unspecified pixel format

[com4343568]

./recode roundtrip 5.mov
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2150ba0] stream 0, offset 0x24: partial file
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2150ba0] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 640x480, 397 kb/s): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Exception (St13runtime_error): Invalid input stream information: Invalid data found when processing input

[lfaraone]

Can you provide a reproducer?

[Manouchehri]

Workaround (thanks to @kepstin):

ffmpeg -i input.mp4 -c copy -movflags faststart output.mp4