avconv: convert failed

Question

七牛完整的回调结果是：

{"id":"5561af077823de4068e70e73","pipeline":"0.default","code":3,"desc":"The fop is failed","reqid":"1i0AAI3gUg55I-ET","inputBucket":"xinnongyun","inputKey":"media/video_hd/video_79fc5b6b-d79e-469c-a3c8-c33604b2820d.MP4","items":[{"cmd":"avthumb/mp4/ab/64k/acodec/libmp3lame/rotate/90/s/640x640/aspect/1:1|saveas/eGlubm9uZ3l1bjptZWRpYS92aWRlb19zZC92aWRlb183OWZjNWI2Yi1kNzllLTQ2OWMtYTNjOC1jMzM2MDRiMjgyMGQuTVA0Lm1wNA==","code":0,"desc":"The fop was completed successfully","hash":"FhtBD2-PisQvxA0b93Ij_C8izBR9","key":"media/video_sd/video_79fc5b6b-d79e-469c-a3c8-c33604b2820d.MP4.mp4"},{"cmd":"vframe/jpg/offset/1/rotate/90/w/640/h/640|saveas/eGlubm9uZ3l1bjptZWRpYS92aWRlb190aHVtYi92aWRlb183OWZjNWI2Yi1kNzllLTQ2OWMtYTNjOC1jMzM2MDRiMjgyMGQuTVA0LmpwZw==","code":0,"desc":"The fop was completed successfully","hash":"FiVngYXYYGE4k85c8H6yA6f2irCI","key":"media/video_thumb/video_79fc5b6b-d79e-469c-a3c8-c33604b2820d.MP4.jpg"},{"cmd":"avthumb/mp4/ab/64k/acodec/libmp3lame/rotate/90/s/640x640/aspect/1:1/wmImage/aHR0cDovL3d3dy5ubm9uZy5jb20vYXBpLWpvdXJuYWwvNTEyL21hc2sv/wmGravity/NorthWest|saveas/eGlubm9uZ3l1bjptZWRpYS92aWRlb19tYXNrL3ZpZGVvXzc5ZmM1YjZiLWQ3OWUtNDY5Yy1hM2M4LWMzMzYwNGIyODIwZC5NUDQubXA0","code":3,"desc":"The fop is failed","error":"execute fop cmd failed: avconv: convert failed"}]}

可以看到第 3 个操作失败了，问题出在哪儿呢？

Answer 1

日志中显示：错误可能为 MinBitRate(video) failed, err: invalid bitrate 导致，可以尝试先avthumb/mp4试试。