the m4v file cann't play

[blond2005]

I extract mpeg4 from mp4 file, and save to m4v, using the following commnad:

# ffmpeg -i seq_mpeg4_10s.mp4 -c:v copy -f m4v -y seq_mpeg4.m4v

then play seq_mpeg4.m4v file fail. What should I do?

[blond2005]

source file

[blond2005]

Later I tried ffmpeg version 3.3, the same phenomenon
# ffmpeg -i seq_mpeg4_10s.mp4 -c:v copy -f m4v -y seq_mpeg4.m4v
ffmpeg version n3.3.2-1-g20f5e2c Copyright (c) 2000-2017 the FFmpeg developers

built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
configuration:
libavutil 55. 58.100 / 55. 58.100
libavcodec 57. 89.100 / 57. 89.100
libavformat 57. 71.100 / 57. 71.100
libavdevice 57. 6.100 / 57. 6.100
libavfilter 6. 82.100 / 6. 82.100
libswscale 4. 6.100 / 4. 6.100
libswresample 2. 7.100 / 2. 7.100

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'seq_mpeg4_10s.mp4':

Metadata:

major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
encoder : Lavf57.48.101

Duration: 00:00:10.00, start: 0.000000, bitrate: 1725 kb/s

Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 1723 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
Metadata:

handler_name : VideoHandler

Output #0, m4v, to 'seq_mpeg4_2.m4v':

Metadata:

major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
encoder : Lavf57.71.100
Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 1723 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
Metadata:

handler_name : VideoHandler

Stream mapping:

Stream #0:0 -> #0:0 (copy)

Press [q] to stop, ? for help
frame= 250 fps=0.0 q=-1.0 Lsize= 2104kB time=00:00:10.00 bitrate=1723.6kbits/s speed=1.42e+03x
video:2104kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%