为android转换旧的佳能avi视频

我用佳能相机收集了一些旧的视频，它们是avi格式的。我无法在android上播放这些文件，虽然音频工作正常，但上面说

无法播放视频，不支持videocodec

。我尝试了以下方法，但仍然无效：

ffmpeg -i ip.avi -c:v libx264 -c:a aac -movflags +faststart op.mp4

原始avi视频信息：

Input #0, avi, from 'ip.avi'
Metadata:
    creation_time   : 2012-11-17 11:38:53
    encoder         : CanonMVI03
  Duration: 00:01:39.90, start: 0.000000, bitrate: 16256 kb/s
    Stream #0:0: Video: mjpeg (Baseline) (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 640x480, 14844 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'op.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:01:39.92, start: 0.000000, bitrate: 2048 kb/s
    Stream #0:0(und): Video: h264 (High 4:2:2) (avc1 / 0x31637661), yuvj422p(pc), 640x480, 1911 kb/s, 30 fps, 30 tbr, 1000k tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler

已转换的mp4视频信息：

Input #0, avi, from 'ip.avi'
Metadata:
    creation_time   : 2012-11-17 11:38:53
    encoder         : CanonMVI03
  Duration: 00:01:39.90, start: 0.000000, bitrate: 16256 kb/s
    Stream #0:0: Video: mjpeg (Baseline) (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 640x480, 14844 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'op.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:01:39.92, start: 0.000000, bitrate: 2048 kb/s
    Stream #0:0(und): Video: h264 (High 4:2:2) (avc1 / 0x31637661), yuvj422p(pc), 640x480, 1911 kb/s, 30 fps, 30 tbr, 1000k tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler

从职位和以下工作：

ffmpeg -i ip.avi -c:v libx264 -c:a aac op.mp4
ffmpeg -i op.mp4 -vf "scale=2*trunc(iw/2):-2,setsar=1" -profile:v main -pix_fmt yuv420p newop.mp4

---

不需要两个命令。只需使用

ffmpeg-i ip.avi-pix\u fmt yuv420p-movflags+faststart op.mp4

。缺少的

-pix_fmt yuv420p

是Android无法播放它的原因，因为它只能播放yuv420p像素格式。