: Codec not supported main decoder error: VLC

问题 I'm getting this error. From what I can google, it needs to configure the webpack file but in this rails app it's a webpacker.yml file. CRA looks like it works fine when using the usual tag. Any help would be appreciated. ./app/javascript/components/User/cover.mp4 1:0 Module parse failed: Unexpected character '' (1:0) You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders (Source code

问题 I have two commands, one in which I specify the output format as -f mp4 : ffmpeg -i input.wav -ac 1 -c:a libfdk_aac -profile:a aac_he -vbr 2 -f mp4 test_export_1.m4a And one which lets ffmpeg guess based on the extension: ffmpeg -i input.wav -ac 1 -c:a libfdk_aac -profile:a aac_he -vbr 2 test_export_2.m4a This gives me two different results. The first one: $ffprobe test_export_1.m4a Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test_export_1.m4a': Metadata: major_brand : isom minor_version : 512

问题 ffmpeg can convert the video to specified constant frame rate. It has round parameter to specify timestamp(PTS) rounding method. It could be zero , int , down , up and near . Given a constant frame rate H.264 mp4 video, how can we determine which PTS rounding method was used to encode this video? 来源： https://stackoverflow.com/questions/63956476/given-a-constant-frame-rate-h-264-mp4-how-to-get-pts-rounding-method-used-durin

问题 ffmpeg can convert the video to specified constant frame rate. It has round parameter to specify timestamp(PTS) rounding method. It could be zero , int , down , up and near . Given a constant frame rate H.264 mp4 video, how can we determine which PTS rounding method was used to encode this video? 来源： https://stackoverflow.com/questions/63956476/given-a-constant-frame-rate-h-264-mp4-how-to-get-pts-rounding-method-used-durin

问题 I have a mp4 video to automatically play on website, but it doesn't play on iphone. Referring to other Q & A about the same issue, I added "playsinline" to the video tag. However it doesn't seem to work and nothing is displayed on the screen of my iphone. Could anyone help me find out what is wrong with my code? <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie