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avcodec/v4l2_context: log VIDIOC_REQBUFS failures

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Signed-off-by: Aman Gupta <aman@tmm1.net>
This commit is contained in:
Aman Gupta 2019-08-22 12:20:56 -07:00
parent 7b092a074b
commit 87daee944b
1 changed files with 3 additions and 1 deletions
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4
libavcodec/v4l2_context.c
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@ -678,8 +678,10 @@ int ff_v4l2_context_init(V4L2Context* ctx)
req.memory = V4L2_MEMORY_MMAP;
req.type = ctx->type;
ret = ioctl(s->fd, VIDIOC_REQBUFS, &req);
if (ret < 0)
if (ret < 0) {
av_log(logger(ctx), AV_LOG_ERROR, "%s VIDIOC_REQBUFS failed: %s\n", ctx->name, strerror(errno));
return AVERROR(errno);
}
ctx->num_buffers = req.count;
ctx->buffers = av_mallocz(ctx->num_buffers * sizeof(V4L2Buffer));