ffmpeg mp4视频无法在浏览器的html5视频播放器上播放（格式错误）

Question

I am executing the following command to insert a watermark on the video and output as a mp4 format but that format is not playing on the browser by html5 video player.

$video_url = '../../../uploads/myvideo.mp4';
$watermarked = '../../../uploads/watermarked_video.mp4';
exec("ffmpeg -i $video_url -vf \"movie='sos.png', crop=iw:ih:0:0:dar [img]; [in] [img] overlay=(W-w)/2:(H-h)/2 [out]\" -vcodec mpeg4 -f avi $watermarked");  //creating water marked video

if i download it to my local machine then its playing perfectly on the player.

is there any syntax problem?

Answer 1

The output format is not quite right. There are two factors to consider here:

1. The "container format" or the "file format", which is the way the whole file is arranged (eg AVI, MOV/QuickTime, WebM, Ogg)
2. The "codec", which is the algorithm used to compress and uncompress the video and audio data within the container. Most files will have two codecs: one for audio (eg AAC, Vorbis, MP3, Opus) and one for video (eg H.264, VP8, Theora).

ffmpeg supports reading and writing many different formats and codecs, as does VLC player. QuickTime does too, but not quite as many. Browsers, however, are much more picky. You're saving your file in an "AVI" container format, which browsers don't support. And you should probably use libx264 as the codec, which will output H.264 video and is a little more widely used and reliable than mpeg4 which will output MPEG-4 Part 2 video.

Try this:

$video_url = '../../../uploads/myvideo.mp4';
$watermarked = '../../../uploads/watermarked_video.mp4';
exec("ffmpeg -i $video_url -i sos.png -filter_complex \"[1:v]crop=iw:ih:0:0:dar [img]; [0:v] [img] overlay=(W-w)/2:(H-h)/2 [out]\" -map \"[out]\" -map 0:a -vcodec libx264 -acodec copy $watermarked");  //creating water marked video

• I've removed the -f parameter because ffmpeg can infer the format from the output file extension.

• The movie filter has been removed from the example because it is not needed.

• -vf was replaced in this example with -filter_complex . See simple and complex filtering to see what the differences are.

• The audio in this example will be stream copied with -acodec copy instead of re-encoded.