ffmpeg压缩mp4视频没有播放mozilla文件损坏错误

Question

I have compressed mp4 video using ffmpeg in php environment. Videos are being compressed but these are not playing in firefox showing error:

Video can't be played because the file is corrupt

while this video is playing fine in VLC media player also in chrome browser. My code of comression is as-

exec("ffmpeg -i input.mp4 -acodec mp2 output.mp4");

Answer 1

I know this is a few months old, but in case anyone is still intereste: I had this same thing happen and I found it was because my MP4s were encoded in "MPEG-4 Simple profile" a.k.a. H.263/MPEG4 part 2/xvid. These formats are not supported for playback in most browsers any more.

Transcoding the files to H.264 fixed the problem.